./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array12_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array12_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:24:22,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:24:22,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:24:22,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:24:22,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:24:22,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:24:22,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:24:22,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:24:22,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:24:22,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:24:22,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:24:22,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:24:22,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:24:22,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:24:22,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:24:22,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:24:22,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:24:22,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:24:22,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:24:22,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:24:22,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:24:22,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:24:22,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:24:22,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:24:22,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:24:22,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:24:22,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:24:22,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:24:22,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:24:22,718 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:24:22,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:24:22,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:24:22,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:24:22,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:24:22,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:24:22,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:24:22,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:24:22,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:24:22,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:24:22,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:24:22,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:24:22,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:24:22,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:24:22,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:24:22,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:24:22,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:24:22,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:24:22,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:24:22,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:24:22,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:24:22,761 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:24:22,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:24:22,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:24:22,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:24:22,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:24:22,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:24:22,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:24:22,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:24:22,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:24:22,766 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:24:22,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:24:22,766 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:24:22,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:24:22,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:24:22,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:24:22,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:24:22,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:24:22,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:24:22,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:24:22,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:24:22,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:24:22,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:24:22,771 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:24:22,771 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:24:22,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:24:22,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:24:22,772 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_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b [2021-11-19 05:24:23,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:24:23,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:24:23,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:24:23,111 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:24:23,112 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:24:23,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-patterns/array12_pattern.c [2021-11-19 05:24:23,192 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/data/0bdf86a20/b09a2e220c6347aa808666f69ce29dea/FLAG65f608f0d [2021-11-19 05:24:23,738 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:24:23,738 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/sv-benchmarks/c/array-patterns/array12_pattern.c [2021-11-19 05:24:23,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/data/0bdf86a20/b09a2e220c6347aa808666f69ce29dea/FLAG65f608f0d [2021-11-19 05:24:24,119 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/data/0bdf86a20/b09a2e220c6347aa808666f69ce29dea [2021-11-19 05:24:24,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:24:24,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:24:24,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:24:24,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:24:24,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:24:24,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29eca352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24, skipping insertion in model container [2021-11-19 05:24:24,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:24:24,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:24:24,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2021-11-19 05:24:24,343 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:24:24,351 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:24:24,363 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2021-11-19 05:24:24,375 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:24:24,388 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:24:24,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24 WrapperNode [2021-11-19 05:24:24,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:24:24,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:24:24,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:24:24,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:24:24,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,429 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2021-11-19 05:24:24,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:24:24,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:24:24,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:24:24,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:24:24,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:24:24,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:24:24,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:24:24,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:24:24,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (1/1) ... [2021-11-19 05:24:24,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:24:24,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:24,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:24:24,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:24:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:24:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 05:24:24,553 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 05:24:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:24:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:24:24,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:24:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:24:24,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:24:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:24:24,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:24:24,621 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:24:24,623 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:24:24,803 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:24:24,809 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:24:24,809 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-19 05:24:24,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:24 BoogieIcfgContainer [2021-11-19 05:24:24,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:24:24,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:24:24,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:24:24,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:24:24,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:24:24" (1/3) ... [2021-11-19 05:24:24,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361de097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:24, skipping insertion in model container [2021-11-19 05:24:24,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:24" (2/3) ... [2021-11-19 05:24:24,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361de097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:24:24, skipping insertion in model container [2021-11-19 05:24:24,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:24:24" (3/3) ... [2021-11-19 05:24:24,833 INFO L111 eAbstractionObserver]: Analyzing ICFG array12_pattern.c [2021-11-19 05:24:24,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:24:24,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:24:24,902 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:24:24,909 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-19 05:24:24,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:24:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:24:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 05:24:24,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:24,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:24,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2136223091, now seen corresponding path program 1 times [2021-11-19 05:24:24,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:24,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176422009] [2021-11-19 05:24:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:24,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:25,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:24:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:24:25,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:25,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176422009] [2021-11-19 05:24:25,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176422009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:25,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:25,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:24:25,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126726627] [2021-11-19 05:24:25,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:25,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 05:24:25,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:25,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 05:24:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:24:25,155 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:24:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:25,184 INFO L93 Difference]: Finished difference Result 57 states and 87 transitions. [2021-11-19 05:24:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:24:25,186 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-19 05:24:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:25,193 INFO L225 Difference]: With dead ends: 57 [2021-11-19 05:24:25,193 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 05:24:25,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:24:25,203 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:25,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:24:25,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 05:24:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-19 05:24:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:24:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-19 05:24:25,249 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-11-19 05:24:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:25,250 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-19 05:24:25,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:24:25,250 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-19 05:24:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 05:24:25,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:25,252 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:25,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:24:25,253 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1040942554, now seen corresponding path program 1 times [2021-11-19 05:24:25,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:25,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944678750] [2021-11-19 05:24:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:25,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:25,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:24:25,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574191574] [2021-11-19 05:24:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:25,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:25,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:25,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:24:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:25,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:24:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:24:25,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:24:25,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:25,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944678750] [2021-11-19 05:24:25,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:24:25,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574191574] [2021-11-19 05:24:25,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574191574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:25,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:25,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 05:24:25,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426692984] [2021-11-19 05:24:25,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:25,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:24:25,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:25,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:24:25,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:24:25,619 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:24:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:25,795 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-11-19 05:24:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:24:25,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-19 05:24:25,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:25,801 INFO L225 Difference]: With dead ends: 56 [2021-11-19 05:24:25,802 INFO L226 Difference]: Without dead ends: 38 [2021-11-19 05:24:25,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:24:25,806 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:25,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 49 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:24:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-19 05:24:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-11-19 05:24:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:24:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-19 05:24:25,826 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 27 [2021-11-19 05:24:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:25,826 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-19 05:24:25,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:24:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-19 05:24:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 05:24:25,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:25,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:25,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:26,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:26,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:26,034 INFO L85 PathProgramCache]: Analyzing trace with hash -66078307, now seen corresponding path program 1 times [2021-11-19 05:24:26,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:26,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049951407] [2021-11-19 05:24:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:26,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:26,068 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:24:26,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067409231] [2021-11-19 05:24:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:26,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:26,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:26,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:26,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:24:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:26,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:24:26,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:24:26,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:24:26,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:26,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049951407] [2021-11-19 05:24:26,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:24:26,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067409231] [2021-11-19 05:24:26,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067409231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:24:26,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:24:26,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:24:26,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292193098] [2021-11-19 05:24:26,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:24:26,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:24:26,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:24:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:24:26,292 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:24:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:26,364 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2021-11-19 05:24:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:24:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-11-19 05:24:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:26,369 INFO L225 Difference]: With dead ends: 59 [2021-11-19 05:24:26,369 INFO L226 Difference]: Without dead ends: 36 [2021-11-19 05:24:26,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:24:26,374 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:26,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:24:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-19 05:24:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-11-19 05:24:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:24:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-19 05:24:26,396 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 33 [2021-11-19 05:24:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:26,396 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-19 05:24:26,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:24:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-19 05:24:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 05:24:26,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:26,398 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:26,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:26,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:26,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:26,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1831364287, now seen corresponding path program 1 times [2021-11-19 05:24:26,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:26,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823220251] [2021-11-19 05:24:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:26,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:26,631 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:24:26,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031266318] [2021-11-19 05:24:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:26,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:26,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:26,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:24:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:24:26,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 05:24:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:26,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-19 05:24:26,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:24:27,584 INFO L354 Elim1Store]: treesize reduction 392, result has 0.3 percent of original size [2021-11-19 05:24:27,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-11-19 05:24:27,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2021-11-19 05:24:28,061 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-11-19 05:24:28,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 38 [2021-11-19 05:24:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:24:28,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:24:47,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:47,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823220251] [2021-11-19 05:24:47,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:24:47,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031266318] [2021-11-19 05:24:47,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031266318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:24:47,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:24:47,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-19 05:24:47,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656912097] [2021-11-19 05:24:47,342 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 05:24:47,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:24:47,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:47,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:24:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=446, Unknown=5, NotChecked=0, Total=552 [2021-11-19 05:24:47,344 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:24:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:47,708 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-11-19 05:24:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 05:24:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-11-19 05:24:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:47,711 INFO L225 Difference]: With dead ends: 71 [2021-11-19 05:24:47,712 INFO L226 Difference]: Without dead ends: 67 [2021-11-19 05:24:47,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=141, Invalid=610, Unknown=5, NotChecked=0, Total=756 [2021-11-19 05:24:47,713 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:47,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 189 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 151 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2021-11-19 05:24:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-19 05:24:47,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-11-19 05:24:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 05:24:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-11-19 05:24:47,732 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 37 [2021-11-19 05:24:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:47,733 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-11-19 05:24:47,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:24:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-11-19 05:24:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 05:24:47,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:47,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:47,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:47,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:47,969 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:47,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1155769123, now seen corresponding path program 2 times [2021-11-19 05:24:47,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:47,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559478492] [2021-11-19 05:24:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:47,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:47,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:24:47,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715942490] [2021-11-19 05:24:47,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:24:47,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:47,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:47,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:48,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:24:48,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:24:48,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:24:48,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:24:48,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:24:48,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:24:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:24:48,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:48,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559478492] [2021-11-19 05:24:48,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:24:48,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715942490] [2021-11-19 05:24:48,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715942490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:24:48,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:24:48,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-19 05:24:48,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946689385] [2021-11-19 05:24:48,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:24:48,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:24:48,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:24:48,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:24:48,302 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:24:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:48,696 INFO L93 Difference]: Finished difference Result 157 states and 193 transitions. [2021-11-19 05:24:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:24:48,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-11-19 05:24:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:48,699 INFO L225 Difference]: With dead ends: 157 [2021-11-19 05:24:48,700 INFO L226 Difference]: Without dead ends: 112 [2021-11-19 05:24:48,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:24:48,701 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 117 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:48,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 102 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:24:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-19 05:24:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2021-11-19 05:24:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 05:24:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2021-11-19 05:24:48,718 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 39 [2021-11-19 05:24:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:48,718 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2021-11-19 05:24:48,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:24:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2021-11-19 05:24:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 05:24:48,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:48,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:48,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:48,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:48,935 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1584262531, now seen corresponding path program 3 times [2021-11-19 05:24:48,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:48,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198123808] [2021-11-19 05:24:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:48,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:48,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:24:48,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758944758] [2021-11-19 05:24:48,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:24:48,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:48,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:48,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:48,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:24:49,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 05:24:49,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:24:49,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 05:24:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:49,444 INFO L354 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2021-11-19 05:24:49,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 69 [2021-11-19 05:24:49,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:24:49,559 INFO L354 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2021-11-19 05:24:49,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 63 [2021-11-19 05:24:49,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:24:49,827 INFO L354 Elim1Store]: treesize reduction 46, result has 48.9 percent of original size [2021-11-19 05:24:49,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 63 [2021-11-19 05:24:49,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:24:51,484 INFO L354 Elim1Store]: treesize reduction 110, result has 34.9 percent of original size [2021-11-19 05:24:51,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 122 [2021-11-19 05:24:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:24:52,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:24:52,537 INFO L354 Elim1Store]: treesize reduction 157, result has 37.5 percent of original size [2021-11-19 05:24:52,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 134 [2021-11-19 05:24:52,565 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-19 05:24:52,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:24:52,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 73 [2021-11-19 05:24:52,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:24:52,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 37 [2021-11-19 05:24:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:24:54,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:54,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198123808] [2021-11-19 05:24:54,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:24:54,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758944758] [2021-11-19 05:24:54,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758944758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:24:54,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:24:54,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2021-11-19 05:24:54,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813102382] [2021-11-19 05:24:54,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:24:54,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 05:24:54,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:54,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 05:24:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-11-19 05:24:54,019 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 05:24:56,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-19 05:24:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:57,393 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2021-11-19 05:24:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:24:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-11-19 05:24:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:57,396 INFO L225 Difference]: With dead ends: 111 [2021-11-19 05:24:57,396 INFO L226 Difference]: Without dead ends: 107 [2021-11-19 05:24:57,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 05:24:57,398 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:57,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 155 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 186 Invalid, 1 Unknown, 101 Unchecked, 2.4s Time] [2021-11-19 05:24:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-19 05:24:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-11-19 05:24:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 68 states have internal predecessors, (77), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 05:24:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2021-11-19 05:24:57,414 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 39 [2021-11-19 05:24:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:57,414 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2021-11-19 05:24:57,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 05:24:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2021-11-19 05:24:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 05:24:57,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:57,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:57,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:57,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 05:24:57,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:57,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:57,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2076840219, now seen corresponding path program 4 times [2021-11-19 05:24:57,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:57,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772563937] [2021-11-19 05:24:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:57,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:57,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:24:57,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455166341] [2021-11-19 05:24:57,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:24:57,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:57,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:57,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:57,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:24:57,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:24:57,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:24:57,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:24:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:24:57,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:24:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 05:24:57,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:57,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772563937] [2021-11-19 05:24:57,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:24:57,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455166341] [2021-11-19 05:24:57,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455166341] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:24:57,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:24:57,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-19 05:24:57,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539645553] [2021-11-19 05:24:57,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:24:57,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:24:57,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:24:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:24:57,954 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:24:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:58,488 INFO L93 Difference]: Finished difference Result 183 states and 212 transitions. [2021-11-19 05:24:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:24:58,489 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-11-19 05:24:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:58,491 INFO L225 Difference]: With dead ends: 183 [2021-11-19 05:24:58,491 INFO L226 Difference]: Without dead ends: 167 [2021-11-19 05:24:58,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:24:58,493 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:58,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 111 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:24:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-19 05:24:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 86. [2021-11-19 05:24:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 75 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 05:24:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2021-11-19 05:24:58,512 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 41 [2021-11-19 05:24:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:58,512 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2021-11-19 05:24:58,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:24:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2021-11-19 05:24:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 05:24:58,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:58,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:58,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:58,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 05:24:58,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:58,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash -624697650, now seen corresponding path program 5 times [2021-11-19 05:24:58,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:58,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666935024] [2021-11-19 05:24:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:58,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:58,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:24:58,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967745827] [2021-11-19 05:24:58,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:24:58,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:58,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:58,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:58,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:24:58,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-19 05:24:58,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:24:58,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:24:58,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:24:58,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:24:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:24:59,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:59,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666935024] [2021-11-19 05:24:59,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:24:59,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967745827] [2021-11-19 05:24:59,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967745827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:24:59,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:24:59,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-19 05:24:59,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117597855] [2021-11-19 05:24:59,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:24:59,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:24:59,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:24:59,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:24:59,039 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:24:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:24:59,282 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2021-11-19 05:24:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:24:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-11-19 05:24:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:24:59,284 INFO L225 Difference]: With dead ends: 124 [2021-11-19 05:24:59,284 INFO L226 Difference]: Without dead ends: 88 [2021-11-19 05:24:59,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:24:59,285 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:24:59,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 105 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:24:59,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-19 05:24:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2021-11-19 05:24:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.161764705882353) internal successors, (79), 70 states have internal predecessors, (79), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 05:24:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-11-19 05:24:59,305 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 42 [2021-11-19 05:24:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:24:59,306 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-11-19 05:24:59,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:24:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-11-19 05:24:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 05:24:59,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:24:59,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:24:59,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:24:59,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 05:24:59,528 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:24:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:24:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1532894260, now seen corresponding path program 6 times [2021-11-19 05:24:59,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:24:59,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349157845] [2021-11-19 05:24:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:24:59,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:24:59,534 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:24:59,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610944087] [2021-11-19 05:24:59,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:24:59,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:24:59,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:59,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:24:59,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:24:59,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 05:24:59,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:24:59,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:24:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:24:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:24:59,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:24:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:24:59,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:24:59,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349157845] [2021-11-19 05:24:59,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:24:59,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610944087] [2021-11-19 05:24:59,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610944087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:24:59,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:24:59,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-19 05:24:59,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164212592] [2021-11-19 05:24:59,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:24:59,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:24:59,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:24:59,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:24:59,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:24:59,840 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:25:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:00,080 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2021-11-19 05:25:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:25:00,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-19 05:25:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:00,082 INFO L225 Difference]: With dead ends: 93 [2021-11-19 05:25:00,082 INFO L226 Difference]: Without dead ends: 59 [2021-11-19 05:25:00,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:25:00,083 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:00,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 87 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:25:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-19 05:25:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-11-19 05:25:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 44 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 05:25:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-19 05:25:00,091 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 44 [2021-11-19 05:25:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:00,091 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-19 05:25:00,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:25:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-19 05:25:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 05:25:00,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:00,093 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:00,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:00,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:00,319 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:00,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1334685611, now seen corresponding path program 7 times [2021-11-19 05:25:00,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:00,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189237740] [2021-11-19 05:25:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:00,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:00,327 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:25:00,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117300795] [2021-11-19 05:25:00,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:25:00,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:00,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:00,328 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:00,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:25:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:25:00,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 05:25:00,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 05:25:00,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:00,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189237740] [2021-11-19 05:25:00,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:25:00,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117300795] [2021-11-19 05:25:00,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117300795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:00,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:25:00,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-19 05:25:00,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612117875] [2021-11-19 05:25:00,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:00,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:25:00,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:25:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:25:00,695 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:25:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:01,090 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-11-19 05:25:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:25:01,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2021-11-19 05:25:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:01,092 INFO L225 Difference]: With dead ends: 68 [2021-11-19 05:25:01,092 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 05:25:01,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:25:01,093 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:01,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 68 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:25:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 05:25:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-11-19 05:25:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.14) internal successors, (57), 51 states have internal predecessors, (57), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 05:25:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-11-19 05:25:01,101 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 48 [2021-11-19 05:25:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:01,102 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-11-19 05:25:01,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:25:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-11-19 05:25:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 05:25:01,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:01,103 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:01,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:01,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 05:25:01,319 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:01,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1249277894, now seen corresponding path program 8 times [2021-11-19 05:25:01,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:01,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652112099] [2021-11-19 05:25:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:01,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:01,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:25:01,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283503139] [2021-11-19 05:25:01,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:25:01,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:01,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:01,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:01,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:25:01,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:25:01,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:25:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-19 05:25:01,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:01,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-19 05:25:01,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-19 05:25:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 99 [2021-11-19 05:25:02,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 7 [2021-11-19 05:25:02,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:25:02,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 96 [2021-11-19 05:25:02,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 26 [2021-11-19 05:25:02,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:25:02,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 115 [2021-11-19 05:25:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:02,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 39 [2021-11-19 05:25:03,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:03,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:03,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:03,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:03,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:03,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:05,506 INFO L354 Elim1Store]: treesize reduction 899, result has 27.4 percent of original size [2021-11-19 05:25:05,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 145 treesize of output 421 [2021-11-19 05:25:16,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:25:16,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:16,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:17,286 INFO L354 Elim1Store]: treesize reduction 150, result has 52.2 percent of original size [2021-11-19 05:25:17,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 29 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 534 treesize of output 500 [2021-11-19 05:25:29,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:25:29,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:29,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:25:30,550 INFO L354 Elim1Store]: treesize reduction 1002, result has 12.5 percent of original size [2021-11-19 05:25:30,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 10 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 381 treesize of output 294 [2021-11-19 05:25:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:25:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:37,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:37,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652112099] [2021-11-19 05:25:37,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:25:37,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283503139] [2021-11-19 05:25:37,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283503139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:25:37,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:25:37,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-19 05:25:37,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17300360] [2021-11-19 05:25:37,848 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:37,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 05:25:37,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 05:25:37,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 05:25:37,851 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:25:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:39,355 INFO L93 Difference]: Finished difference Result 165 states and 195 transitions. [2021-11-19 05:25:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:25:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2021-11-19 05:25:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:39,357 INFO L225 Difference]: With dead ends: 165 [2021-11-19 05:25:39,357 INFO L226 Difference]: Without dead ends: 161 [2021-11-19 05:25:39,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=386, Invalid=2476, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 05:25:39,360 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 79 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:39,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 272 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 279 Invalid, 0 Unknown, 422 Unchecked, 1.0s Time] [2021-11-19 05:25:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-19 05:25:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2021-11-19 05:25:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 05:25:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2021-11-19 05:25:39,379 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 55 [2021-11-19 05:25:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:39,379 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2021-11-19 05:25:39,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:25:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2021-11-19 05:25:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 05:25:39,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:39,381 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:39,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:39,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:39,595 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1328435676, now seen corresponding path program 9 times [2021-11-19 05:25:39,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:39,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548931259] [2021-11-19 05:25:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:39,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:39,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:25:39,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046915809] [2021-11-19 05:25:39,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:25:39,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:39,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:39,603 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:39,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 05:25:39,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 05:25:39,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:25:39,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:25:39,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 05:25:39,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 05:25:40,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:40,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548931259] [2021-11-19 05:25:40,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:25:40,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046915809] [2021-11-19 05:25:40,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046915809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:40,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:25:40,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-19 05:25:40,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804862334] [2021-11-19 05:25:40,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:40,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:25:40,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:40,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:25:40,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:25:40,111 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:25:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:40,713 INFO L93 Difference]: Finished difference Result 200 states and 231 transitions. [2021-11-19 05:25:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:25:40,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2021-11-19 05:25:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:40,716 INFO L225 Difference]: With dead ends: 200 [2021-11-19 05:25:40,716 INFO L226 Difference]: Without dead ends: 158 [2021-11-19 05:25:40,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:25:40,717 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 51 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:40,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 138 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:25:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-19 05:25:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2021-11-19 05:25:40,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 133 states have internal predecessors, (150), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 05:25:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 174 transitions. [2021-11-19 05:25:40,741 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 174 transitions. Word has length 57 [2021-11-19 05:25:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:40,742 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 174 transitions. [2021-11-19 05:25:40,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:25:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 174 transitions. [2021-11-19 05:25:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 05:25:40,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:40,744 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:40,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-19 05:25:40,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 05:25:40,949 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1874529176, now seen corresponding path program 10 times [2021-11-19 05:25:40,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:40,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432974410] [2021-11-19 05:25:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:40,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:40,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:25:40,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905152552] [2021-11-19 05:25:40,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:25:40,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:40,957 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:40,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 05:25:41,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:25:41,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:25:41,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:25:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:25:41,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 05:25:41,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:41,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432974410] [2021-11-19 05:25:41,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:25:41,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905152552] [2021-11-19 05:25:41,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905152552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:41,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:25:41,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-19 05:25:41,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273663552] [2021-11-19 05:25:41,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:41,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:25:41,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:41,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:25:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:25:41,317 INFO L87 Difference]: Start difference. First operand 151 states and 174 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:25:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:41,526 INFO L93 Difference]: Finished difference Result 207 states and 235 transitions. [2021-11-19 05:25:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:25:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-11-19 05:25:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:41,529 INFO L225 Difference]: With dead ends: 207 [2021-11-19 05:25:41,529 INFO L226 Difference]: Without dead ends: 159 [2021-11-19 05:25:41,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:25:41,530 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:41,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 92 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:25:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-19 05:25:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 145. [2021-11-19 05:25:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 127 states have internal predecessors, (138), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 05:25:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2021-11-19 05:25:41,553 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 57 [2021-11-19 05:25:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:41,553 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2021-11-19 05:25:41,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 05:25:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2021-11-19 05:25:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 05:25:41,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:41,555 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:41,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:41,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 05:25:41,779 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1705219253, now seen corresponding path program 11 times [2021-11-19 05:25:41,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:41,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821712148] [2021-11-19 05:25:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:41,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:41,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:25:41,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827264009] [2021-11-19 05:25:41,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:25:41,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:41,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:41,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 05:25:41,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-19 05:25:41,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:25:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:25:41,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 05:25:42,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 05:25:42,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:42,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821712148] [2021-11-19 05:25:42,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:25:42,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827264009] [2021-11-19 05:25:42,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827264009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:42,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:25:42,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-19 05:25:42,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277820284] [2021-11-19 05:25:42,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:42,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 05:25:42,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 05:25:42,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:25:42,180 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:25:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:42,580 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2021-11-19 05:25:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:25:42,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2021-11-19 05:25:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:42,583 INFO L225 Difference]: With dead ends: 183 [2021-11-19 05:25:42,583 INFO L226 Difference]: Without dead ends: 125 [2021-11-19 05:25:42,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:25:42,585 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 96 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:42,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 80 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:25:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-19 05:25:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2021-11-19 05:25:42,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 98 states have (on average 1.0918367346938775) internal successors, (107), 99 states have internal predecessors, (107), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:25:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2021-11-19 05:25:42,602 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 62 [2021-11-19 05:25:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:42,603 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2021-11-19 05:25:42,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:25:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2021-11-19 05:25:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 05:25:42,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:42,604 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:42,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:42,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 05:25:42,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1763746438, now seen corresponding path program 12 times [2021-11-19 05:25:42,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:42,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441609068] [2021-11-19 05:25:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:42,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:42,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:25:42,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484997068] [2021-11-19 05:25:42,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:25:42,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:42,835 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:42,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 05:25:43,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-19 05:25:43,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:25:43,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:25:43,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 05:25:43,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:25:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 05:25:43,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:43,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441609068] [2021-11-19 05:25:43,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:25:43,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484997068] [2021-11-19 05:25:43,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484997068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:25:43,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:25:43,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-19 05:25:43,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657478391] [2021-11-19 05:25:43,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:25:43,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 05:25:43,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 05:25:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:25:43,441 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:25:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:43,963 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2021-11-19 05:25:43,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:25:43,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 63 [2021-11-19 05:25:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:43,966 INFO L225 Difference]: With dead ends: 186 [2021-11-19 05:25:43,966 INFO L226 Difference]: Without dead ends: 147 [2021-11-19 05:25:43,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-11-19 05:25:43,967 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:43,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 98 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:25:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-19 05:25:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 131. [2021-11-19 05:25:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 117 states have internal predecessors, (127), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:25:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2021-11-19 05:25:43,994 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 63 [2021-11-19 05:25:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:43,995 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2021-11-19 05:25:43,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:25:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2021-11-19 05:25:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 05:25:44,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:44,004 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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] [2021-11-19 05:25:44,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 05:25:44,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 05:25:44,227 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1511383042, now seen corresponding path program 1 times [2021-11-19 05:25:44,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:44,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187870163] [2021-11-19 05:25:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:44,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:44,233 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:25:44,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988778832] [2021-11-19 05:25:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:44,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:25:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:25:44,234 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:25:44,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 05:25:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-19 05:25:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:25:45,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-19 05:25:45,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:45,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:45,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:45,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 99 [2021-11-19 05:25:45,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:46,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 7 [2021-11-19 05:25:46,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:25:46,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 96 [2021-11-19 05:25:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 23 [2021-11-19 05:25:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:25:46,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 115 [2021-11-19 05:25:46,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:46,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 22 [2021-11-19 05:25:47,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:50,075 INFO L354 Elim1Store]: treesize reduction 956, result has 26.4 percent of original size [2021-11-19 05:25:50,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 157 treesize of output 428 [2021-11-19 05:25:50,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:50,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:51,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:51,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:52,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:52,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:52,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:52,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:52,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:53,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:53,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:53,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:53,817 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:54,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:55,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:55,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:25:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:25:56,530 INFO L354 Elim1Store]: treesize reduction 30, result has 75.6 percent of original size [2021-11-19 05:25:56,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 437 treesize of output 411 [2021-11-19 05:26:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:26:15,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:26:15,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:26:15,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:26:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:26:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:26:19,275 INFO L354 Elim1Store]: treesize reduction 1302, result has 23.8 percent of original size [2021-11-19 05:26:19,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 324 treesize of output 544 [2021-11-19 05:27:27,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:27:27,813 INFO L354 Elim1Store]: treesize reduction 30, result has 75.6 percent of original size [2021-11-19 05:27:27,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 874 treesize of output 657 [2021-11-19 05:31:22,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:31:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:31:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:31:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:31:22,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:31:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:31:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:31:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:31:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:31:22,407 INFO L354 Elim1Store]: treesize reduction 90, result has 62.7 percent of original size [2021-11-19 05:31:22,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 539 treesize of output 449 [2021-11-19 05:31:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:31:36,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:32:25,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:32:25,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187870163] [2021-11-19 05:32:25,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:32:25,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988778832] [2021-11-19 05:32:25,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988778832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:32:25,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:32:25,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-11-19 05:32:25,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588256947] [2021-11-19 05:32:25,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 05:32:25,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-19 05:32:25,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:32:25,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-19 05:32:25,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2868, Unknown=3, NotChecked=0, Total=3192 [2021-11-19 05:32:25,510 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 41 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 34 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 05:32:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:32:28,653 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2021-11-19 05:32:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 05:32:28,654 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 34 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 68 [2021-11-19 05:32:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:32:28,655 INFO L225 Difference]: With dead ends: 167 [2021-11-19 05:32:28,655 INFO L226 Difference]: Without dead ends: 147 [2021-11-19 05:32:28,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=391, Invalid=3512, Unknown=3, NotChecked=0, Total=3906 [2021-11-19 05:32:28,657 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:32:28,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 365 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 266 Invalid, 0 Unknown, 432 Unchecked, 0.6s Time] [2021-11-19 05:32:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-19 05:32:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-11-19 05:32:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 125 states have (on average 1.088) internal successors, (136), 126 states have internal predecessors, (136), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-19 05:32:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2021-11-19 05:32:28,678 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 68 [2021-11-19 05:32:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:32:28,679 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2021-11-19 05:32:28,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 34 states have internal predecessors, (52), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 05:32:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2021-11-19 05:32:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 05:32:28,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:32:28,681 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:32:28,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 05:32:28,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:28,891 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:32:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:32:28,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1305767226, now seen corresponding path program 2 times [2021-11-19 05:32:28,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:32:28,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367470838] [2021-11-19 05:32:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:28,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:32:28,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:32:28,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739278747] [2021-11-19 05:32:28,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:32:28,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:28,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:32:28,901 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:32:28,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01e26b8-0a2c-4792-9da1-b743e529e323/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 05:32:33,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:32:33,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:32:33,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-19 05:32:33,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:32:33,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-19 05:32:33,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-19 05:32:33,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:33,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:33,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 99 [2021-11-19 05:32:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 7 [2021-11-19 05:32:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:32:34,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 134 [2021-11-19 05:32:34,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 24 [2021-11-19 05:32:34,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:32:34,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 115 [2021-11-19 05:32:34,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:34,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2021-11-19 05:32:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:36,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:36,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:36,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:36,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:36,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:36,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:40,070 INFO L354 Elim1Store]: treesize reduction 956, result has 26.4 percent of original size [2021-11-19 05:32:40,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 157 treesize of output 428 [2021-11-19 05:32:40,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:32:40,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:32:41,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:32:41,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:32:42,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:32:43,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:32:43,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:32:43,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:32:45,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:32:45,845 INFO L354 Elim1Store]: treesize reduction 30, result has 75.6 percent of original size [2021-11-19 05:32:45,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 164 treesize of output 191 [2021-11-19 05:33:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:33:35,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:33:35,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:33:35,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:33:35,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:33:35,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:33:35,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:33:41,283 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 182 DAG size of output: 97 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 05:33:41,284 INFO L354 Elim1Store]: treesize reduction 1372, result has 22.9 percent of original size [2021-11-19 05:33:41,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 346 treesize of output 560 [2021-11-19 05:35:43,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:44,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:44,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:44,870 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:46,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:47,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:47,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:48,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:49,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:49,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:50,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:53,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:54,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:55,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:35:56,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:36:01,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:36:01,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:36:03,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:36:03,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:36:04,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:36:06,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:36:06,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:36:07,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 05:36:14,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:14,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:14,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:14,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:14,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:14,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:14,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:14,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:14,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 05:36:15,023 INFO L354 Elim1Store]: treesize reduction 30, result has 75.6 percent of original size [2021-11-19 05:36:15,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1531 treesize of output 1307