./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:24:21,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:24:21,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:24:21,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:24:21,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:24:21,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:24:21,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:24:21,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:24:21,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:24:21,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:24:21,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:24:21,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:24:21,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:24:21,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:24:21,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:24:21,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:24:21,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:24:21,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:24:21,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:24:21,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:24:21,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:24:21,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:24:21,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:24:21,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:24:21,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:24:21,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:24:21,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:24:21,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:24:21,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:24:21,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:24:21,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:24:21,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:24:21,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:24:21,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:24:21,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:24:21,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:24:21,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:24:21,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:24:21,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:24:21,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:24:21,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:24:21,394 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 20:24:21,412 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:24:21,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:24:21,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:24:21,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:24:21,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:24:21,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:24:21,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:24:21,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:24:21,413 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:24:21,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:24:21,414 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:24:21,414 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 20:24:21,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:24:21,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:24:21,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:24:21,414 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 20:24:21,414 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 20:24:21,415 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 20:24:21,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:24:21,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 20:24:21,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:24:21,422 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:24:21,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:24:21,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:24:21,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:24:21,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:24:21,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:24:21,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:24:21,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:24:21,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:24:21,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:24:21,423 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2021-12-06 20:24:21,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:24:21,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:24:21,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:24:21,614 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:24:21,615 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:24:21,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2021-12-06 20:24:21,657 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data/8c76cb689/5434bf0359294eb59d3d0b52f8546a68/FLAG657fc948d [2021-12-06 20:24:22,057 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:24:22,058 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2021-12-06 20:24:22,067 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data/8c76cb689/5434bf0359294eb59d3d0b52f8546a68/FLAG657fc948d [2021-12-06 20:24:22,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data/8c76cb689/5434bf0359294eb59d3d0b52f8546a68 [2021-12-06 20:24:22,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:24:22,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:24:22,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:24:22,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:24:22,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:24:22,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:24:22" (1/1) ... [2021-12-06 20:24:22,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b310d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:22, skipping insertion in model container [2021-12-06 20:24:22,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:24:22" (1/1) ... [2021-12-06 20:24:22,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:24:22,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:24:22,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:24:22,325 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) [2021-12-06 20:24:22,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36f65601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:22, skipping insertion in model container [2021-12-06 20:24:22,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:24:22,326 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-06 20:24:22,327 INFO L158 Benchmark]: Toolchain (without parser) took 246.66ms. Allocated memory is still 98.6MB. Free memory was 57.3MB in the beginning and 46.1MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 20:24:22,327 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 98.6MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 20:24:22,328 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.80ms. Allocated memory is still 98.6MB. Free memory was 56.9MB in the beginning and 46.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 20:24:22,329 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 98.6MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.80ms. Allocated memory is still 98.6MB. Free memory was 56.9MB in the beginning and 46.1MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 545]: Unsupported Syntax Found a cast between two array/pointer types 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=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:24:23,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:24:23,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:24:23,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:24:23,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:24:23,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:24:23,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:24:23,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:24:23,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:24:23,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:24:23,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:24:23,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:24:23,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:24:23,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:24:23,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:24:23,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:24:23,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:24:23,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:24:23,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:24:23,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:24:23,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:24:23,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:24:23,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:24:23,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:24:23,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:24:23,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:24:23,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:24:23,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:24:23,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:24:23,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:24:23,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:24:23,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:24:23,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:24:23,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:24:23,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:24:23,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:24:23,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:24:23,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:24:23,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:24:23,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:24:23,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:24:23,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 20:24:23,755 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:24:23,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:24:23,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:24:23,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:24:23,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:24:23,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:24:23,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:24:23,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:24:23,757 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:24:23,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:24:23,758 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:24:23,758 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 20:24:23,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:24:23,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:24:23,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:24:23,758 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 20:24:23,758 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 20:24:23,759 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 20:24:23,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:24:23,759 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 20:24:23,759 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 20:24:23,759 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 20:24:23,759 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:24:23,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:24:23,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:24:23,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:24:23,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:24:23,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:24:23,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:24:23,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:24:23,760 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 20:24:23,761 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 20:24:23,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:24:23,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 20:24:23,761 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc33a4b6801f9f06dbbb17ff694aba4439c76c6a2b62ec290c2132cc01ea0fe [2021-12-06 20:24:23,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:24:24,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:24:24,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:24:24,004 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:24:24,005 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:24:24,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2021-12-06 20:24:24,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data/04e8a1539/d5af4bb5daac459fb8b4defb725a8a68/FLAG5e7698d1f [2021-12-06 20:24:24,496 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:24:24,496 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/sv-benchmarks/c/array-memsafety/diff-alloca-2.i [2021-12-06 20:24:24,509 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data/04e8a1539/d5af4bb5daac459fb8b4defb725a8a68/FLAG5e7698d1f [2021-12-06 20:24:24,520 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/data/04e8a1539/d5af4bb5daac459fb8b4defb725a8a68 [2021-12-06 20:24:24,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:24:24,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:24:24,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:24:24,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:24:24,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:24:24,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74794fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24, skipping insertion in model container [2021-12-06 20:24:24,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:24:24,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:24:24,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:24:24,756 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 20:24:24,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:24:24,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:24:24,790 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:24:24,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:24:24,840 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:24:24,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24 WrapperNode [2021-12-06 20:24:24,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:24:24,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:24:24,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:24:24,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:24:24,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,875 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-12-06 20:24:24,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:24:24,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:24:24,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:24:24,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:24:24,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:24:24,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:24:24,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:24:24,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:24:24,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (1/1) ... [2021-12-06 20:24:24,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:24:24,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:24,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:24:24,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:24:24,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 20:24:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 20:24:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 20:24:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 20:24:24,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:24:24,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:24:25,026 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:24:25,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:24:25,313 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:24:25,318 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:24:25,318 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 20:24:25,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:24:25 BoogieIcfgContainer [2021-12-06 20:24:25,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:24:25,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:24:25,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:24:25,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:24:25,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:24:24" (1/3) ... [2021-12-06 20:24:25,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7458bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:24:25, skipping insertion in model container [2021-12-06 20:24:25,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:24" (2/3) ... [2021-12-06 20:24:25,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7458bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:24:25, skipping insertion in model container [2021-12-06 20:24:25,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:24:25" (3/3) ... [2021-12-06 20:24:25,327 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-alloca-2.i [2021-12-06 20:24:25,333 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:24:25,333 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-06 20:24:25,372 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:24:25,378 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 [2021-12-06 20:24:25,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-06 20:24:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:24:25,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:25,394 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:25,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-06 20:24:25,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:25,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601908532] [2021-12-06 20:24:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:25,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:25,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:25,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:25,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 20:24:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:25,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:24:25,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:25,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:24:25,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:24:25,635 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-12-06 20:24:25,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 44 [2021-12-06 20:24:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:25,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:25,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:25,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601908532] [2021-12-06 20:24:25,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601908532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:25,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:25,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:24:25,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81724745] [2021-12-06 20:24:25,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:25,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:24:25,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:24:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:25,782 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:25,795 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-12-06 20:24:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:24:25,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:24:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:25,802 INFO L225 Difference]: With dead ends: 49 [2021-12-06 20:24:25,802 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 20:24:25,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:25,806 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:25,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-06 20:24:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 20:24:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-12-06 20:24:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-12-06 20:24:25,832 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 7 [2021-12-06 20:24:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:25,832 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-12-06 20:24:25,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-12-06 20:24:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:24:25,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:25,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:25,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:26,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:26,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:26,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-12-06 20:24:26,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:26,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341400813] [2021-12-06 20:24:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:26,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:26,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:26,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 20:24:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:26,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:24:26,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:26,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:26,231 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-06 20:24:26,232 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 2 case distinctions, treesize of input 12 treesize of output 20 [2021-12-06 20:24:26,240 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 20 treesize of output 18 [2021-12-06 20:24:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:26,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:26,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:26,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341400813] [2021-12-06 20:24:26,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341400813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:26,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:26,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:26,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214824959] [2021-12-06 20:24:26,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:26,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:26,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:26,299 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:26,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:26,537 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-12-06 20:24:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:26,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:24:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:26,539 INFO L225 Difference]: With dead ends: 83 [2021-12-06 20:24:26,539 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 20:24:26,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:26,540 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:26,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 167 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:24:26,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 20:24:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 46. [2021-12-06 20:24:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.696969696969697) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-12-06 20:24:26,546 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 7 [2021-12-06 20:24:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:26,546 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-12-06 20:24:26,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-12-06 20:24:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 20:24:26,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:26,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:26,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 20:24:26,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:26,749 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-06 20:24:26,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:26,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576487002] [2021-12-06 20:24:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:26,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:26,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:26,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:26,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 20:24:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:26,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:24:26,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:26,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:26,949 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-12-06 20:24:26,949 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 2 case distinctions, treesize of input 16 treesize of output 24 [2021-12-06 20:24:26,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-06 20:24:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:27,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:27,076 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:27,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576487002] [2021-12-06 20:24:27,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576487002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:27,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:27,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:27,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334217139] [2021-12-06 20:24:27,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:27,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:27,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:27,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:27,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:27,078 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:27,110 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-12-06 20:24:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:24:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 20:24:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:27,111 INFO L225 Difference]: With dead ends: 46 [2021-12-06 20:24:27,111 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 20:24:27,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:27,112 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:27,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 108 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2021-12-06 20:24:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 20:24:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-06 20:24:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.6875) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-06 20:24:27,116 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2021-12-06 20:24:27,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:27,117 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-06 20:24:27,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-06 20:24:27,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 20:24:27,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:27,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:27,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:27,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:27,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:27,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130454, now seen corresponding path program 1 times [2021-12-06 20:24:27,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:27,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089803126] [2021-12-06 20:24:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:27,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:27,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:27,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 20:24:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:24:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:27,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:27,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089803126] [2021-12-06 20:24:27,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089803126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:27,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:27,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:27,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130001884] [2021-12-06 20:24:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:27,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:27,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:27,465 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:27,504 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-12-06 20:24:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 20:24:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:27,505 INFO L225 Difference]: With dead ends: 47 [2021-12-06 20:24:27,506 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 20:24:27,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:27,507 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:27,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 78 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 20:24:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-12-06 20:24:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-06 20:24:27,510 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 9 [2021-12-06 20:24:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:27,511 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-06 20:24:27,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-06 20:24:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:24:27,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:27,511 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:27,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 20:24:27,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:27,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:27,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:27,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083541, now seen corresponding path program 1 times [2021-12-06 20:24:27,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:27,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138103456] [2021-12-06 20:24:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:27,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:27,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:27,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:27,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 20:24:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:27,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:24:27,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:27,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:27,859 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:27,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138103456] [2021-12-06 20:24:27,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138103456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:27,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:27,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 20:24:27,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5981274] [2021-12-06 20:24:27,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:27,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:24:27,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:27,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:24:27,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:24:27,861 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:27,931 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-12-06 20:24:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:24:27,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 20:24:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:27,932 INFO L225 Difference]: With dead ends: 78 [2021-12-06 20:24:27,932 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 20:24:27,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:24:27,933 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 174 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:27,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 200 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 20:24:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2021-12-06 20:24:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-06 20:24:27,938 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 11 [2021-12-06 20:24:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:27,938 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-06 20:24:27,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-06 20:24:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:24:27,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:27,938 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:27,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 20:24:28,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:28,140 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025171, now seen corresponding path program 1 times [2021-12-06 20:24:28,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:28,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792780450] [2021-12-06 20:24:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:28,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:28,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:28,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:28,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 20:24:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:28,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:24:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:28,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:28,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:28,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792780450] [2021-12-06 20:24:28,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792780450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:28,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:28,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:24:28,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689491761] [2021-12-06 20:24:28,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:28,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:24:28,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:28,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:24:28,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:28,254 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:28,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:28,323 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-12-06 20:24:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:24:28,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 20:24:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:28,324 INFO L225 Difference]: With dead ends: 48 [2021-12-06 20:24:28,324 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 20:24:28,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:28,326 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:28,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 20:24:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-06 20:24:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-06 20:24:28,330 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2021-12-06 20:24:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:28,330 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-06 20:24:28,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-06 20:24:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 20:24:28,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:28,331 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:28,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 20:24:28,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:28,533 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:28,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-06 20:24:28,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:28,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261074491] [2021-12-06 20:24:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:28,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:28,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:28,539 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:28,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 20:24:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:28,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 20:24:28,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:28,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:28,710 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-12-06 20:24:28,711 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 2 case distinctions, treesize of input 16 treesize of output 24 [2021-12-06 20:24:28,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-06 20:24:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:28,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:29,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:24:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:29,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:29,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261074491] [2021-12-06 20:24:29,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261074491] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:29,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:29,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-06 20:24:29,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601652513] [2021-12-06 20:24:29,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:29,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 20:24:29,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 20:24:29,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:24:29,504 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:30,048 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2021-12-06 20:24:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:24:30,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 20:24:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:30,050 INFO L225 Difference]: With dead ends: 85 [2021-12-06 20:24:30,050 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 20:24:30,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:24:30,050 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 230 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:30,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 186 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 21 Unchecked, 0.5s Time] [2021-12-06 20:24:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 20:24:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 56. [2021-12-06 20:24:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.5) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-12-06 20:24:30,054 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 11 [2021-12-06 20:24:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:30,055 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-12-06 20:24:30,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-12-06 20:24:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:24:30,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:30,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:30,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 20:24:30,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:30,257 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2021-12-06 20:24:30,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775900667] [2021-12-06 20:24:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:30,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:30,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:30,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:30,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 20:24:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:24:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:30,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:24:30,336 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-12-06 20:24:30,336 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 2 case distinctions, treesize of input 61 treesize of output 68 [2021-12-06 20:24:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:30,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:30,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:30,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775900667] [2021-12-06 20:24:30,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775900667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:30,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:30,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:24:30,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956013817] [2021-12-06 20:24:30,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:30,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:24:30,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:24:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:30,392 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:30,465 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-12-06 20:24:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:24:30,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 20:24:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:30,467 INFO L225 Difference]: With dead ends: 55 [2021-12-06 20:24:30,467 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 20:24:30,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:30,468 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:30,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 20:24:30,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-06 20:24:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-12-06 20:24:30,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 13 [2021-12-06 20:24:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:30,472 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-12-06 20:24:30,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-12-06 20:24:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:24:30,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:30,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:30,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 20:24:30,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:30,674 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2021-12-06 20:24:30,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:30,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229336704] [2021-12-06 20:24:30,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:30,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:30,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:30,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:30,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 20:24:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:24:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:30,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:30,773 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-06 20:24:30,774 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 1 case distinctions, treesize of input 12 treesize of output 23 [2021-12-06 20:24:30,781 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 48 treesize of output 46 [2021-12-06 20:24:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:30,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:30,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:30,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229336704] [2021-12-06 20:24:30,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229336704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:30,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:30,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:30,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836122898] [2021-12-06 20:24:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:30,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:24:30,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:24:30,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:30,837 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:31,030 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-12-06 20:24:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:24:31,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 20:24:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:31,031 INFO L225 Difference]: With dead ends: 109 [2021-12-06 20:24:31,031 INFO L226 Difference]: Without dead ends: 109 [2021-12-06 20:24:31,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:24:31,032 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:31,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 144 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:24:31,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-06 20:24:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2021-12-06 20:24:31,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 78 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2021-12-06 20:24:31,037 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 13 [2021-12-06 20:24:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:31,037 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2021-12-06 20:24:31,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2021-12-06 20:24:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 20:24:31,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:31,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:31,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 20:24:31,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:31,239 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1811674902, now seen corresponding path program 1 times [2021-12-06 20:24:31,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:31,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301692015] [2021-12-06 20:24:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:31,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:31,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:31,245 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:31,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 20:24:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:24:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:31,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:31,397 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-06 20:24:31,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-12-06 20:24:31,404 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 122 treesize of output 118 [2021-12-06 20:24:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:31,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:31,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:31,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301692015] [2021-12-06 20:24:31,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301692015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:31,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:31,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:31,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725522703] [2021-12-06 20:24:31,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:31,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:24:31,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:31,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:24:31,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:31,538 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:31,556 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-12-06 20:24:31,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:24:31,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 20:24:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:31,558 INFO L225 Difference]: With dead ends: 81 [2021-12-06 20:24:31,558 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 20:24:31,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:24:31,559 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:31,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2021-12-06 20:24:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 20:24:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-12-06 20:24:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-12-06 20:24:31,563 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 13 [2021-12-06 20:24:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:31,563 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-12-06 20:24:31,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-12-06 20:24:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 20:24:31,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:31,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:31,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:31,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:31,765 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:31,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1046384445, now seen corresponding path program 1 times [2021-12-06 20:24:31,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:31,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744961730] [2021-12-06 20:24:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:31,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:31,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:31,770 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:31,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 20:24:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:31,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:24:31,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:31,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:31,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744961730] [2021-12-06 20:24:31,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744961730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:31,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:31,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:31,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745322266] [2021-12-06 20:24:31,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:31,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:31,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:31,902 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:31,998 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2021-12-06 20:24:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:31,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 20:24:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:31,999 INFO L225 Difference]: With dead ends: 130 [2021-12-06 20:24:31,999 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 20:24:32,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:32,000 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 71 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:32,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 127 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:32,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 20:24:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 91. [2021-12-06 20:24:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 80 states have (on average 1.3625) internal successors, (109), 90 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-12-06 20:24:32,004 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 16 [2021-12-06 20:24:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:32,004 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-12-06 20:24:32,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-12-06 20:24:32,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 20:24:32,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:32,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:32,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 20:24:32,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:32,207 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:32,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1046385311, now seen corresponding path program 1 times [2021-12-06 20:24:32,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:32,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436587332] [2021-12-06 20:24:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:32,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:32,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:32,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:32,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 20:24:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:24:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:32,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:32,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:32,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436587332] [2021-12-06 20:24:32,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436587332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:32,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:32,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:32,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753699077] [2021-12-06 20:24:32,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:32,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:32,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:32,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:32,338 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:32,427 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2021-12-06 20:24:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 20:24:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:32,428 INFO L225 Difference]: With dead ends: 89 [2021-12-06 20:24:32,428 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 20:24:32,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:32,429 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:32,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 20:24:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-06 20:24:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.3375) internal successors, (107), 88 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2021-12-06 20:24:32,432 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 16 [2021-12-06 20:24:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:32,432 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2021-12-06 20:24:32,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2021-12-06 20:24:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 20:24:32,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:32,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:32,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 20:24:32,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:32,634 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:32,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1046385312, now seen corresponding path program 1 times [2021-12-06 20:24:32,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:32,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956344892] [2021-12-06 20:24:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:32,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:32,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:32,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:32,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 20:24:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:32,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:24:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:32,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:32,997 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 25 treesize of output 21 [2021-12-06 20:24:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:33,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:33,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956344892] [2021-12-06 20:24:33,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956344892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:33,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:33,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-06 20:24:33,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27193993] [2021-12-06 20:24:33,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:33,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:24:33,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:33,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:24:33,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:24:33,074 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:33,835 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2021-12-06 20:24:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:24:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 20:24:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:33,836 INFO L225 Difference]: With dead ends: 163 [2021-12-06 20:24:33,836 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 20:24:33,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:24:33,837 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 211 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:33,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 122 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:24:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 20:24:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 94. [2021-12-06 20:24:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.3529411764705883) internal successors, (115), 93 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2021-12-06 20:24:33,841 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 16 [2021-12-06 20:24:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:33,841 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2021-12-06 20:24:33,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2021-12-06 20:24:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 20:24:33,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:33,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:33,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 20:24:34,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:34,044 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:34,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:34,045 INFO L85 PathProgramCache]: Analyzing trace with hash 35267195, now seen corresponding path program 1 times [2021-12-06 20:24:34,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:34,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937072402] [2021-12-06 20:24:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:34,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:34,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:34,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:34,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 20:24:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:24:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:34,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:34,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937072402] [2021-12-06 20:24:34,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937072402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:34,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:34,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-06 20:24:34,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719421057] [2021-12-06 20:24:34,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:34,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 20:24:34,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:34,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 20:24:34,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:24:34,280 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:34,512 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2021-12-06 20:24:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:24:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 20:24:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:34,514 INFO L225 Difference]: With dead ends: 142 [2021-12-06 20:24:34,514 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 20:24:34,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:24:34,514 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 296 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:34,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 164 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 20:24:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 83. [2021-12-06 20:24:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 82 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-12-06 20:24:34,517 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 16 [2021-12-06 20:24:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:34,517 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-12-06 20:24:34,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-12-06 20:24:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 20:24:34,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:34,518 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:34,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 20:24:34,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:34,719 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2021-12-06 20:24:34,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:34,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193349173] [2021-12-06 20:24:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:34,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:34,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:34,724 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:34,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 20:24:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:24:34,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:34,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:34,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193349173] [2021-12-06 20:24:34,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193349173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:34,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:34,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 20:24:34,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129547349] [2021-12-06 20:24:34,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:34,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:24:34,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:34,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:24:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:24:34,898 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:34,951 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-12-06 20:24:34,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:24:34,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 20:24:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:34,953 INFO L225 Difference]: With dead ends: 113 [2021-12-06 20:24:34,953 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 20:24:34,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:24:34,954 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 100 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:34,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 197 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 20:24:34,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-12-06 20:24:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 86 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2021-12-06 20:24:34,956 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 17 [2021-12-06 20:24:34,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:34,956 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2021-12-06 20:24:34,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2021-12-06 20:24:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 20:24:34,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:34,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:34,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 20:24:35,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:35,158 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1921793684, now seen corresponding path program 1 times [2021-12-06 20:24:35,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:35,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890741049] [2021-12-06 20:24:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:35,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:35,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:35,159 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:35,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 20:24:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:24:35,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:35,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:35,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:35,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890741049] [2021-12-06 20:24:35,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890741049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:35,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:35,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:35,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483058868] [2021-12-06 20:24:35,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:35,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:35,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:35,257 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:35,292 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2021-12-06 20:24:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:35,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 20:24:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:35,293 INFO L225 Difference]: With dead ends: 89 [2021-12-06 20:24:35,293 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 20:24:35,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:35,294 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:35,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 72 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 20:24:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-12-06 20:24:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 86 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-12-06 20:24:35,298 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 17 [2021-12-06 20:24:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:35,298 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-12-06 20:24:35,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-12-06 20:24:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 20:24:35,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:35,299 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:35,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 20:24:35,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:35,500 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2021-12-06 20:24:35,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:35,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243329420] [2021-12-06 20:24:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:35,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:35,505 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:35,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 20:24:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:35,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:24:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:35,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:35,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:35,634 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-06 20:24:35,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-12-06 20:24:35,640 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 114 treesize of output 110 [2021-12-06 20:24:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:35,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:36,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:24:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:36,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:36,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243329420] [2021-12-06 20:24:36,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243329420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:36,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:36,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-06 20:24:36,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756748279] [2021-12-06 20:24:36,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:36,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:24:36,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:24:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:24:36,420 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:36,968 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2021-12-06 20:24:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:24:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 20:24:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:36,970 INFO L225 Difference]: With dead ends: 120 [2021-12-06 20:24:36,970 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 20:24:36,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:24:36,970 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 179 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:36,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 160 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 15 Unchecked, 0.5s Time] [2021-12-06 20:24:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 20:24:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-12-06 20:24:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.313953488372093) internal successors, (113), 94 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2021-12-06 20:24:36,973 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 17 [2021-12-06 20:24:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:36,973 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2021-12-06 20:24:36,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2021-12-06 20:24:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 20:24:36,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:36,974 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:36,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:37,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:37,175 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash -472171212, now seen corresponding path program 2 times [2021-12-06 20:24:37,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:37,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752808808] [2021-12-06 20:24:37,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:24:37,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:37,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:37,180 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:37,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 20:24:37,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:24:37,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:24:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:24:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:37,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:37,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:37,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:37,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 20:24:37,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 20:24:37,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 65 [2021-12-06 20:24:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:37,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:38,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:24:38,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:24:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:38,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752808808] [2021-12-06 20:24:38,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752808808] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:38,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:38,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-06 20:24:38,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628586914] [2021-12-06 20:24:38,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:38,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:24:38,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:24:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:24:38,611 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:40,552 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2021-12-06 20:24:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 20:24:40,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 20:24:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:40,554 INFO L225 Difference]: With dead ends: 127 [2021-12-06 20:24:40,554 INFO L226 Difference]: Without dead ends: 127 [2021-12-06 20:24:40,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:24:40,555 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:40,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 274 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2021-12-06 20:24:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-06 20:24:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-06 20:24:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 126 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-12-06 20:24:40,558 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 19 [2021-12-06 20:24:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:40,558 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-12-06 20:24:40,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-12-06 20:24:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 20:24:40,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:40,558 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] [2021-12-06 20:24:40,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 20:24:40,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:40,759 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:40,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1835293711, now seen corresponding path program 1 times [2021-12-06 20:24:40,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:40,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225646857] [2021-12-06 20:24:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:40,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:40,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:40,762 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:40,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 20:24:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:24:40,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:40,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:40,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:40,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225646857] [2021-12-06 20:24:40,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225646857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:40,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:40,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:40,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125691118] [2021-12-06 20:24:40,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:40,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:40,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:40,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:40,843 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:40,914 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2021-12-06 20:24:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:40,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 20:24:40,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:40,916 INFO L225 Difference]: With dead ends: 126 [2021-12-06 20:24:40,916 INFO L226 Difference]: Without dead ends: 126 [2021-12-06 20:24:40,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:40,916 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:40,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-06 20:24:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-12-06 20:24:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 125 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2021-12-06 20:24:40,919 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 21 [2021-12-06 20:24:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:40,919 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2021-12-06 20:24:40,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2021-12-06 20:24:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 20:24:40,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:40,920 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] [2021-12-06 20:24:40,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 20:24:41,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:41,121 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:41,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:41,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1835293710, now seen corresponding path program 1 times [2021-12-06 20:24:41,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:41,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342682609] [2021-12-06 20:24:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:41,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:41,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:41,126 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:41,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 20:24:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:41,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 20:24:41,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:41,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:41,612 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 25 treesize of output 21 [2021-12-06 20:24:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:41,754 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:41,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342682609] [2021-12-06 20:24:41,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342682609] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:41,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:41,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-06 20:24:41,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216882425] [2021-12-06 20:24:41,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:41,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:24:41,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:41,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:24:41,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:24:41,756 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:42,542 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2021-12-06 20:24:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:24:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 20:24:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:42,544 INFO L225 Difference]: With dead ends: 208 [2021-12-06 20:24:42,544 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 20:24:42,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:24:42,545 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 375 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:42,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 129 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:24:42,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 20:24:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 129. [2021-12-06 20:24:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.2892561983471074) internal successors, (156), 128 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2021-12-06 20:24:42,548 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 21 [2021-12-06 20:24:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:42,548 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2021-12-06 20:24:42,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2021-12-06 20:24:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 20:24:42,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:42,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:42,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 20:24:42,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:42,750 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:42,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1059572912, now seen corresponding path program 1 times [2021-12-06 20:24:42,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:42,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573375104] [2021-12-06 20:24:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:42,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:42,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:42,755 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:42,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 20:24:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:24:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:24:42,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:42,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573375104] [2021-12-06 20:24:42,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573375104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:42,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:42,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:24:42,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202168120] [2021-12-06 20:24:42,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:42,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:24:42,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:42,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:24:42,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:42,851 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:42,906 INFO L93 Difference]: Finished difference Result 158 states and 189 transitions. [2021-12-06 20:24:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:24:42,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 20:24:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:42,908 INFO L225 Difference]: With dead ends: 158 [2021-12-06 20:24:42,908 INFO L226 Difference]: Without dead ends: 158 [2021-12-06 20:24:42,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:24:42,909 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 54 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:42,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 128 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-06 20:24:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 147. [2021-12-06 20:24:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 139 states have (on average 1.316546762589928) internal successors, (183), 146 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 183 transitions. [2021-12-06 20:24:42,912 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 183 transitions. Word has length 22 [2021-12-06 20:24:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:42,912 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 183 transitions. [2021-12-06 20:24:42,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 183 transitions. [2021-12-06 20:24:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 20:24:42,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:42,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:42,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 20:24:43,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:43,113 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1546450642, now seen corresponding path program 1 times [2021-12-06 20:24:43,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:43,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164940449] [2021-12-06 20:24:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:43,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:43,119 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:43,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 20:24:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:24:43,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:43,210 INFO L354 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2021-12-06 20:24:43,210 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 2 case distinctions, treesize of input 12 treesize of output 33 [2021-12-06 20:24:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:24:43,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:43,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164940449] [2021-12-06 20:24:43,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164940449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:43,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:43,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:43,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963496607] [2021-12-06 20:24:43,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:43,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:43,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:43,250 INFO L87 Difference]: Start difference. First operand 147 states and 183 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:43,325 INFO L93 Difference]: Finished difference Result 146 states and 181 transitions. [2021-12-06 20:24:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 20:24:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:43,326 INFO L225 Difference]: With dead ends: 146 [2021-12-06 20:24:43,326 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 20:24:43,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:43,327 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:43,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 51 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 20:24:43,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-12-06 20:24:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 145 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 181 transitions. [2021-12-06 20:24:43,330 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 181 transitions. Word has length 22 [2021-12-06 20:24:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:43,330 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 181 transitions. [2021-12-06 20:24:43,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 181 transitions. [2021-12-06 20:24:43,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 20:24:43,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:43,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:43,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 20:24:43,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:43,532 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:43,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1546450643, now seen corresponding path program 1 times [2021-12-06 20:24:43,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:43,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550041363] [2021-12-06 20:24:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:43,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:43,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:43,537 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:43,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 20:24:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:43,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:24:43,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:43,653 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-12-06 20:24:43,653 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 2 case distinctions, treesize of input 12 treesize of output 27 [2021-12-06 20:24:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:24:43,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:43,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:43,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550041363] [2021-12-06 20:24:43,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550041363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:43,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:43,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:43,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528109983] [2021-12-06 20:24:43,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:43,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:24:43,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:24:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:43,731 INFO L87 Difference]: Start difference. First operand 146 states and 181 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:43,969 INFO L93 Difference]: Finished difference Result 250 states and 315 transitions. [2021-12-06 20:24:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:24:43,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 20:24:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:43,971 INFO L225 Difference]: With dead ends: 250 [2021-12-06 20:24:43,971 INFO L226 Difference]: Without dead ends: 250 [2021-12-06 20:24:43,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:24:43,971 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:43,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 121 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:24:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-06 20:24:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 202. [2021-12-06 20:24:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 195 states have (on average 1.323076923076923) internal successors, (258), 201 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 258 transitions. [2021-12-06 20:24:43,976 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 258 transitions. Word has length 22 [2021-12-06 20:24:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:43,976 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 258 transitions. [2021-12-06 20:24:43,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 258 transitions. [2021-12-06 20:24:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 20:24:43,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:43,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:43,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 20:24:44,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:44,178 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash 728802193, now seen corresponding path program 1 times [2021-12-06 20:24:44,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:44,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050272571] [2021-12-06 20:24:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:44,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:44,183 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:44,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 20:24:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:44,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:24:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:44,372 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-12-06 20:24:44,372 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 2 case distinctions, treesize of input 14 treesize of output 29 [2021-12-06 20:24:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:24:44,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:44,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:44,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050272571] [2021-12-06 20:24:44,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050272571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:44,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:44,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:44,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234363344] [2021-12-06 20:24:44,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:44,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:24:44,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:24:44,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:44,559 INFO L87 Difference]: Start difference. First operand 202 states and 258 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:44,578 INFO L93 Difference]: Finished difference Result 229 states and 298 transitions. [2021-12-06 20:24:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:24:44,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 20:24:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:44,580 INFO L225 Difference]: With dead ends: 229 [2021-12-06 20:24:44,580 INFO L226 Difference]: Without dead ends: 229 [2021-12-06 20:24:44,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:24:44,580 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:44,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-06 20:24:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-06 20:24:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2021-12-06 20:24:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.3383084577114428) internal successors, (269), 207 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 269 transitions. [2021-12-06 20:24:44,585 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 269 transitions. Word has length 22 [2021-12-06 20:24:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:44,585 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 269 transitions. [2021-12-06 20:24:44,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 269 transitions. [2021-12-06 20:24:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 20:24:44,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:44,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:44,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 20:24:44,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:44,787 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:44,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash 88962737, now seen corresponding path program 1 times [2021-12-06 20:24:44,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:44,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617927933] [2021-12-06 20:24:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:44,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:44,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:44,792 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:44,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 20:24:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:44,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:24:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:24:44,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:44,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:44,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617927933] [2021-12-06 20:24:44,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617927933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:44,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:44,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:44,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957188362] [2021-12-06 20:24:44,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:44,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:24:44,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:24:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:44,966 INFO L87 Difference]: Start difference. First operand 208 states and 269 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:44,975 INFO L93 Difference]: Finished difference Result 216 states and 273 transitions. [2021-12-06 20:24:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:24:44,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 20:24:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:44,976 INFO L225 Difference]: With dead ends: 216 [2021-12-06 20:24:44,976 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 20:24:44,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:44,977 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:44,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 20:24:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2021-12-06 20:24:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.3134328358208955) internal successors, (264), 207 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 264 transitions. [2021-12-06 20:24:44,981 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 264 transitions. Word has length 24 [2021-12-06 20:24:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:44,981 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 264 transitions. [2021-12-06 20:24:44,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 264 transitions. [2021-12-06 20:24:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 20:24:44,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:44,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:44,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-06 20:24:45,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:45,182 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:45,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash -747793046, now seen corresponding path program 1 times [2021-12-06 20:24:45,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:45,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614741980] [2021-12-06 20:24:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:45,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:45,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:45,187 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:45,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 20:24:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:24:45,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:24:45,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:24:45,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:45,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614741980] [2021-12-06 20:24:45,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614741980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:45,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:45,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-06 20:24:45,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629718543] [2021-12-06 20:24:45,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:45,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 20:24:45,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:45,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 20:24:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:24:45,448 INFO L87 Difference]: Start difference. First operand 208 states and 264 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:45,519 INFO L93 Difference]: Finished difference Result 221 states and 269 transitions. [2021-12-06 20:24:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:24:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 20:24:45,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:45,520 INFO L225 Difference]: With dead ends: 221 [2021-12-06 20:24:45,520 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 20:24:45,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:24:45,521 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 106 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:45,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 250 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 20:24:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 204. [2021-12-06 20:24:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 197 states have (on average 1.299492385786802) internal successors, (256), 203 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 256 transitions. [2021-12-06 20:24:45,525 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 256 transitions. Word has length 25 [2021-12-06 20:24:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:45,525 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 256 transitions. [2021-12-06 20:24:45,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 256 transitions. [2021-12-06 20:24:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 20:24:45,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:45,526 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:45,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-06 20:24:45,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:45,727 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash -528938328, now seen corresponding path program 1 times [2021-12-06 20:24:45,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:45,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300487336] [2021-12-06 20:24:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:45,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:45,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:45,728 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:45,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 20:24:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:45,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 20:24:45,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:45,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:46,024 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:46,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300487336] [2021-12-06 20:24:46,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300487336] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:46,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:46,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-12-06 20:24:46,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168945160] [2021-12-06 20:24:46,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:46,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 20:24:46,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 20:24:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:24:46,025 INFO L87 Difference]: Start difference. First operand 204 states and 256 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:46,311 INFO L93 Difference]: Finished difference Result 267 states and 333 transitions. [2021-12-06 20:24:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:24:46,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 20:24:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:46,312 INFO L225 Difference]: With dead ends: 267 [2021-12-06 20:24:46,313 INFO L226 Difference]: Without dead ends: 267 [2021-12-06 20:24:46,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:24:46,313 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 175 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:46,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 330 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:24:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-06 20:24:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2021-12-06 20:24:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 234 states have (on average 1.3247863247863247) internal successors, (310), 240 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 310 transitions. [2021-12-06 20:24:46,318 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 310 transitions. Word has length 25 [2021-12-06 20:24:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:46,319 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 310 transitions. [2021-12-06 20:24:46,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 310 transitions. [2021-12-06 20:24:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 20:24:46,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:46,319 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:46,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:46,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:46,520 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1117279393, now seen corresponding path program 2 times [2021-12-06 20:24:46,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:46,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943982724] [2021-12-06 20:24:46,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:24:46,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:46,521 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:46,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 20:24:46,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:24:46,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:24:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 20:24:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:46,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:24:46,635 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-06 20:24:46,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-12-06 20:24:46,642 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 56 treesize of output 54 [2021-12-06 20:24:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:47,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:48,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:24:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:48,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:48,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943982724] [2021-12-06 20:24:48,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943982724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:48,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:48,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-06 20:24:48,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615700762] [2021-12-06 20:24:48,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:48,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:24:48,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:48,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:24:48,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:24:48,354 INFO L87 Difference]: Start difference. First operand 241 states and 310 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:51,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:51,964 INFO L93 Difference]: Finished difference Result 471 states and 608 transitions. [2021-12-06 20:24:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 20:24:51,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 20:24:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:51,967 INFO L225 Difference]: With dead ends: 471 [2021-12-06 20:24:51,967 INFO L226 Difference]: Without dead ends: 471 [2021-12-06 20:24:51,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2021-12-06 20:24:51,968 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 374 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:51,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 396 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 340 Invalid, 0 Unknown, 47 Unchecked, 2.4s Time] [2021-12-06 20:24:51,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-12-06 20:24:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 273. [2021-12-06 20:24:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 266 states have (on average 1.3157894736842106) internal successors, (350), 272 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 350 transitions. [2021-12-06 20:24:51,974 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 350 transitions. Word has length 25 [2021-12-06 20:24:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:51,974 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 350 transitions. [2021-12-06 20:24:51,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:51,974 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 350 transitions. [2021-12-06 20:24:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 20:24:51,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:51,975 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] [2021-12-06 20:24:51,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-06 20:24:52,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:52,176 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:52,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1840804201, now seen corresponding path program 1 times [2021-12-06 20:24:52,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:52,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875241261] [2021-12-06 20:24:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:52,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:52,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:52,182 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:52,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 20:24:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:52,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:24:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:52,368 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-12-06 20:24:52,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2021-12-06 20:24:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:24:52,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:52,574 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:52,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875241261] [2021-12-06 20:24:52,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875241261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:52,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:52,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:52,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605880191] [2021-12-06 20:24:52,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:52,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:24:52,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:52,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:24:52,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:52,575 INFO L87 Difference]: Start difference. First operand 273 states and 350 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:52,593 INFO L93 Difference]: Finished difference Result 323 states and 418 transitions. [2021-12-06 20:24:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:24:52,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 20:24:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:52,594 INFO L225 Difference]: With dead ends: 323 [2021-12-06 20:24:52,594 INFO L226 Difference]: Without dead ends: 323 [2021-12-06 20:24:52,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:24:52,595 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:52,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-06 20:24:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-06 20:24:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 227. [2021-12-06 20:24:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 220 states have (on average 1.3363636363636364) internal successors, (294), 226 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 294 transitions. [2021-12-06 20:24:52,599 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 294 transitions. Word has length 26 [2021-12-06 20:24:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:52,599 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 294 transitions. [2021-12-06 20:24:52,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 294 transitions. [2021-12-06 20:24:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 20:24:52,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:52,600 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] [2021-12-06 20:24:52,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:52,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:52,801 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:52,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1854162937, now seen corresponding path program 1 times [2021-12-06 20:24:52,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:52,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644654296] [2021-12-06 20:24:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:52,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:52,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:52,806 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:52,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 20:24:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:53,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 20:24:53,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:53,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:53,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:53,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644654296] [2021-12-06 20:24:53,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644654296] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:53,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:53,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-06 20:24:53,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817113343] [2021-12-06 20:24:53,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:53,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 20:24:53,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:53,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 20:24:53,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:24:53,208 INFO L87 Difference]: Start difference. First operand 227 states and 294 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:53,442 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2021-12-06 20:24:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:24:53,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 20:24:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:53,444 INFO L225 Difference]: With dead ends: 234 [2021-12-06 20:24:53,444 INFO L226 Difference]: Without dead ends: 234 [2021-12-06 20:24:53,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:24:53,445 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:53,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 179 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-06 20:24:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 188. [2021-12-06 20:24:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.2912087912087913) internal successors, (235), 187 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 235 transitions. [2021-12-06 20:24:53,449 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 235 transitions. Word has length 27 [2021-12-06 20:24:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:53,449 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 235 transitions. [2021-12-06 20:24:53,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 235 transitions. [2021-12-06 20:24:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 20:24:53,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:53,449 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] [2021-12-06 20:24:53,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:53,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:53,650 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:53,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1314778955, now seen corresponding path program 1 times [2021-12-06 20:24:53,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:53,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063117975] [2021-12-06 20:24:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:53,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:53,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:53,655 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:53,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 20:24:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:53,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:24:53,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:24:54,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:54,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063117975] [2021-12-06 20:24:54,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063117975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:54,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:54,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:54,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074210107] [2021-12-06 20:24:54,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:54,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:24:54,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:24:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:54,898 INFO L87 Difference]: Start difference. First operand 188 states and 235 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:54,916 INFO L93 Difference]: Finished difference Result 192 states and 236 transitions. [2021-12-06 20:24:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:24:54,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 20:24:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:54,918 INFO L225 Difference]: With dead ends: 192 [2021-12-06 20:24:54,918 INFO L226 Difference]: Without dead ends: 190 [2021-12-06 20:24:54,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:54,918 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:54,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 104 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2021-12-06 20:24:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-06 20:24:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-12-06 20:24:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.2802197802197801) internal successors, (233), 187 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 233 transitions. [2021-12-06 20:24:54,921 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 233 transitions. Word has length 28 [2021-12-06 20:24:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:54,921 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 233 transitions. [2021-12-06 20:24:54,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 233 transitions. [2021-12-06 20:24:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 20:24:54,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:54,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:54,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 20:24:55,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:55,123 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:55,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1314778088, now seen corresponding path program 1 times [2021-12-06 20:24:55,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:55,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896952222] [2021-12-06 20:24:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:55,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:55,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:55,128 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:55,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-06 20:24:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 20:24:55,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:24:55,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:24:55,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:55,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896952222] [2021-12-06 20:24:55,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896952222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:55,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:55,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 20:24:55,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871812348] [2021-12-06 20:24:55,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:55,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:24:55,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:24:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:24:55,455 INFO L87 Difference]: Start difference. First operand 188 states and 233 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:55,533 INFO L93 Difference]: Finished difference Result 266 states and 322 transitions. [2021-12-06 20:24:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:24:55,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 20:24:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:55,535 INFO L225 Difference]: With dead ends: 266 [2021-12-06 20:24:55,535 INFO L226 Difference]: Without dead ends: 262 [2021-12-06 20:24:55,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:24:55,535 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:55,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 167 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:55,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-06 20:24:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 249. [2021-12-06 20:24:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 248 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 308 transitions. [2021-12-06 20:24:55,542 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 308 transitions. Word has length 28 [2021-12-06 20:24:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:55,542 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 308 transitions. [2021-12-06 20:24:55,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 308 transitions. [2021-12-06 20:24:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 20:24:55,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:55,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:55,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:55,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:55,743 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1252738474, now seen corresponding path program 1 times [2021-12-06 20:24:55,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:55,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717671030] [2021-12-06 20:24:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:55,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:55,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:55,745 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:55,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 20:24:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 20:24:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:24:55,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:24:56,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:56,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717671030] [2021-12-06 20:24:56,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717671030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:56,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:56,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-06 20:24:56,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965621029] [2021-12-06 20:24:56,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:56,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 20:24:56,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 20:24:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:24:56,118 INFO L87 Difference]: Start difference. First operand 249 states and 308 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:56,382 INFO L93 Difference]: Finished difference Result 327 states and 397 transitions. [2021-12-06 20:24:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:24:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 20:24:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:56,384 INFO L225 Difference]: With dead ends: 327 [2021-12-06 20:24:56,384 INFO L226 Difference]: Without dead ends: 323 [2021-12-06 20:24:56,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:24:56,384 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 184 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:56,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 230 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-06 20:24:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 249. [2021-12-06 20:24:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 248 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 308 transitions. [2021-12-06 20:24:56,389 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 308 transitions. Word has length 28 [2021-12-06 20:24:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:56,389 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 308 transitions. [2021-12-06 20:24:56,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 308 transitions. [2021-12-06 20:24:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 20:24:56,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:56,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:56,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-06 20:24:56,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:56,590 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:56,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1138703979, now seen corresponding path program 2 times [2021-12-06 20:24:56,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026632818] [2021-12-06 20:24:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:24:56,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:56,595 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:56,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-06 20:24:56,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:24:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:24:56,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:24:56,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:56,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:57,230 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 27 treesize of output 23 [2021-12-06 20:24:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:57,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:24:57,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026632818] [2021-12-06 20:24:57,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026632818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:57,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:57,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-06 20:24:57,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629806659] [2021-12-06 20:24:57,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:57,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:24:57,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:24:57,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:24:57,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:24:57,549 INFO L87 Difference]: Start difference. First operand 249 states and 308 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:59,527 INFO L93 Difference]: Finished difference Result 676 states and 817 transitions. [2021-12-06 20:24:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:24:59,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 20:24:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:59,531 INFO L225 Difference]: With dead ends: 676 [2021-12-06 20:24:59,531 INFO L226 Difference]: Without dead ends: 676 [2021-12-06 20:24:59,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-12-06 20:24:59,531 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1099 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:59,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 355 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:24:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-12-06 20:24:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 263. [2021-12-06 20:24:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 257 states have (on average 1.284046692607004) internal successors, (330), 262 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 330 transitions. [2021-12-06 20:24:59,537 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 330 transitions. Word has length 29 [2021-12-06 20:24:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:59,537 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 330 transitions. [2021-12-06 20:24:59,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 330 transitions. [2021-12-06 20:24:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 20:24:59,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:59,538 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] [2021-12-06 20:24:59,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-06 20:24:59,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:24:59,738 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:24:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1019375167, now seen corresponding path program 1 times [2021-12-06 20:24:59,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:24:59,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021820158] [2021-12-06 20:24:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:59,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:24:59,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:24:59,740 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:24:59,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-06 20:24:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 20:24:59,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:25:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:25:01,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:25:01,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:25:01,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021820158] [2021-12-06 20:25:01,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021820158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:25:01,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:25:01,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:25:01,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318667777] [2021-12-06 20:25:01,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:25:01,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:25:01,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:25:01,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:25:01,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:25:01,095 INFO L87 Difference]: Start difference. First operand 263 states and 330 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:25:01,099 INFO L93 Difference]: Finished difference Result 262 states and 329 transitions. [2021-12-06 20:25:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:25:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 20:25:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:25:01,101 INFO L225 Difference]: With dead ends: 262 [2021-12-06 20:25:01,101 INFO L226 Difference]: Without dead ends: 234 [2021-12-06 20:25:01,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:25:01,101 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:25:01,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 89 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-06 20:25:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-06 20:25:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-12-06 20:25:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.2763157894736843) internal successors, (291), 232 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 291 transitions. [2021-12-06 20:25:01,105 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 291 transitions. Word has length 31 [2021-12-06 20:25:01,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:25:01,105 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 291 transitions. [2021-12-06 20:25:01,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:01,105 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 291 transitions. [2021-12-06 20:25:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 20:25:01,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:25:01,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:25:01,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-12-06 20:25:01,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:25:01,307 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:25:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:25:01,308 INFO L85 PathProgramCache]: Analyzing trace with hash -112944909, now seen corresponding path program 2 times [2021-12-06 20:25:01,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:25:01,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763244747] [2021-12-06 20:25:01,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:25:01,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:25:01,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:25:01,312 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:25:01,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-06 20:25:01,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:25:01,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:25:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:25:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:25:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:25:01,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:25:02,146 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 27 treesize of output 23 [2021-12-06 20:25:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:25:02,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:25:02,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763244747] [2021-12-06 20:25:02,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763244747] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:25:02,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:25:02,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-06 20:25:02,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132963217] [2021-12-06 20:25:02,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:25:02,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:25:02,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:25:02,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:25:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:25:02,366 INFO L87 Difference]: Start difference. First operand 233 states and 291 transitions. Second operand has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:04,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:25:04,085 INFO L93 Difference]: Finished difference Result 773 states and 989 transitions. [2021-12-06 20:25:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 20:25:04,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 20:25:04,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:25:04,088 INFO L225 Difference]: With dead ends: 773 [2021-12-06 20:25:04,089 INFO L226 Difference]: Without dead ends: 773 [2021-12-06 20:25:04,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:25:04,089 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 627 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:25:04,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 239 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 20:25:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-12-06 20:25:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 272. [2021-12-06 20:25:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.2771535580524345) internal successors, (341), 271 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 341 transitions. [2021-12-06 20:25:04,095 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 341 transitions. Word has length 32 [2021-12-06 20:25:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:25:04,096 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 341 transitions. [2021-12-06 20:25:04,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 341 transitions. [2021-12-06 20:25:04,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 20:25:04,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:25:04,096 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:25:04,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-12-06 20:25:04,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:25:04,297 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:25:04,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:25:04,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1409463453, now seen corresponding path program 3 times [2021-12-06 20:25:04,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:25:04,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780350237] [2021-12-06 20:25:04,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:25:04,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:25:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:25:04,302 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:25:04,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-06 20:25:04,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 20:25:04,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:25:04,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 20:25:04,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:25:04,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:25:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:25:04,556 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-06 20:25:04,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-12-06 20:25:04,562 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 52 treesize of output 50 [2021-12-06 20:25:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 20:25:04,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:25:06,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:25:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 20:25:06,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:25:06,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780350237] [2021-12-06 20:25:06,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780350237] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:25:06,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:25:06,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-06 20:25:06,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490109828] [2021-12-06 20:25:06,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:25:06,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:25:06,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:25:06,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:25:06,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-12-06 20:25:06,349 INFO L87 Difference]: Start difference. First operand 272 states and 341 transitions. Second operand has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:09,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:25:12,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:25:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:25:13,617 INFO L93 Difference]: Finished difference Result 592 states and 721 transitions. [2021-12-06 20:25:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 20:25:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 20:25:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:25:13,621 INFO L225 Difference]: With dead ends: 592 [2021-12-06 20:25:13,621 INFO L226 Difference]: Without dead ends: 592 [2021-12-06 20:25:13,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:25:13,621 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 273 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:25:13,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 323 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 416 Invalid, 2 Unknown, 22 Unchecked, 5.9s Time] [2021-12-06 20:25:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-12-06 20:25:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 357. [2021-12-06 20:25:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.3125) internal successors, (462), 356 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 462 transitions. [2021-12-06 20:25:13,628 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 462 transitions. Word has length 33 [2021-12-06 20:25:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:25:13,628 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 462 transitions. [2021-12-06 20:25:13,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 462 transitions. [2021-12-06 20:25:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 20:25:13,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:25:13,628 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-12-06 20:25:13,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-06 20:25:13,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:25:13,830 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:25:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:25:13,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1249695552, now seen corresponding path program 3 times [2021-12-06 20:25:13,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:25:13,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781028402] [2021-12-06 20:25:13,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:25:13,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:25:13,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:25:13,835 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:25:13,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-06 20:25:13,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 20:25:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:25:14,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:25:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:25:14,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:25:14,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:25:14,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:25:14,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 20:25:14,050 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 20:25:14,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 67 [2021-12-06 20:25:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:25:14,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:25:16,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:25:16,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:25:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:25:16,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:25:16,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781028402] [2021-12-06 20:25:16,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781028402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:25:16,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:25:16,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-06 20:25:16,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103311252] [2021-12-06 20:25:16,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:25:16,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 20:25:16,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:25:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 20:25:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-12-06 20:25:16,921 INFO L87 Difference]: Start difference. First operand 357 states and 462 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:25:28,084 INFO L93 Difference]: Finished difference Result 421 states and 542 transitions. [2021-12-06 20:25:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 20:25:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 20:25:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:25:28,087 INFO L225 Difference]: With dead ends: 421 [2021-12-06 20:25:28,087 INFO L226 Difference]: Without dead ends: 421 [2021-12-06 20:25:28,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=669, Invalid=1493, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 20:25:28,088 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:25:28,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 353 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2021-12-06 20:25:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-06 20:25:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2021-12-06 20:25:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 416 states have (on average 1.3028846153846154) internal successors, (542), 420 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 542 transitions. [2021-12-06 20:25:28,093 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 542 transitions. Word has length 35 [2021-12-06 20:25:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:25:28,093 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 542 transitions. [2021-12-06 20:25:28,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 542 transitions. [2021-12-06 20:25:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 20:25:28,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:25:28,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:25:28,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-12-06 20:25:28,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:25:28,295 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:25:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:25:28,296 INFO L85 PathProgramCache]: Analyzing trace with hash -524293744, now seen corresponding path program 3 times [2021-12-06 20:25:28,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:25:28,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868609617] [2021-12-06 20:25:28,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:25:28,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:25:28,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:25:28,300 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:25:28,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-06 20:25:28,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 20:25:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:25:28,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 20:25:28,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:25:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:25:28,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:25:28,567 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:25:28,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-12-06 20:25:28,585 INFO L354 Elim1Store]: treesize reduction 2, result has 75.0 percent of original size [2021-12-06 20:25:28,585 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 77 treesize of output 79 [2021-12-06 20:25:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:25:29,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:25:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:25:32,601 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:25:32,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868609617] [2021-12-06 20:25:32,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868609617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:25:32,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:25:32,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-06 20:25:32,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456630499] [2021-12-06 20:25:32,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:25:32,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 20:25:32,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:25:32,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 20:25:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-12-06 20:25:32,602 INFO L87 Difference]: Start difference. First operand 421 states and 542 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:25:37,273 INFO L93 Difference]: Finished difference Result 764 states and 989 transitions. [2021-12-06 20:25:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 20:25:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 20:25:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:25:37,277 INFO L225 Difference]: With dead ends: 764 [2021-12-06 20:25:37,277 INFO L226 Difference]: Without dead ends: 729 [2021-12-06 20:25:37,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 20:25:37,278 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 426 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:25:37,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 292 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 20:25:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-12-06 20:25:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 662. [2021-12-06 20:25:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 657 states have (on average 1.3242009132420092) internal successors, (870), 661 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 870 transitions. [2021-12-06 20:25:37,286 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 870 transitions. Word has length 40 [2021-12-06 20:25:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:25:37,287 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 870 transitions. [2021-12-06 20:25:37,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 870 transitions. [2021-12-06 20:25:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 20:25:37,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:25:37,287 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:25:37,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-12-06 20:25:37,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:25:37,488 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:25:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:25:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1396579989, now seen corresponding path program 3 times [2021-12-06 20:25:37,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:25:37,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966133014] [2021-12-06 20:25:37,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:25:37,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:25:37,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:25:37,494 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:25:37,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-06 20:25:37,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 20:25:37,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:25:37,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 20:25:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:25:37,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:25:37,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:25:37,794 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-06 20:25:37,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-12-06 20:25:37,800 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 122 treesize of output 118 [2021-12-06 20:25:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:25:38,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:25:42,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:25:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:25:42,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:25:42,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966133014] [2021-12-06 20:25:42,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966133014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:25:42,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:25:42,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-12-06 20:25:42,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15794723] [2021-12-06 20:25:42,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:25:42,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 20:25:42,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:25:42,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 20:25:42,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-12-06 20:25:42,372 INFO L87 Difference]: Start difference. First operand 662 states and 870 transitions. Second operand has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:25:47,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:25:48,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:26:04,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:26:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:09,819 INFO L93 Difference]: Finished difference Result 4687 states and 6489 transitions. [2021-12-06 20:26:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 20:26:09,820 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 20:26:09,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:09,836 INFO L225 Difference]: With dead ends: 4687 [2021-12-06 20:26:09,836 INFO L226 Difference]: Without dead ends: 4687 [2021-12-06 20:26:09,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=975, Invalid=2331, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 20:26:09,837 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1224 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:09,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 932 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 889 Invalid, 2 Unknown, 122 Unchecked, 8.9s Time] [2021-12-06 20:26:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2021-12-06 20:26:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 758. [2021-12-06 20:26:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 753 states have (on average 1.3147410358565736) internal successors, (990), 757 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 990 transitions. [2021-12-06 20:26:09,864 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 990 transitions. Word has length 41 [2021-12-06 20:26:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:09,865 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 990 transitions. [2021-12-06 20:26:09,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.925925925925926) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 990 transitions. [2021-12-06 20:26:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 20:26:09,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:09,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:09,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-12-06 20:26:10,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:26:10,066 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:26:10,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:10,068 INFO L85 PathProgramCache]: Analyzing trace with hash 829184327, now seen corresponding path program 1 times [2021-12-06 20:26:10,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:26:10,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085037349] [2021-12-06 20:26:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:10,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:26:10,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:26:10,072 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:26:10,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-06 20:26:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:26:10,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:10,270 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-12-06 20:26:10,270 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 2 case distinctions, treesize of input 14 treesize of output 29 [2021-12-06 20:26:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:26:10,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:26:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:26:11,668 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:26:11,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085037349] [2021-12-06 20:26:11,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085037349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:26:11,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:26:11,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-06 20:26:11,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147683488] [2021-12-06 20:26:11,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:26:11,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:26:11,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:26:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:26:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:26:11,669 INFO L87 Difference]: Start difference. First operand 758 states and 990 transitions. Second operand has 14 states, 13 states have (on average 6.153846153846154) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:12,049 INFO L93 Difference]: Finished difference Result 855 states and 1111 transitions. [2021-12-06 20:26:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:26:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.153846153846154) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 20:26:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:12,053 INFO L225 Difference]: With dead ends: 855 [2021-12-06 20:26:12,053 INFO L226 Difference]: Without dead ends: 826 [2021-12-06 20:26:12,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:26:12,054 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 66 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:12,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 247 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2021-12-06 20:26:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-12-06 20:26:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 771. [2021-12-06 20:26:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 766 states have (on average 1.3133159268929504) internal successors, (1006), 770 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1006 transitions. [2021-12-06 20:26:12,063 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1006 transitions. Word has length 41 [2021-12-06 20:26:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:12,063 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1006 transitions. [2021-12-06 20:26:12,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.153846153846154) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1006 transitions. [2021-12-06 20:26:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 20:26:12,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:12,064 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:12,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-12-06 20:26:12,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:26:12,265 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:26:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash 735316555, now seen corresponding path program 4 times [2021-12-06 20:26:12,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:26:12,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910628713] [2021-12-06 20:26:12,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:26:12,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:26:12,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:26:12,270 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:26:12,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-06 20:26:12,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:26:12,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:26:12,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 20:26:12,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:26:12,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:26:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:26:13,073 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:26:13,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910628713] [2021-12-06 20:26:13,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910628713] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:26:13,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:26:13,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-12-06 20:26:13,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200951202] [2021-12-06 20:26:13,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:26:13,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 20:26:13,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:26:13,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 20:26:13,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:26:13,074 INFO L87 Difference]: Start difference. First operand 771 states and 1006 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:14,365 INFO L93 Difference]: Finished difference Result 1837 states and 2316 transitions. [2021-12-06 20:26:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 20:26:14,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-06 20:26:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:14,371 INFO L225 Difference]: With dead ends: 1837 [2021-12-06 20:26:14,371 INFO L226 Difference]: Without dead ends: 1743 [2021-12-06 20:26:14,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 20:26:14,372 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 472 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:14,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 801 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 20:26:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-12-06 20:26:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1266. [2021-12-06 20:26:14,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1261 states have (on average 1.3402061855670102) internal successors, (1690), 1265 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1690 transitions. [2021-12-06 20:26:14,388 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1690 transitions. Word has length 45 [2021-12-06 20:26:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:14,388 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1690 transitions. [2021-12-06 20:26:14,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:14,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1690 transitions. [2021-12-06 20:26:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 20:26:14,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:14,389 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:14,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-12-06 20:26:14,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:26:14,590 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:26:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1022969014, now seen corresponding path program 4 times [2021-12-06 20:26:14,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:26:14,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768742672] [2021-12-06 20:26:14,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:26:14,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:26:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:26:14,595 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:26:14,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-06 20:26:14,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:26:14,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:26:14,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 20:26:14,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:26:15,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:26:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:26:15,800 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:26:15,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768742672] [2021-12-06 20:26:15,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768742672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:26:15,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:26:15,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-12-06 20:26:15,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724895565] [2021-12-06 20:26:15,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:26:15,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 20:26:15,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:26:15,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 20:26:15,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:26:15,802 INFO L87 Difference]: Start difference. First operand 1266 states and 1690 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:16,900 INFO L93 Difference]: Finished difference Result 2148 states and 2867 transitions. [2021-12-06 20:26:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 20:26:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 20:26:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:16,908 INFO L225 Difference]: With dead ends: 2148 [2021-12-06 20:26:16,908 INFO L226 Difference]: Without dead ends: 1928 [2021-12-06 20:26:16,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=299, Invalid=1107, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 20:26:16,908 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 444 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:16,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 931 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:26:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-12-06 20:26:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1666. [2021-12-06 20:26:16,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1661 states have (on average 1.3425647200481639) internal successors, (2230), 1665 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2230 transitions. [2021-12-06 20:26:16,928 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2230 transitions. Word has length 52 [2021-12-06 20:26:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:16,929 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 2230 transitions. [2021-12-06 20:26:16,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2230 transitions. [2021-12-06 20:26:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 20:26:16,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:16,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:16,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-12-06 20:26:17,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:26:17,131 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:26:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash -878193103, now seen corresponding path program 2 times [2021-12-06 20:26:17,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:26:17,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298205483] [2021-12-06 20:26:17,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:26:17,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:26:17,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:26:17,136 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:26:17,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-06 20:26:17,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:26:17,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:26:17,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 20:26:17,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:17,514 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-12-06 20:26:17,514 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 2 case distinctions, treesize of input 14 treesize of output 29 [2021-12-06 20:26:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:26:18,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:26:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:26:20,263 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:26:20,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298205483] [2021-12-06 20:26:20,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298205483] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:26:20,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:26:20,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-12-06 20:26:20,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507854733] [2021-12-06 20:26:20,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:26:20,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 20:26:20,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:26:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 20:26:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-06 20:26:20,264 INFO L87 Difference]: Start difference. First operand 1666 states and 2230 transitions. Second operand has 19 states, 18 states have (on average 6.111111111111111) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:22,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:22,011 INFO L93 Difference]: Finished difference Result 2041 states and 2718 transitions. [2021-12-06 20:26:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:26:22,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 6.111111111111111) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 20:26:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:22,019 INFO L225 Difference]: With dead ends: 2041 [2021-12-06 20:26:22,019 INFO L226 Difference]: Without dead ends: 1946 [2021-12-06 20:26:22,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-12-06 20:26:22,020 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 324 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:22,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 506 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 201 Invalid, 0 Unknown, 66 Unchecked, 1.0s Time] [2021-12-06 20:26:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-12-06 20:26:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1564. [2021-12-06 20:26:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1559 states have (on average 1.3470173187940988) internal successors, (2100), 1563 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2100 transitions. [2021-12-06 20:26:22,042 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2100 transitions. Word has length 56 [2021-12-06 20:26:22,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:22,042 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2100 transitions. [2021-12-06 20:26:22,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 6.111111111111111) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2100 transitions. [2021-12-06 20:26:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 20:26:22,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:22,044 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:22,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-12-06 20:26:22,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:26:22,244 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:26:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:22,246 INFO L85 PathProgramCache]: Analyzing trace with hash -564407577, now seen corresponding path program 5 times [2021-12-06 20:26:22,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:26:22,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393703603] [2021-12-06 20:26:22,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:26:22,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:26:22,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:26:22,250 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:26:22,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-06 20:26:22,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 20:26:22,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:26:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 20:26:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:26:22,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:26:24,238 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 27 treesize of output 23 [2021-12-06 20:26:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:26:25,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:26:25,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393703603] [2021-12-06 20:26:25,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393703603] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:26:25,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:26:25,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-06 20:26:25,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023084081] [2021-12-06 20:26:25,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:26:25,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:26:25,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:26:25,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:26:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:26:25,157 INFO L87 Difference]: Start difference. First operand 1564 states and 2100 transitions. Second operand has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:31,428 INFO L93 Difference]: Finished difference Result 10301 states and 14215 transitions. [2021-12-06 20:26:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 20:26:31,429 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 20:26:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:31,463 INFO L225 Difference]: With dead ends: 10301 [2021-12-06 20:26:31,463 INFO L226 Difference]: Without dead ends: 10301 [2021-12-06 20:26:31,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=509, Invalid=2247, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 20:26:31,464 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1693 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:31,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1693 Valid, 996 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 20:26:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10301 states. [2021-12-06 20:26:31,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10301 to 1969. [2021-12-06 20:26:31,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1964 states have (on average 1.3533604887983706) internal successors, (2658), 1968 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2658 transitions. [2021-12-06 20:26:31,516 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2658 transitions. Word has length 56 [2021-12-06 20:26:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:31,516 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 2658 transitions. [2021-12-06 20:26:31,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2658 transitions. [2021-12-06 20:26:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 20:26:31,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:31,518 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:31,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-12-06 20:26:31,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:26:31,719 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:26:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1544267116, now seen corresponding path program 5 times [2021-12-06 20:26:31,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:26:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592327946] [2021-12-06 20:26:31,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:26:31,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:26:31,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:26:31,721 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:26:31,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-06 20:26:32,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 20:26:32,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:26:32,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 20:26:32,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:26:32,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:26:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 11 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:26:33,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:26:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592327946] [2021-12-06 20:26:33,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592327946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:26:33,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:26:33,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-12-06 20:26:33,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015449101] [2021-12-06 20:26:33,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:26:33,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 20:26:33,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:26:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 20:26:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 20:26:33,400 INFO L87 Difference]: Start difference. First operand 1969 states and 2658 transitions. Second operand has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 34 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:38,069 INFO L93 Difference]: Finished difference Result 5507 states and 6976 transitions. [2021-12-06 20:26:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 20:26:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 34 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-06 20:26:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:38,078 INFO L225 Difference]: With dead ends: 5507 [2021-12-06 20:26:38,078 INFO L226 Difference]: Without dead ends: 5465 [2021-12-06 20:26:38,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1033, Invalid=4667, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 20:26:38,080 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 1452 mSDsluCounter, 3573 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 3827 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:38,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 3827 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 20:26:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2021-12-06 20:26:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 2752. [2021-12-06 20:26:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2747 states have (on average 1.3796869311976703) internal successors, (3790), 2751 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 3790 transitions. [2021-12-06 20:26:38,115 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 3790 transitions. Word has length 57 [2021-12-06 20:26:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:38,115 INFO L470 AbstractCegarLoop]: Abstraction has 2752 states and 3790 transitions. [2021-12-06 20:26:38,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 34 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 3790 transitions. [2021-12-06 20:26:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 20:26:38,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:38,117 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:38,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-06 20:26:38,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:26:38,317 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:26:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:38,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1716480926, now seen corresponding path program 1 times [2021-12-06 20:26:38,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:26:38,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346777356] [2021-12-06 20:26:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:38,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:26:38,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:26:38,319 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:26:38,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-06 20:26:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:38,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 20:26:38,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 20:26:38,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:26:39,582 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 38 treesize of output 32 [2021-12-06 20:26:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 20:26:40,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:26:40,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346777356] [2021-12-06 20:26:40,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346777356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:26:40,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:26:40,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-06 20:26:40,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897873366] [2021-12-06 20:26:40,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:26:40,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 20:26:40,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:26:40,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 20:26:40,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-12-06 20:26:40,910 INFO L87 Difference]: Start difference. First operand 2752 states and 3790 transitions. Second operand has 22 states, 21 states have (on average 4.095238095238095) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:42,625 INFO L93 Difference]: Finished difference Result 6315 states and 7882 transitions. [2021-12-06 20:26:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 20:26:42,626 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.095238095238095) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-06 20:26:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:42,633 INFO L225 Difference]: With dead ends: 6315 [2021-12-06 20:26:42,633 INFO L226 Difference]: Without dead ends: 6315 [2021-12-06 20:26:42,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 20:26:42,634 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 561 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:42,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 436 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:26:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2021-12-06 20:26:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 2713. [2021-12-06 20:26:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2708 states have (on average 1.3777695716395864) internal successors, (3731), 2712 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3731 transitions. [2021-12-06 20:26:42,675 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3731 transitions. Word has length 57 [2021-12-06 20:26:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:42,675 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 3731 transitions. [2021-12-06 20:26:42,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.095238095238095) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3731 transitions. [2021-12-06 20:26:42,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:26:42,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:42,676 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:42,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-12-06 20:26:42,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:26:42,877 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:26:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:42,878 INFO L85 PathProgramCache]: Analyzing trace with hash -987577769, now seen corresponding path program 6 times [2021-12-06 20:26:42,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:26:42,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511339329] [2021-12-06 20:26:42,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:26:42,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:26:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:26:42,883 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:26:42,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-12-06 20:26:43,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 20:26:43,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:26:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 20:26:43,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:43,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:26:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:26:43,185 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-06 20:26:43,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-12-06 20:26:43,191 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 48 treesize of output 46 [2021-12-06 20:26:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-06 20:26:43,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:26:46,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:26:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-06 20:26:46,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:26:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511339329] [2021-12-06 20:26:46,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511339329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:26:46,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:26:46,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-06 20:26:46,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310082195] [2021-12-06 20:26:46,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:26:46,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 20:26:46,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:26:46,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 20:26:46,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-12-06 20:26:46,765 INFO L87 Difference]: Start difference. First operand 2713 states and 3731 transitions. Second operand has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:58,528 INFO L93 Difference]: Finished difference Result 8635 states and 10908 transitions. [2021-12-06 20:26:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 20:26:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 20:26:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:58,538 INFO L225 Difference]: With dead ends: 8635 [2021-12-06 20:26:58,538 INFO L226 Difference]: Without dead ends: 8412 [2021-12-06 20:26:58,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=828, Invalid=2142, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 20:26:58,539 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 415 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:58,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 476 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 676 Invalid, 0 Unknown, 68 Unchecked, 4.1s Time] [2021-12-06 20:26:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8412 states. [2021-12-06 20:26:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8412 to 4304. [2021-12-06 20:26:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 4299 states have (on average 1.3968364735985113) internal successors, (6005), 4303 states have internal predecessors, (6005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 6005 transitions. [2021-12-06 20:26:58,591 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 6005 transitions. Word has length 61 [2021-12-06 20:26:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:58,591 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 6005 transitions. [2021-12-06 20:26:58,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 6005 transitions. [2021-12-06 20:26:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 20:26:58,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:58,593 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:58,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-12-06 20:26:58,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:26:58,794 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:26:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1288171396, now seen corresponding path program 6 times [2021-12-06 20:26:58,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:26:58,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232275675] [2021-12-06 20:26:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:26:58,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:26:58,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:26:58,798 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:26:58,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-06 20:26:58,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 20:26:58,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:26:59,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 20:26:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:59,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:26:59,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:26:59,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:26:59,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-12-06 20:26:59,055 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 20:26:59,055 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 83 treesize of output 79 [2021-12-06 20:26:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 20:26:59,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:27:02,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:27:02,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:27:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 20:27:02,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:27:02,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232275675] [2021-12-06 20:27:02,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232275675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:27:02,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:27:02,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-06 20:27:02,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923316707] [2021-12-06 20:27:02,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:27:02,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 20:27:02,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:27:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 20:27:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-12-06 20:27:02,798 INFO L87 Difference]: Start difference. First operand 4304 states and 6005 transitions. Second operand has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:06,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:27:09,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:27:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:27:11,317 INFO L93 Difference]: Finished difference Result 12309 states and 17384 transitions. [2021-12-06 20:27:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 20:27:11,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 20:27:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:27:11,330 INFO L225 Difference]: With dead ends: 12309 [2021-12-06 20:27:11,330 INFO L226 Difference]: Without dead ends: 12309 [2021-12-06 20:27:11,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 20:27:11,331 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 395 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:27:11,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 413 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 352 Invalid, 0 Unknown, 60 Unchecked, 5.1s Time] [2021-12-06 20:27:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12309 states. [2021-12-06 20:27:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12309 to 11334. [2021-12-06 20:27:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11334 states, 11329 states have (on average 1.4268690970076794) internal successors, (16165), 11333 states have internal predecessors, (16165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11334 states to 11334 states and 16165 transitions. [2021-12-06 20:27:11,453 INFO L78 Accepts]: Start accepts. Automaton has 11334 states and 16165 transitions. Word has length 64 [2021-12-06 20:27:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:27:11,453 INFO L470 AbstractCegarLoop]: Abstraction has 11334 states and 16165 transitions. [2021-12-06 20:27:11,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 11334 states and 16165 transitions. [2021-12-06 20:27:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 20:27:11,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:27:11,456 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-12-06 20:27:11,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-12-06 20:27:11,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:27:11,656 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:27:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:27:11,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1770568872, now seen corresponding path program 4 times [2021-12-06 20:27:11,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:27:11,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553897783] [2021-12-06 20:27:11,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:27:11,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:27:11,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:27:11,660 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:27:11,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-06 20:27:11,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:27:11,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:27:11,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 20:27:11,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:27:11,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:27:11,950 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-12-06 20:27:11,950 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 2 case distinctions, treesize of input 16 treesize of output 24 [2021-12-06 20:27:11,957 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 20 treesize of output 18 [2021-12-06 20:27:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:27:13,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:27:23,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:27:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:27:23,761 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:27:23,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553897783] [2021-12-06 20:27:23,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553897783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:27:23,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:27:23,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-12-06 20:27:23,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478836288] [2021-12-06 20:27:23,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:27:23,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 20:27:23,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:27:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 20:27:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1524, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 20:27:23,763 INFO L87 Difference]: Start difference. First operand 11334 states and 16165 transitions. Second operand has 46 states, 45 states have (on average 2.933333333333333) internal successors, (132), 46 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:39,176 WARN L227 SmtUtils]: Spent 11.00s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:27:41,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:27:43,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:27:45,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:27:55,853 WARN L227 SmtUtils]: Spent 9.43s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:28:15,316 WARN L227 SmtUtils]: Spent 18.66s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:28:17,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:28:19,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:28:21,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:28:23,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:28:30,982 WARN L227 SmtUtils]: Spent 7.24s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:28:46,879 WARN L227 SmtUtils]: Spent 15.04s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:28:49,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:28:51,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:28:53,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:28:59,742 WARN L227 SmtUtils]: Spent 5.97s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:29:11,756 WARN L227 SmtUtils]: Spent 11.18s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:29:14,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:29:16,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:29:18,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:29:33,196 WARN L227 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:29:35,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:29:37,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:29:39,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:29:51,634 WARN L227 SmtUtils]: Spent 6.92s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:29:54,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:29:56,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:29:58,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:08,088 WARN L227 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 109 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:30:10,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:12,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:14,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:25,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:27,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:35,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:37,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:44,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:46,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:52,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:30:54,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:31:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:31:07,152 INFO L93 Difference]: Finished difference Result 287320 states and 412332 transitions. [2021-12-06 20:31:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 20:31:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.933333333333333) internal successors, (132), 46 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 20:31:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:31:07,521 INFO L225 Difference]: With dead ends: 287320 [2021-12-06 20:31:07,521 INFO L226 Difference]: Without dead ends: 287320 [2021-12-06 20:31:07,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 153.4s TimeCoverageRelationStatistics Valid=2183, Invalid=5127, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 20:31:07,524 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 7639 mSDsluCounter, 4131 mSDsCounter, 0 mSdLazyCounter, 3845 mSolverCounterSat, 177 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7639 SdHoareTripleChecker+Valid, 4358 SdHoareTripleChecker+Invalid, 4289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 3845 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 76.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:31:07,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7639 Valid, 4358 Invalid, 4289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3845 Invalid, 29 Unknown, 238 Unchecked, 76.4s Time] [2021-12-06 20:31:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287320 states. [2021-12-06 20:31:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287320 to 11462. [2021-12-06 20:31:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11462 states, 11457 states have (on average 1.4248930784673126) internal successors, (16325), 11461 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:31:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11462 states to 11462 states and 16325 transitions. [2021-12-06 20:31:09,005 INFO L78 Accepts]: Start accepts. Automaton has 11462 states and 16325 transitions. Word has length 67 [2021-12-06 20:31:09,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:31:09,006 INFO L470 AbstractCegarLoop]: Abstraction has 11462 states and 16325 transitions. [2021-12-06 20:31:09,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.933333333333333) internal successors, (132), 46 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:31:09,006 INFO L276 IsEmpty]: Start isEmpty. Operand 11462 states and 16325 transitions. [2021-12-06 20:31:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 20:31:09,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:31:09,009 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:31:09,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-12-06 20:31:09,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:31:09,210 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:31:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:31:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1457387987, now seen corresponding path program 3 times [2021-12-06 20:31:09,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:31:09,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215644888] [2021-12-06 20:31:09,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:31:09,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:31:09,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:31:09,217 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:31:09,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-12-06 20:31:09,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 20:31:09,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:31:09,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 20:31:09,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:31:09,852 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-12-06 20:31:09,852 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 2 case distinctions, treesize of input 14 treesize of output 29 [2021-12-06 20:31:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 20:31:10,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:31:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 20:31:17,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:31:17,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215644888] [2021-12-06 20:31:17,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215644888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:31:17,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:31:17,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-12-06 20:31:17,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740159436] [2021-12-06 20:31:17,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:31:17,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 20:31:17,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:31:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 20:31:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-12-06 20:31:17,220 INFO L87 Difference]: Start difference. First operand 11462 states and 16325 transitions. Second operand has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:31:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:31:29,795 INFO L93 Difference]: Finished difference Result 29750 states and 42366 transitions. [2021-12-06 20:31:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 20:31:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-06 20:31:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:31:29,820 INFO L225 Difference]: With dead ends: 29750 [2021-12-06 20:31:29,820 INFO L226 Difference]: Without dead ends: 29750 [2021-12-06 20:31:29,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=393, Invalid=1863, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 20:31:29,821 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 1165 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:31:29,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 1557 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 872 Invalid, 0 Unknown, 176 Unchecked, 5.2s Time] [2021-12-06 20:31:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29750 states. [2021-12-06 20:31:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29750 to 25751. [2021-12-06 20:31:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25751 states, 25746 states have (on average 1.4280664957663327) internal successors, (36767), 25750 states have internal predecessors, (36767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:31:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25751 states to 25751 states and 36767 transitions. [2021-12-06 20:31:30,072 INFO L78 Accepts]: Start accepts. Automaton has 25751 states and 36767 transitions. Word has length 71 [2021-12-06 20:31:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:31:30,072 INFO L470 AbstractCegarLoop]: Abstraction has 25751 states and 36767 transitions. [2021-12-06 20:31:30,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.185185185185185) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:31:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 25751 states and 36767 transitions. [2021-12-06 20:31:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 20:31:30,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:31:30,076 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:31:30,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-12-06 20:31:30,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:31:30,277 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:31:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:31:30,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1274706557, now seen corresponding path program 4 times [2021-12-06 20:31:30,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:31:30,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557879407] [2021-12-06 20:31:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:31:30,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:31:30,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:31:30,281 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:31:30,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-12-06 20:31:30,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:31:30,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:31:30,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 20:31:30,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:31:30,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:31:30,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:31:30,538 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-06 20:31:30,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-12-06 20:31:30,544 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 48 treesize of output 46 [2021-12-06 20:31:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:31:31,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:31:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:31:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:31:46,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:31:46,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557879407] [2021-12-06 20:31:46,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557879407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:31:46,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:31:46,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-12-06 20:31:46,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520942612] [2021-12-06 20:31:46,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:31:46,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 20:31:46,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:31:46,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 20:31:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 20:31:46,467 INFO L87 Difference]: Start difference. First operand 25751 states and 36767 transitions. Second operand has 48 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 48 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:32:05,756 WARN L227 SmtUtils]: Spent 14.54s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:32:07,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:32:09,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:32:11,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:32:13,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:32:28,584 WARN L227 SmtUtils]: Spent 14.16s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:32:41,000 WARN L227 SmtUtils]: Spent 11.64s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:32:43,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:32:45,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:32:46,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:32:48,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:33:01,744 WARN L227 SmtUtils]: Spent 12.18s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:33:12,265 WARN L227 SmtUtils]: Spent 9.64s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:33:14,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:33:16,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:33:28,097 WARN L227 SmtUtils]: Spent 10.57s on a formula simplification that was a NOOP. DAG size: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:33:38,340 WARN L227 SmtUtils]: Spent 9.69s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:33:40,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:33:42,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:33:50,229 WARN L227 SmtUtils]: Spent 6.93s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:33:57,163 WARN L227 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:34:00,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:34:02,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:34:09,245 WARN L227 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 20:34:16,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:34:28,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:35:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:35:06,483 INFO L93 Difference]: Finished difference Result 191518 states and 278508 transitions. [2021-12-06 20:35:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-06 20:35:06,486 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 48 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 20:35:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:35:06,681 INFO L225 Difference]: With dead ends: 191518 [2021-12-06 20:35:06,681 INFO L226 Difference]: Without dead ends: 191518 [2021-12-06 20:35:06,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2880 ImplicationChecksByTransitivity, 162.3s TimeCoverageRelationStatistics Valid=2518, Invalid=6038, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 20:35:06,683 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 5581 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 3488 mSolverCounterSat, 129 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5581 SdHoareTripleChecker+Valid, 2929 SdHoareTripleChecker+Invalid, 3663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3488 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 46.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:35:06,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5581 Valid, 2929 Invalid, 3663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3488 Invalid, 13 Unknown, 33 Unchecked, 46.0s Time] [2021-12-06 20:35:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191518 states. [2021-12-06 20:35:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191518 to 26071. [2021-12-06 20:35:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26071 states, 26066 states have (on average 1.4258804573006982) internal successors, (37167), 26070 states have internal predecessors, (37167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26071 states to 26071 states and 37167 transitions. [2021-12-06 20:35:07,607 INFO L78 Accepts]: Start accepts. Automaton has 26071 states and 37167 transitions. Word has length 73 [2021-12-06 20:35:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:35:07,608 INFO L470 AbstractCegarLoop]: Abstraction has 26071 states and 37167 transitions. [2021-12-06 20:35:07,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 48 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 26071 states and 37167 transitions. [2021-12-06 20:35:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 20:35:07,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:35:07,612 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:35:07,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-12-06 20:35:07,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:35:07,813 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:35:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:35:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash 962703199, now seen corresponding path program 2 times [2021-12-06 20:35:07,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:35:07,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296344532] [2021-12-06 20:35:07,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:35:07,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:35:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:35:07,818 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:35:07,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-12-06 20:35:08,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:35:08,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:35:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 20:35:08,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:35:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 29 proven. 121 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:35:08,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:35:10,789 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 35 treesize of output 29 [2021-12-06 20:35:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:35:13,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:35:13,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296344532] [2021-12-06 20:35:13,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296344532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:35:13,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:35:13,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-12-06 20:35:13,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430768502] [2021-12-06 20:35:13,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:35:13,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 20:35:13,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:35:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 20:35:13,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 20:35:13,395 INFO L87 Difference]: Start difference. First operand 26071 states and 37167 transitions. Second operand has 33 states, 32 states have (on average 4.1875) internal successors, (134), 33 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:41,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:35:41,001 INFO L93 Difference]: Finished difference Result 162430 states and 215486 transitions. [2021-12-06 20:35:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 20:35:41,002 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.1875) internal successors, (134), 33 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 20:35:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:35:41,165 INFO L225 Difference]: With dead ends: 162430 [2021-12-06 20:35:41,165 INFO L226 Difference]: Without dead ends: 162430 [2021-12-06 20:35:41,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=2029, Invalid=9527, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 20:35:41,166 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 4325 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4325 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:35:41,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4325 Valid, 1801 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2718 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-12-06 20:35:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162430 states. [2021-12-06 20:35:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162430 to 23509. [2021-12-06 20:35:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23509 states, 23504 states have (on average 1.4294588155207624) internal successors, (33598), 23508 states have internal predecessors, (33598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23509 states to 23509 states and 33598 transitions. [2021-12-06 20:35:41,925 INFO L78 Accepts]: Start accepts. Automaton has 23509 states and 33598 transitions. Word has length 73 [2021-12-06 20:35:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:35:41,925 INFO L470 AbstractCegarLoop]: Abstraction has 23509 states and 33598 transitions. [2021-12-06 20:35:41,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.1875) internal successors, (134), 33 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 23509 states and 33598 transitions. [2021-12-06 20:35:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 20:35:41,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:35:41,929 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:35:41,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-12-06 20:35:42,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:35:42,130 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:35:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:35:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1056460644, now seen corresponding path program 3 times [2021-12-06 20:35:42,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:35:42,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405971350] [2021-12-06 20:35:42,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:35:42,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:35:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:35:42,136 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:35:42,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-12-06 20:35:42,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 20:35:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:35:42,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 20:35:42,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:35:42,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:35:42,592 INFO L354 Elim1Store]: treesize reduction 26, result has 31.6 percent of original size [2021-12-06 20:35:42,592 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 1 case distinctions, treesize of input 14 treesize of output 25 [2021-12-06 20:35:42,602 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 106 treesize of output 102 [2021-12-06 20:35:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 74 proven. 30 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-06 20:35:43,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:35:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-06 20:35:47,109 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:35:47,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405971350] [2021-12-06 20:35:47,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405971350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:35:47,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:35:47,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-12-06 20:35:47,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135277277] [2021-12-06 20:35:47,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:35:47,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:35:47,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:35:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:35:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-12-06 20:35:47,110 INFO L87 Difference]: Start difference. First operand 23509 states and 33598 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:35:55,171 INFO L93 Difference]: Finished difference Result 61467 states and 76607 transitions. [2021-12-06 20:35:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 20:35:55,173 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-06 20:35:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:35:55,227 INFO L225 Difference]: With dead ends: 61467 [2021-12-06 20:35:55,227 INFO L226 Difference]: Without dead ends: 61231 [2021-12-06 20:35:55,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=809, Invalid=2497, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 20:35:55,228 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 928 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:35:55,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 680 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-06 20:35:55,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61231 states. [2021-12-06 20:35:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61231 to 20088. [2021-12-06 20:35:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20088 states, 20083 states have (on average 1.4278245282079371) internal successors, (28675), 20087 states have internal predecessors, (28675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20088 states to 20088 states and 28675 transitions. [2021-12-06 20:35:55,547 INFO L78 Accepts]: Start accepts. Automaton has 20088 states and 28675 transitions. Word has length 73 [2021-12-06 20:35:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:35:55,547 INFO L470 AbstractCegarLoop]: Abstraction has 20088 states and 28675 transitions. [2021-12-06 20:35:55,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:35:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 20088 states and 28675 transitions. [2021-12-06 20:35:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 20:35:55,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:35:55,552 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:35:55,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2021-12-06 20:35:55,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:35:55,753 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:35:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:35:55,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1211507287, now seen corresponding path program 4 times [2021-12-06 20:35:55,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:35:55,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243211597] [2021-12-06 20:35:55,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:35:55,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:35:55,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:35:55,758 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:35:55,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-12-06 20:35:56,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:35:56,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:35:56,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:35:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:35:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 46 proven. 132 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:35:56,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:35:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 14 proven. 164 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:35:57,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:35:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243211597] [2021-12-06 20:35:57,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243211597] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:35:57,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:35:57,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-12-06 20:35:57,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165783483] [2021-12-06 20:35:57,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:35:57,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 20:35:57,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:35:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 20:35:57,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 20:35:57,704 INFO L87 Difference]: Start difference. First operand 20088 states and 28675 transitions. Second operand has 38 states, 38 states have (on average 3.710526315789474) internal successors, (141), 38 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:05,090 INFO L93 Difference]: Finished difference Result 44890 states and 58036 transitions. [2021-12-06 20:36:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-06 20:36:05,092 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.710526315789474) internal successors, (141), 38 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 20:36:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:05,125 INFO L225 Difference]: With dead ends: 44890 [2021-12-06 20:36:05,125 INFO L226 Difference]: Without dead ends: 44608 [2021-12-06 20:36:05,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2069 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1332, Invalid=6858, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 20:36:05,126 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 1818 mSDsluCounter, 5259 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 5608 SdHoareTripleChecker+Invalid, 3077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:05,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1818 Valid, 5608 Invalid, 3077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-06 20:36:05,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44608 states. [2021-12-06 20:36:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44608 to 22778. [2021-12-06 20:36:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22778 states, 22773 states have (on average 1.433364071488166) internal successors, (32642), 22777 states have internal predecessors, (32642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22778 states to 22778 states and 32642 transitions. [2021-12-06 20:36:05,424 INFO L78 Accepts]: Start accepts. Automaton has 22778 states and 32642 transitions. Word has length 77 [2021-12-06 20:36:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:05,424 INFO L470 AbstractCegarLoop]: Abstraction has 22778 states and 32642 transitions. [2021-12-06 20:36:05,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.710526315789474) internal successors, (141), 38 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 22778 states and 32642 transitions. [2021-12-06 20:36:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 20:36:05,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:05,429 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:36:05,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-12-06 20:36:05,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:36:05,630 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:36:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash 966203802, now seen corresponding path program 5 times [2021-12-06 20:36:05,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:36:05,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110350602] [2021-12-06 20:36:05,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:36:05,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:36:05,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:36:05,637 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:36:05,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-12-06 20:36:06,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 20:36:06,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:36:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 20:36:06,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:36:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 34 proven. 169 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:36:06,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:36:10,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-12-06 20:36:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 20:36:13,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:36:13,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110350602] [2021-12-06 20:36:13,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110350602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:36:13,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:36:13,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-12-06 20:36:13,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982641920] [2021-12-06 20:36:13,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:36:13,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 20:36:13,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:36:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 20:36:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 20:36:13,631 INFO L87 Difference]: Start difference. First operand 22778 states and 32642 transitions. Second operand has 38 states, 37 states have (on average 4.054054054054054) internal successors, (150), 38 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:37:00,171 INFO L93 Difference]: Finished difference Result 137809 states and 183887 transitions. [2021-12-06 20:37:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-06 20:37:00,173 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.054054054054054) internal successors, (150), 38 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 20:37:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:37:00,292 INFO L225 Difference]: With dead ends: 137809 [2021-12-06 20:37:00,292 INFO L226 Difference]: Without dead ends: 137809 [2021-12-06 20:37:00,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4985 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=2872, Invalid=14420, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 20:37:00,294 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 6925 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 3618 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6925 SdHoareTripleChecker+Valid, 2566 SdHoareTripleChecker+Invalid, 4258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 3618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:37:00,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6925 Valid, 2566 Invalid, 4258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 3618 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2021-12-06 20:37:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137809 states. [2021-12-06 20:37:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137809 to 23123. [2021-12-06 20:37:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23123 states, 23118 states have (on average 1.4358508521498399) internal successors, (33194), 23122 states have internal predecessors, (33194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23123 states to 23123 states and 33194 transitions. [2021-12-06 20:37:00,874 INFO L78 Accepts]: Start accepts. Automaton has 23123 states and 33194 transitions. Word has length 81 [2021-12-06 20:37:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:37:00,875 INFO L470 AbstractCegarLoop]: Abstraction has 23123 states and 33194 transitions. [2021-12-06 20:37:00,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.054054054054054) internal successors, (150), 38 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 23123 states and 33194 transitions. [2021-12-06 20:37:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 20:37:00,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:37:00,881 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:37:00,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2021-12-06 20:37:01,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:37:01,082 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:37:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:37:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 171189742, now seen corresponding path program 4 times [2021-12-06 20:37:01,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:37:01,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453055522] [2021-12-06 20:37:01,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:37:01,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:37:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:37:01,088 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:37:01,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-12-06 20:37:01,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:37:01,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:37:01,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 20:37:01,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:37:01,373 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-12-06 20:37:01,374 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 2 case distinctions, treesize of input 14 treesize of output 29 [2021-12-06 20:37:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 20:37:02,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:37:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 20:37:08,438 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:37:08,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453055522] [2021-12-06 20:37:08,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453055522] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:37:08,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:37:08,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-12-06 20:37:08,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547295648] [2021-12-06 20:37:08,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:37:08,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 20:37:08,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:37:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 20:37:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-12-06 20:37:08,439 INFO L87 Difference]: Start difference. First operand 23123 states and 33194 transitions. Second operand has 28 states, 27 states have (on average 5.111111111111111) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:37:24,032 INFO L93 Difference]: Finished difference Result 48866 states and 70016 transitions. [2021-12-06 20:37:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 20:37:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.111111111111111) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 20:37:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:37:24,068 INFO L225 Difference]: With dead ends: 48866 [2021-12-06 20:37:24,069 INFO L226 Difference]: Without dead ends: 48866 [2021-12-06 20:37:24,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=702, Invalid=2378, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 20:37:24,069 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 401 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:37:24,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 524 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 549 Invalid, 0 Unknown, 73 Unchecked, 3.8s Time] [2021-12-06 20:37:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48866 states. [2021-12-06 20:37:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48866 to 29107. [2021-12-06 20:37:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29107 states, 29102 states have (on average 1.4442993608686687) internal successors, (42032), 29106 states have internal predecessors, (42032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29107 states to 29107 states and 42032 transitions. [2021-12-06 20:37:24,391 INFO L78 Accepts]: Start accepts. Automaton has 29107 states and 42032 transitions. Word has length 82 [2021-12-06 20:37:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:37:24,392 INFO L470 AbstractCegarLoop]: Abstraction has 29107 states and 42032 transitions. [2021-12-06 20:37:24,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.111111111111111) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 29107 states and 42032 transitions. [2021-12-06 20:37:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 20:37:24,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:37:24,400 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:37:24,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-12-06 20:37:24,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:37:24,601 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:37:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:37:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash -18483438, now seen corresponding path program 6 times [2021-12-06 20:37:24,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:37:24,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184816142] [2021-12-06 20:37:24,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 20:37:24,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:37:24,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:37:24,607 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:37:24,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-12-06 20:37:25,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 20:37:25,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:37:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 20:37:25,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:37:25,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:25,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:37:25,162 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-12-06 20:37:25,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2021-12-06 20:37:25,168 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 114 treesize of output 110 [2021-12-06 20:37:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 37 proven. 107 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-06 20:37:26,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:37:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:37:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-06 20:37:32,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:37:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184816142] [2021-12-06 20:37:32,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184816142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:37:32,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:37:32,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-12-06 20:37:32,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932601327] [2021-12-06 20:37:32,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:37:32,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 20:37:32,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:37:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 20:37:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-12-06 20:37:32,256 INFO L87 Difference]: Start difference. First operand 29107 states and 42032 transitions. Second operand has 30 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:38:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:38:08,011 INFO L93 Difference]: Finished difference Result 90449 states and 113882 transitions. [2021-12-06 20:38:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 20:38:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 20:38:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:38:08,084 INFO L225 Difference]: With dead ends: 90449 [2021-12-06 20:38:08,085 INFO L226 Difference]: Without dead ends: 90283 [2021-12-06 20:38:08,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=1350, Invalid=3620, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 20:38:08,085 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1323 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:38:08,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1323 Valid, 1091 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1602 Invalid, 0 Unknown, 179 Unchecked, 7.4s Time] [2021-12-06 20:38:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90283 states. [2021-12-06 20:38:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90283 to 22642. [2021-12-06 20:38:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22642 states, 22637 states have (on average 1.4610593276494235) internal successors, (33074), 22641 states have internal predecessors, (33074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:38:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22642 states to 22642 states and 33074 transitions. [2021-12-06 20:38:08,594 INFO L78 Accepts]: Start accepts. Automaton has 22642 states and 33074 transitions. Word has length 85 [2021-12-06 20:38:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:38:08,594 INFO L470 AbstractCegarLoop]: Abstraction has 22642 states and 33074 transitions. [2021-12-06 20:38:08,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:38:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 22642 states and 33074 transitions. [2021-12-06 20:38:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 20:38:08,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:38:08,605 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:38:08,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2021-12-06 20:38:08,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:38:08,806 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:38:08,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:38:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1001777138, now seen corresponding path program 1 times [2021-12-06 20:38:08,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:38:08,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462351565] [2021-12-06 20:38:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:38:08,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:38:08,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:38:08,814 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:38:08,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-12-06 20:38:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:38:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 20:38:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:38:09,174 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-12-06 20:38:09,174 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 2 case distinctions, treesize of input 14 treesize of output 29 [2021-12-06 20:38:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 20:38:10,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:38:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 2 proven. 220 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 20:38:16,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:38:16,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462351565] [2021-12-06 20:38:16,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462351565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:38:16,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:38:16,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-06 20:38:16,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447404521] [2021-12-06 20:38:16,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:38:16,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:38:16,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:38:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:38:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-12-06 20:38:16,598 INFO L87 Difference]: Start difference. First operand 22642 states and 33074 transitions. Second operand has 27 states, 26 states have (on average 6.230769230769231) internal successors, (162), 27 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:38:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:38:53,308 INFO L93 Difference]: Finished difference Result 54268 states and 79018 transitions. [2021-12-06 20:38:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 20:38:53,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 6.230769230769231) internal successors, (162), 27 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-06 20:38:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:38:53,362 INFO L225 Difference]: With dead ends: 54268 [2021-12-06 20:38:53,362 INFO L226 Difference]: Without dead ends: 54268 [2021-12-06 20:38:53,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 184 SyntacticMatches, 21 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=1325, Invalid=5647, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 20:38:53,363 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 700 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:38:53,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 775 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 570 Invalid, 0 Unknown, 464 Unchecked, 5.2s Time] [2021-12-06 20:38:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54268 states. [2021-12-06 20:38:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54268 to 26437. [2021-12-06 20:38:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26437 states, 26432 states have (on average 1.4661395278450364) internal successors, (38753), 26436 states have internal predecessors, (38753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:38:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26437 states to 26437 states and 38753 transitions. [2021-12-06 20:38:53,725 INFO L78 Accepts]: Start accepts. Automaton has 26437 states and 38753 transitions. Word has length 98 [2021-12-06 20:38:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:38:53,725 INFO L470 AbstractCegarLoop]: Abstraction has 26437 states and 38753 transitions. [2021-12-06 20:38:53,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 6.230769230769231) internal successors, (162), 27 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:38:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 26437 states and 38753 transitions. [2021-12-06 20:38:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 20:38:53,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:38:53,738 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:38:53,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2021-12-06 20:38:53,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:38:53,939 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-06 20:38:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:38:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1691856716, now seen corresponding path program 2 times [2021-12-06 20:38:53,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:38:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164996920] [2021-12-06 20:38:53,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:38:53,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:38:53,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:38:53,947 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:38:53,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6064e18-cf2e-4df0-913a-4b58e131622e/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-12-06 20:38:54,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:38:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:38:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 20:38:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:38:54,340 INFO L354 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2021-12-06 20:38:54,340 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 2 case distinctions, treesize of input 14 treesize of output 29 [2021-12-06 20:38:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 20:38:55,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:39:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 2 proven. 220 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 20:39:02,200 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:39:02,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164996920] [2021-12-06 20:39:02,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164996920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:39:02,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:39:02,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-06 20:39:02,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307695256] [2021-12-06 20:39:02,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:39:02,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:39:02,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:39:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:39:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-12-06 20:39:02,202 INFO L87 Difference]: Start difference. First operand 26437 states and 38753 transitions. Second operand has 27 states, 26 states have (on average 6.230769230769231) internal successors, (162), 27 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)