./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de61.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_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/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_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de61.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/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_9084314b-7b25-4463-8dee-60c023eac36b/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 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:22:26,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:22:26,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:22:26,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:22:26,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:22:26,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:22:26,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:22:26,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:22:26,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:22:26,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:22:26,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:22:26,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:22:26,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:22:26,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:22:26,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:22:26,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:22:26,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:22:26,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:22:26,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:22:26,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:22:26,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:22:26,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:22:26,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:22:26,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:22:26,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:22:26,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:22:26,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:22:26,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:22:26,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:22:26,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:22:26,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:22:26,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:22:26,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:22:26,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:22:26,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:22:26,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:22:26,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:22:26,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:22:26,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:22:26,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:22:26,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:22:26,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:22:26,743 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:22:26,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:22:26,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:22:26,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:22:26,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:22:26,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:22:26,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:22:26,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:22:26,755 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:22:26,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:22:26,757 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:22:26,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:22:26,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:22:26,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:22:26,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:22:26,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:22:26,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:22:26,759 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:22:26,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:22:26,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:22:26,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:22:26,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:22:26,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:22:26,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:22:26,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:22:26,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:22:26,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:22:26,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:22:26,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:22:26,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:22:26,764 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:22:26,765 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:22:26,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:22:26,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:22:26,766 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_9084314b-7b25-4463-8dee-60c023eac36b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 [2021-11-19 04:22:27,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:22:27,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:22:27,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:22:27,204 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:22:27,205 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:22:27,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/loops-crafted-1/in-de61.c [2021-11-19 04:22:27,302 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/data/64f815ff1/2cd750f75eec48668b4de28028dc62d7/FLAGd393624a9 [2021-11-19 04:22:27,796 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:22:27,797 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/sv-benchmarks/c/loops-crafted-1/in-de61.c [2021-11-19 04:22:27,803 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/data/64f815ff1/2cd750f75eec48668b4de28028dc62d7/FLAGd393624a9 [2021-11-19 04:22:28,170 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/data/64f815ff1/2cd750f75eec48668b4de28028dc62d7 [2021-11-19 04:22:28,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:22:28,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:22:28,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:22:28,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:22:28,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:22:28,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0f2cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28, skipping insertion in model container [2021-11-19 04:22:28,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:22:28,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:22:28,391 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_9084314b-7b25-4463-8dee-60c023eac36b/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2021-11-19 04:22:28,423 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:22:28,433 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:22:28,458 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_9084314b-7b25-4463-8dee-60c023eac36b/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2021-11-19 04:22:28,479 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:22:28,496 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:22:28,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28 WrapperNode [2021-11-19 04:22:28,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:22:28,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:22:28,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:22:28,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:22:28,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,554 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-11-19 04:22:28,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:22:28,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:22:28,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:22:28,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:22:28,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:22:28,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:22:28,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:22:28,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:22:28,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (1/1) ... [2021-11-19 04:22:28,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:22:28,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:28,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:22:28,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:22:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:22:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:22:28,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:22:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:22:28,797 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:22:28,799 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:22:28,973 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:22:28,980 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:22:28,985 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-19 04:22:28,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:22:28 BoogieIcfgContainer [2021-11-19 04:22:28,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:22:28,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:22:28,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:22:28,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:22:28,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:22:28" (1/3) ... [2021-11-19 04:22:28,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbbc6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:22:28, skipping insertion in model container [2021-11-19 04:22:28,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:28" (2/3) ... [2021-11-19 04:22:28,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbbc6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:22:28, skipping insertion in model container [2021-11-19 04:22:28,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:22:28" (3/3) ... [2021-11-19 04:22:29,000 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de61.c [2021-11-19 04:22:29,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:22:29,021 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:22:29,074 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:22:29,083 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 04:22:29,083 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:22:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:22:29,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:29,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:29,108 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2021-11-19 04:22:29,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:29,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169786117] [2021-11-19 04:22:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:29,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:29,280 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 04:22:29,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:29,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169786117] [2021-11-19 04:22:29,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169786117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:22:29,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:22:29,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:22:29,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671980528] [2021-11-19 04:22:29,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:22:29,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:22:29,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:29,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:22:29,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:22:29,324 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:29,341 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2021-11-19 04:22:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:22:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 04:22:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:29,353 INFO L225 Difference]: With dead ends: 31 [2021-11-19 04:22:29,353 INFO L226 Difference]: Without dead ends: 13 [2021-11-19 04:22:29,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 04:22:29,361 INFO L933 BasicCegarLoop]: 22 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, 22 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 04:22:29,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:22:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-19 04:22:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-19 04:22:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2021-11-19 04:22:29,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2021-11-19 04:22:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:29,402 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-11-19 04:22:29,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2021-11-19 04:22:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:22:29,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:29,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:29,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:22:29,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:29,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2021-11-19 04:22:29,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:29,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4639623] [2021-11-19 04:22:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:29,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:29,979 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 04:22:29,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:29,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4639623] [2021-11-19 04:22:29,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4639623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:22:29,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:22:29,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:22:29,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249762896] [2021-11-19 04:22:29,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:22:29,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:22:29,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:22:29,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:22:29,985 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:30,115 INFO L93 Difference]: Finished difference Result 31 states and 46 transitions. [2021-11-19 04:22:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:22:30,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 04:22:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:30,117 INFO L225 Difference]: With dead ends: 31 [2021-11-19 04:22:30,117 INFO L226 Difference]: Without dead ends: 14 [2021-11-19 04:22:30,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:22:30,120 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:30,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 34 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:22:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-19 04:22:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-19 04:22:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-11-19 04:22:30,128 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2021-11-19 04:22:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:30,128 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-11-19 04:22:30,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-11-19 04:22:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:22:30,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:30,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:30,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:22:30,131 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1427170164, now seen corresponding path program 1 times [2021-11-19 04:22:30,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:30,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772538050] [2021-11-19 04:22:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:30,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:30,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:30,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772538050] [2021-11-19 04:22:30,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772538050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:30,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570580802] [2021-11-19 04:22:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:30,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:30,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:30,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:30,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:22:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:30,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:22:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:30,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:30,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570580802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:30,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:30,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-19 04:22:30,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599549544] [2021-11-19 04:22:30,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:30,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:22:30,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:22:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:22:30,504 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:30,673 INFO L93 Difference]: Finished difference Result 58 states and 94 transitions. [2021-11-19 04:22:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:22:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-19 04:22:30,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:30,676 INFO L225 Difference]: With dead ends: 58 [2021-11-19 04:22:30,676 INFO L226 Difference]: Without dead ends: 50 [2021-11-19 04:22:30,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:22:30,679 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:30,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 55 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:22:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-19 04:22:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-11-19 04:22:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 55 transitions. [2021-11-19 04:22:30,688 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 55 transitions. Word has length 13 [2021-11-19 04:22:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:30,689 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 55 transitions. [2021-11-19 04:22:30,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 55 transitions. [2021-11-19 04:22:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 04:22:30,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:30,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:30,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:30,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:30,910 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash -603304611, now seen corresponding path program 1 times [2021-11-19 04:22:30,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:30,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962542795] [2021-11-19 04:22:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:30,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:31,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:31,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962542795] [2021-11-19 04:22:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962542795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:31,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672683779] [2021-11-19 04:22:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:31,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:31,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:31,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:31,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:22:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:31,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:22:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:22:31,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:22:31,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672683779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:31,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:31,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2021-11-19 04:22:31,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733678952] [2021-11-19 04:22:31,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:31,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:22:31,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:22:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:22:31,232 INFO L87 Difference]: Start difference. First operand 37 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:31,601 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2021-11-19 04:22:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:22:31,602 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-19 04:22:31,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:31,604 INFO L225 Difference]: With dead ends: 107 [2021-11-19 04:22:31,604 INFO L226 Difference]: Without dead ends: 87 [2021-11-19 04:22:31,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:22:31,614 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:31,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 107 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:22:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-19 04:22:31,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 49. [2021-11-19 04:22:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2021-11-19 04:22:31,627 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 15 [2021-11-19 04:22:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:31,628 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2021-11-19 04:22:31,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2021-11-19 04:22:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:22:31,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:31,631 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:31,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:31,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:31,858 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash 114935591, now seen corresponding path program 2 times [2021-11-19 04:22:31,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:31,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521056848] [2021-11-19 04:22:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:31,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:32,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:32,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521056848] [2021-11-19 04:22:32,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521056848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:32,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024099671] [2021-11-19 04:22:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:22:32,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:32,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:32,062 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:32,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:22:32,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:22:32,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:32,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:22:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:32,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:32,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024099671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:32,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:32,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-19 04:22:32,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539236779] [2021-11-19 04:22:32,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:32,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:22:32,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:32,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:22:32,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:22:32,375 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:33,572 INFO L93 Difference]: Finished difference Result 188 states and 307 transitions. [2021-11-19 04:22:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:22:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-19 04:22:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:33,575 INFO L225 Difference]: With dead ends: 188 [2021-11-19 04:22:33,575 INFO L226 Difference]: Without dead ends: 174 [2021-11-19 04:22:33,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:22:33,577 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:33,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 169 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:22:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-19 04:22:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 106. [2021-11-19 04:22:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 105 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 157 transitions. [2021-11-19 04:22:33,594 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 157 transitions. Word has length 16 [2021-11-19 04:22:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:33,595 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 157 transitions. [2021-11-19 04:22:33,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 157 transitions. [2021-11-19 04:22:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 04:22:33,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:33,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:33,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:33,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:33,810 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2021-11-19 04:22:33,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:33,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814331821] [2021-11-19 04:22:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:33,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:22:34,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:34,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814331821] [2021-11-19 04:22:34,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814331821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:34,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596732437] [2021-11-19 04:22:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:34,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:34,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:34,334 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:34,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:22:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:34,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 04:22:34,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:34,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:22:35,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596732437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:35,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:35,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 22 [2021-11-19 04:22:35,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856082590] [2021-11-19 04:22:35,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:35,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 04:22:35,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:35,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 04:22:35,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:22:35,452 INFO L87 Difference]: Start difference. First operand 106 states and 157 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:38,667 INFO L93 Difference]: Finished difference Result 212 states and 300 transitions. [2021-11-19 04:22:38,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-19 04:22:38,667 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-19 04:22:38,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:38,669 INFO L225 Difference]: With dead ends: 212 [2021-11-19 04:22:38,669 INFO L226 Difference]: Without dead ends: 200 [2021-11-19 04:22:38,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=444, Invalid=1812, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 04:22:38,672 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:38,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 108 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:22:38,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-19 04:22:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 119. [2021-11-19 04:22:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5423728813559323) internal successors, (182), 118 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 182 transitions. [2021-11-19 04:22:38,698 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 182 transitions. Word has length 18 [2021-11-19 04:22:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:38,698 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 182 transitions. [2021-11-19 04:22:38,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 182 transitions. [2021-11-19 04:22:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 04:22:38,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:38,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:38,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:38,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 04:22:38,921 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:38,922 INFO L85 PathProgramCache]: Analyzing trace with hash 748617255, now seen corresponding path program 2 times [2021-11-19 04:22:38,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:38,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876767813] [2021-11-19 04:22:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:38,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:39,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:39,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876767813] [2021-11-19 04:22:39,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876767813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:39,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980952599] [2021-11-19 04:22:39,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:22:39,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:39,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:39,077 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:39,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:22:39,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:22:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:22:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:22:39,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:22:39,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980952599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:39,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:39,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2021-11-19 04:22:39,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614136926] [2021-11-19 04:22:39,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:39,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:22:39,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:39,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:22:39,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:22:39,274 INFO L87 Difference]: Start difference. First operand 119 states and 182 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:40,209 INFO L93 Difference]: Finished difference Result 341 states and 489 transitions. [2021-11-19 04:22:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 04:22:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-19 04:22:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:40,212 INFO L225 Difference]: With dead ends: 341 [2021-11-19 04:22:40,212 INFO L226 Difference]: Without dead ends: 301 [2021-11-19 04:22:40,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:22:40,215 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:40,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 122 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:22:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-19 04:22:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 150. [2021-11-19 04:22:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.5100671140939597) internal successors, (225), 149 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 225 transitions. [2021-11-19 04:22:40,236 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 225 transitions. Word has length 18 [2021-11-19 04:22:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:40,237 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 225 transitions. [2021-11-19 04:22:40,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 225 transitions. [2021-11-19 04:22:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 04:22:40,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:40,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:40,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:40,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:40,458 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:40,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1346970424, now seen corresponding path program 2 times [2021-11-19 04:22:40,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:40,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388795706] [2021-11-19 04:22:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:40,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:22:40,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:40,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388795706] [2021-11-19 04:22:40,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388795706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:40,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643445780] [2021-11-19 04:22:40,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:22:40,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:40,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:40,558 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:40,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:22:40,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:22:40,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:22:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:22:40,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:22:40,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643445780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:40,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:40,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-11-19 04:22:40,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18437949] [2021-11-19 04:22:40,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:40,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:22:40,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:22:40,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:22:40,726 INFO L87 Difference]: Start difference. First operand 150 states and 225 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:40,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:40,757 INFO L93 Difference]: Finished difference Result 245 states and 367 transitions. [2021-11-19 04:22:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:22:40,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-19 04:22:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:40,760 INFO L225 Difference]: With dead ends: 245 [2021-11-19 04:22:40,760 INFO L226 Difference]: Without dead ends: 183 [2021-11-19 04:22:40,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:22:40,762 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:40,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:22:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-19 04:22:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 147. [2021-11-19 04:22:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 216 transitions. [2021-11-19 04:22:40,808 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 216 transitions. Word has length 20 [2021-11-19 04:22:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:40,808 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 216 transitions. [2021-11-19 04:22:40,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 216 transitions. [2021-11-19 04:22:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:22:40,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:40,813 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:40,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:41,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:41,018 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 48319293, now seen corresponding path program 1 times [2021-11-19 04:22:41,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:41,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458309659] [2021-11-19 04:22:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:41,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:22:41,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:41,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458309659] [2021-11-19 04:22:41,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458309659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:41,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350264799] [2021-11-19 04:22:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:41,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:41,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:41,125 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:41,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:22:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:22:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:22:41,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:22:41,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350264799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:41,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:41,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2021-11-19 04:22:41,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984456957] [2021-11-19 04:22:41,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:41,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:22:41,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:22:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:22:41,411 INFO L87 Difference]: Start difference. First operand 147 states and 216 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:41,822 INFO L93 Difference]: Finished difference Result 235 states and 339 transitions. [2021-11-19 04:22:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:22:41,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-19 04:22:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:41,824 INFO L225 Difference]: With dead ends: 235 [2021-11-19 04:22:41,824 INFO L226 Difference]: Without dead ends: 186 [2021-11-19 04:22:41,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:22:41,826 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:41,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 144 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:22:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-19 04:22:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2021-11-19 04:22:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4859154929577465) internal successors, (211), 142 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 211 transitions. [2021-11-19 04:22:41,840 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 211 transitions. Word has length 21 [2021-11-19 04:22:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:41,840 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 211 transitions. [2021-11-19 04:22:41,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:41,841 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 211 transitions. [2021-11-19 04:22:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:22:41,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:41,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:41,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:42,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-19 04:22:42,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1411583389, now seen corresponding path program 3 times [2021-11-19 04:22:42,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:42,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699017225] [2021-11-19 04:22:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:42,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:42,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:42,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699017225] [2021-11-19 04:22:42,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699017225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:42,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791067239] [2021-11-19 04:22:42,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:22:42,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:42,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:42,216 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:42,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:22:42,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 04:22:42,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:22:42,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:22:42,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:22:42,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791067239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:42,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:42,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2021-11-19 04:22:42,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319460364] [2021-11-19 04:22:42,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:42,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:22:42,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:42,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:22:42,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:22:42,456 INFO L87 Difference]: Start difference. First operand 143 states and 211 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:44,706 INFO L93 Difference]: Finished difference Result 414 states and 573 transitions. [2021-11-19 04:22:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-19 04:22:44,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-19 04:22:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:44,709 INFO L225 Difference]: With dead ends: 414 [2021-11-19 04:22:44,710 INFO L226 Difference]: Without dead ends: 378 [2021-11-19 04:22:44,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2021-11-19 04:22:44,714 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 233 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:44,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 248 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:22:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-19 04:22:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 167. [2021-11-19 04:22:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4879518072289157) internal successors, (247), 166 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 247 transitions. [2021-11-19 04:22:44,729 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 247 transitions. Word has length 21 [2021-11-19 04:22:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:44,732 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 247 transitions. [2021-11-19 04:22:44,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:44,732 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 247 transitions. [2021-11-19 04:22:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:22:44,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:44,734 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:44,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:44,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 04:22:44,946 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:44,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1195101891, now seen corresponding path program 2 times [2021-11-19 04:22:44,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:44,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023340431] [2021-11-19 04:22:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:44,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:22:45,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:45,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023340431] [2021-11-19 04:22:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023340431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:45,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355727597] [2021-11-19 04:22:45,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:22:45,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:45,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:45,072 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:45,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:22:45,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:22:45,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:45,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:22:45,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:22:45,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:22:45,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355727597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:45,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:45,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2021-11-19 04:22:45,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156460762] [2021-11-19 04:22:45,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:45,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:22:45,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:22:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:22:45,439 INFO L87 Difference]: Start difference. First operand 167 states and 247 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:46,560 INFO L93 Difference]: Finished difference Result 411 states and 641 transitions. [2021-11-19 04:22:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:22:46,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-19 04:22:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:46,564 INFO L225 Difference]: With dead ends: 411 [2021-11-19 04:22:46,564 INFO L226 Difference]: Without dead ends: 357 [2021-11-19 04:22:46,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:22:46,567 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 301 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:46,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 231 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:22:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-19 04:22:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 208. [2021-11-19 04:22:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.4830917874396135) internal successors, (307), 207 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 307 transitions. [2021-11-19 04:22:46,584 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 307 transitions. Word has length 21 [2021-11-19 04:22:46,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:46,585 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 307 transitions. [2021-11-19 04:22:46,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:46,585 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 307 transitions. [2021-11-19 04:22:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 04:22:46,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:46,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:46,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:46,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 04:22:46,805 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:46,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1372519271, now seen corresponding path program 3 times [2021-11-19 04:22:46,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:46,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819562777] [2021-11-19 04:22:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:46,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:22:46,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:46,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819562777] [2021-11-19 04:22:46,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819562777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:46,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161395561] [2021-11-19 04:22:46,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:22:46,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:46,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:46,872 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:46,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:22:46,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:22:46,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:22:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:22:46,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:22:47,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161395561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:47,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:47,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2021-11-19 04:22:47,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915985087] [2021-11-19 04:22:47,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:47,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:22:47,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:22:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:22:47,047 INFO L87 Difference]: Start difference. First operand 208 states and 307 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:47,119 INFO L93 Difference]: Finished difference Result 327 states and 463 transitions. [2021-11-19 04:22:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:22:47,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-19 04:22:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:47,122 INFO L225 Difference]: With dead ends: 327 [2021-11-19 04:22:47,122 INFO L226 Difference]: Without dead ends: 315 [2021-11-19 04:22:47,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:22:47,123 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:47,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 77 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:22:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-19 04:22:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 225. [2021-11-19 04:22:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4553571428571428) internal successors, (326), 224 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 326 transitions. [2021-11-19 04:22:47,140 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 326 transitions. Word has length 22 [2021-11-19 04:22:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:47,140 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 326 transitions. [2021-11-19 04:22:47,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:22:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 326 transitions. [2021-11-19 04:22:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:22:47,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:47,142 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:47,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:47,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 04:22:47,345 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash -677222036, now seen corresponding path program 3 times [2021-11-19 04:22:47,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:47,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451747697] [2021-11-19 04:22:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:47,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:47,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:47,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451747697] [2021-11-19 04:22:47,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451747697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:47,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954013208] [2021-11-19 04:22:47,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:22:47,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:47,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:47,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:47,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:22:47,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 04:22:47,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:47,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 04:22:47,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:47,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:48,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954013208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:48,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:22:48,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2021-11-19 04:22:48,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690975207] [2021-11-19 04:22:48,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:48,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:22:48,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:48,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:22:48,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:22:48,106 INFO L87 Difference]: Start difference. First operand 225 states and 326 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:05,884 INFO L93 Difference]: Finished difference Result 804 states and 1289 transitions. [2021-11-19 04:23:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:23:05,885 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-19 04:23:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:05,888 INFO L225 Difference]: With dead ends: 804 [2021-11-19 04:23:05,889 INFO L226 Difference]: Without dead ends: 755 [2021-11-19 04:23:05,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=811, Invalid=1541, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:23:05,891 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 1050 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:05,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 887 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 04:23:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-19 04:23:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 366. [2021-11-19 04:23:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.4931506849315068) internal successors, (545), 365 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 545 transitions. [2021-11-19 04:23:05,919 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 545 transitions. Word has length 23 [2021-11-19 04:23:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:05,919 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 545 transitions. [2021-11-19 04:23:05,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 545 transitions. [2021-11-19 04:23:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:23:05,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:05,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:05,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-19 04:23:06,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:06,125 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -11866489, now seen corresponding path program 4 times [2021-11-19 04:23:06,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:06,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940689840] [2021-11-19 04:23:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:06,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:23:06,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:06,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940689840] [2021-11-19 04:23:06,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940689840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:23:06,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266156233] [2021-11-19 04:23:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:23:06,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:06,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:06,558 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:23:06,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:23:06,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:23:06,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:23:06,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-19 04:23:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:23:07,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:23:07,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266156233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:23:07,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:23:07,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 10] total 30 [2021-11-19 04:23:07,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716618909] [2021-11-19 04:23:07,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:07,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:23:07,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:07,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:23:07,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:23:07,664 INFO L87 Difference]: Start difference. First operand 366 states and 545 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:09,174 INFO L93 Difference]: Finished difference Result 473 states and 667 transitions. [2021-11-19 04:23:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:23:09,175 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 04:23:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:09,177 INFO L225 Difference]: With dead ends: 473 [2021-11-19 04:23:09,177 INFO L226 Difference]: Without dead ends: 382 [2021-11-19 04:23:09,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 04:23:09,179 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:09,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 69 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:23:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-19 04:23:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 334. [2021-11-19 04:23:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.4684684684684686) internal successors, (489), 333 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 489 transitions. [2021-11-19 04:23:09,204 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 489 transitions. Word has length 24 [2021-11-19 04:23:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:09,204 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 489 transitions. [2021-11-19 04:23:09,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 489 transitions. [2021-11-19 04:23:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 04:23:09,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:09,206 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:09,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:09,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:09,433 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:09,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash -147642777, now seen corresponding path program 4 times [2021-11-19 04:23:09,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:09,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274419091] [2021-11-19 04:23:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:09,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:09,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:09,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274419091] [2021-11-19 04:23:09,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274419091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:23:09,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286996623] [2021-11-19 04:23:09,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:23:09,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:09,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:09,651 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:23:09,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:23:09,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:23:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:23:09,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 04:23:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:23:09,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:23:09,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286996623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:23:09,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:23:09,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2021-11-19 04:23:09,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031684320] [2021-11-19 04:23:09,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:09,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:23:09,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:23:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:23:09,963 INFO L87 Difference]: Start difference. First operand 334 states and 489 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:14,150 INFO L93 Difference]: Finished difference Result 922 states and 1301 transitions. [2021-11-19 04:23:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-19 04:23:14,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-19 04:23:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:14,156 INFO L225 Difference]: With dead ends: 922 [2021-11-19 04:23:14,156 INFO L226 Difference]: Without dead ends: 844 [2021-11-19 04:23:14,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3704 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=926, Invalid=9994, Unknown=0, NotChecked=0, Total=10920 [2021-11-19 04:23:14,161 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 341 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:14,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 328 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:23:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-11-19 04:23:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 386. [2021-11-19 04:23:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.483116883116883) internal successors, (571), 385 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 571 transitions. [2021-11-19 04:23:14,193 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 571 transitions. Word has length 24 [2021-11-19 04:23:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:14,194 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 571 transitions. [2021-11-19 04:23:14,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:23:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 571 transitions. [2021-11-19 04:23:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:23:14,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:14,195 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:14,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:14,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:14,409 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1534066082, now seen corresponding path program 1 times [2021-11-19 04:23:14,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:14,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856951664] [2021-11-19 04:23:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:14,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:23:14,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:14,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856951664] [2021-11-19 04:23:14,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856951664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:23:14,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182846117] [2021-11-19 04:23:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:14,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:14,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:14,650 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:23:14,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:23:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:14,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:23:14,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:23:14,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:23:15,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182846117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:23:15,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:23:15,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-11-19 04:23:15,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948698069] [2021-11-19 04:23:15,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:15,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:23:15,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:23:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:23:15,254 INFO L87 Difference]: Start difference. First operand 386 states and 571 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:09,575 INFO L93 Difference]: Finished difference Result 937 states and 1459 transitions. [2021-11-19 04:24:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-19 04:24:09,576 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-19 04:24:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:09,580 INFO L225 Difference]: With dead ends: 937 [2021-11-19 04:24:09,580 INFO L226 Difference]: Without dead ends: 859 [2021-11-19 04:24:09,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 51.1s TimeCoverageRelationStatistics Valid=1855, Invalid=4151, Unknown=0, NotChecked=0, Total=6006 [2021-11-19 04:24:09,584 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1399 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 2087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:09,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1399 Valid, 847 Invalid, 2087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 04:24:09,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-11-19 04:24:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 400. [2021-11-19 04:24:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.4962406015037595) internal successors, (597), 399 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 597 transitions. [2021-11-19 04:24:09,618 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 597 transitions. Word has length 25 [2021-11-19 04:24:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:09,618 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 597 transitions. [2021-11-19 04:24:09,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 597 transitions. [2021-11-19 04:24:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 04:24:09,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:09,620 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:09,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:09,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:24:09,833 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1999602746, now seen corresponding path program 5 times [2021-11-19 04:24:09,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:09,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904611657] [2021-11-19 04:24:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:09,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 04:24:09,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:09,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904611657] [2021-11-19 04:24:09,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904611657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:09,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881802751] [2021-11-19 04:24:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:24:09,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:09,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:09,961 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:09,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 04:24:10,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-19 04:24:10,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:24:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:24:10,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:24:10,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881802751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:10,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:10,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2021-11-19 04:24:10,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882783176] [2021-11-19 04:24:10,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:10,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:24:10,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:10,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:24:10,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:24:10,241 INFO L87 Difference]: Start difference. First operand 400 states and 597 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:10,441 INFO L93 Difference]: Finished difference Result 678 states and 973 transitions. [2021-11-19 04:24:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:24:10,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-19 04:24:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:10,447 INFO L225 Difference]: With dead ends: 678 [2021-11-19 04:24:10,447 INFO L226 Difference]: Without dead ends: 654 [2021-11-19 04:24:10,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:24:10,449 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 84 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:10,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 192 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:24:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-19 04:24:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 401. [2021-11-19 04:24:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.4875) internal successors, (595), 400 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 595 transitions. [2021-11-19 04:24:10,482 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 595 transitions. Word has length 26 [2021-11-19 04:24:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:10,483 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 595 transitions. [2021-11-19 04:24:10,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 595 transitions. [2021-11-19 04:24:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 04:24:10,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:10,484 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:10,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:10,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 04:24:10,706 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash -833380899, now seen corresponding path program 5 times [2021-11-19 04:24:10,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:10,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281653861] [2021-11-19 04:24:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:10,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:10,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:10,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281653861] [2021-11-19 04:24:10,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281653861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:10,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000932266] [2021-11-19 04:24:10,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:24:10,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:10,917 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:10,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 04:24:11,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 04:24:11,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 04:24:11,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:11,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:24:11,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000932266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:11,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:11,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2021-11-19 04:24:11,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306141054] [2021-11-19 04:24:11,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:11,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:24:11,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:24:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:24:11,678 INFO L87 Difference]: Start difference. First operand 401 states and 595 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:38,147 INFO L93 Difference]: Finished difference Result 1252 states and 1834 transitions. [2021-11-19 04:24:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-11-19 04:24:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-19 04:24:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:38,154 INFO L225 Difference]: With dead ends: 1252 [2021-11-19 04:24:38,154 INFO L226 Difference]: Without dead ends: 1166 [2021-11-19 04:24:38,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17341 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=8385, Invalid=34257, Unknown=0, NotChecked=0, Total=42642 [2021-11-19 04:24:38,165 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 790 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 1018 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1018 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:38,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 520 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1018 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 04:24:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-11-19 04:24:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 502. [2021-11-19 04:24:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.5029940119760479) internal successors, (753), 501 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 753 transitions. [2021-11-19 04:24:38,204 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 753 transitions. Word has length 27 [2021-11-19 04:24:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:38,205 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 753 transitions. [2021-11-19 04:24:38,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 753 transitions. [2021-11-19 04:24:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:24:38,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:38,206 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:38,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:38,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:24:38,415 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:38,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash 796082573, now seen corresponding path program 6 times [2021-11-19 04:24:38,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:38,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746956540] [2021-11-19 04:24:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:38,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 04:24:38,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:38,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746956540] [2021-11-19 04:24:38,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746956540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:38,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586666593] [2021-11-19 04:24:38,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:24:38,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:38,660 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:38,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 04:24:38,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-19 04:24:38,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:38,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:24:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:24:38,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:24:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 04:24:38,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586666593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:24:38,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:24:38,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2021-11-19 04:24:38,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586019159] [2021-11-19 04:24:38,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:24:38,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:24:38,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:24:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:24:38,989 INFO L87 Difference]: Start difference. First operand 502 states and 753 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:45,172 INFO L93 Difference]: Finished difference Result 1145 states and 1631 transitions. [2021-11-19 04:24:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-19 04:24:45,173 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-19 04:24:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:45,177 INFO L225 Difference]: With dead ends: 1145 [2021-11-19 04:24:45,177 INFO L226 Difference]: Without dead ends: 1050 [2021-11-19 04:24:45,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=989, Invalid=8517, Unknown=0, NotChecked=0, Total=9506 [2021-11-19 04:24:45,179 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 407 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:45,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 462 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 04:24:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-11-19 04:24:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 530. [2021-11-19 04:24:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 1.4971644612476371) internal successors, (792), 529 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 792 transitions. [2021-11-19 04:24:45,223 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 792 transitions. Word has length 29 [2021-11-19 04:24:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:45,223 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 792 transitions. [2021-11-19 04:24:45,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:24:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 792 transitions. [2021-11-19 04:24:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:24:45,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:45,225 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:45,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 04:24:45,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:45,454 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:24:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:45,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 6 times [2021-11-19 04:24:45,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:45,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781505737] [2021-11-19 04:24:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:45,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:24:46,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:46,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781505737] [2021-11-19 04:24:46,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781505737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:46,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837612414] [2021-11-19 04:24:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:24:46,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:46,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:46,135 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:46,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 04:24:46,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-19 04:24:46,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:24:46,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-19 04:24:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:12,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:14,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837612414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:14,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:25:14,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 20] total 47 [2021-11-19 04:25:14,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599339184] [2021-11-19 04:25:14,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:14,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 04:25:14,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 04:25:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:25:14,238 INFO L87 Difference]: Start difference. First operand 530 states and 792 transitions. Second operand has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:17,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:25:19,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:25:26,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:25:29,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:25:32,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:25:38,805 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:25:43,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:25:47,940 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:25:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:50,963 INFO L93 Difference]: Finished difference Result 831 states and 1166 transitions. [2021-11-19 04:25:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 04:25:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-19 04:25:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:50,967 INFO L225 Difference]: With dead ends: 831 [2021-11-19 04:25:50,967 INFO L226 Difference]: Without dead ends: 714 [2021-11-19 04:25:50,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=993, Invalid=5487, Unknown=0, NotChecked=0, Total=6480 [2021-11-19 04:25:50,969 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 266 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 260 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:50,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 190 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 905 Invalid, 4 Unknown, 0 Unchecked, 24.3s Time] [2021-11-19 04:25:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-19 04:25:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 543. [2021-11-19 04:25:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 1.4797047970479704) internal successors, (802), 542 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 802 transitions. [2021-11-19 04:25:51,010 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 802 transitions. Word has length 30 [2021-11-19 04:25:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:51,011 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 802 transitions. [2021-11-19 04:25:51,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:25:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 802 transitions. [2021-11-19 04:25:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:25:51,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:51,013 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:51,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-19 04:25:51,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:51,229 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:51,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1893940903, now seen corresponding path program 7 times [2021-11-19 04:25:51,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:51,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795957077] [2021-11-19 04:25:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:51,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:51,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:51,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795957077] [2021-11-19 04:25:51,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795957077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:51,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965566819] [2021-11-19 04:25:51,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:25:51,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:51,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:51,549 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:51,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 04:25:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:51,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:25:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 04:25:51,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 04:25:51,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965566819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:25:51,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:25:51,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2021-11-19 04:25:51,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919415294] [2021-11-19 04:25:51,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:51,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 04:25:51,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 04:25:51,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:25:51,983 INFO L87 Difference]: Start difference. First operand 543 states and 802 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:26:16,658 INFO L93 Difference]: Finished difference Result 1549 states and 2128 transitions. [2021-11-19 04:26:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-11-19 04:26:16,659 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-19 04:26:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:26:16,665 INFO L225 Difference]: With dead ends: 1549 [2021-11-19 04:26:16,665 INFO L226 Difference]: Without dead ends: 1478 [2021-11-19 04:26:16,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23391 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=3138, Invalid=54702, Unknown=0, NotChecked=0, Total=57840 [2021-11-19 04:26:16,673 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 658 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 3335 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 4043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 3335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:26:16,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 591 Invalid, 4043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 3335 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 04:26:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-11-19 04:26:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 599. [2021-11-19 04:26:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.4899665551839465) internal successors, (891), 598 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 891 transitions. [2021-11-19 04:26:16,743 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 891 transitions. Word has length 30 [2021-11-19 04:26:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:26:16,745 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 891 transitions. [2021-11-19 04:26:16,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 891 transitions. [2021-11-19 04:26:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:26:16,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:26:16,747 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:26:16,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:16,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-19 04:26:16,972 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:26:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1610409754, now seen corresponding path program 7 times [2021-11-19 04:26:16,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:16,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662213545] [2021-11-19 04:26:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:16,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:26:17,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:17,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662213545] [2021-11-19 04:26:17,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662213545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:26:17,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002184935] [2021-11-19 04:26:17,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:26:17,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:17,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:17,286 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:17,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 04:26:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 04:26:17,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:26:17,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:26:18,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002184935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:26:18,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:26:18,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-11-19 04:26:18,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301371616] [2021-11-19 04:26:18,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:18,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-19 04:26:18,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:18,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-19 04:26:18,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 04:26:18,093 INFO L87 Difference]: Start difference. First operand 599 states and 891 transitions. Second operand has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:26:34,114 WARN L227 SmtUtils]: Spent 8.63s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:26:54,481 WARN L227 SmtUtils]: Spent 6.65s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:27:13,078 WARN L227 SmtUtils]: Spent 7.01s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:27:56,987 WARN L227 SmtUtils]: Spent 6.71s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:28:31,457 WARN L227 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:30:19,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:22,052 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:37,646 INFO L93 Difference]: Finished difference Result 1661 states and 2649 transitions. [2021-11-19 04:30:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-19 04:30:37,647 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-19 04:30:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:37,654 INFO L225 Difference]: With dead ends: 1661 [2021-11-19 04:30:37,654 INFO L226 Difference]: Without dead ends: 1466 [2021-11-19 04:30:37,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9040 ImplicationChecksByTransitivity, 236.5s TimeCoverageRelationStatistics Valid=6277, Invalid=17284, Unknown=1, NotChecked=0, Total=23562 [2021-11-19 04:30:37,657 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1483 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 1669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 3524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1669 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:37,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1483 Valid, 1153 Invalid, 3524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1669 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time] [2021-11-19 04:30:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-11-19 04:30:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 656. [2021-11-19 04:30:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 1.483969465648855) internal successors, (972), 655 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 972 transitions. [2021-11-19 04:30:37,720 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 972 transitions. Word has length 30 [2021-11-19 04:30:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:37,721 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 972 transitions. [2021-11-19 04:30:37,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 972 transitions. [2021-11-19 04:30:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:30:37,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:37,723 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:37,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 04:30:37,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:37,940 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:37,940 INFO L85 PathProgramCache]: Analyzing trace with hash 380203431, now seen corresponding path program 8 times [2021-11-19 04:30:37,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:37,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966433694] [2021-11-19 04:30:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:37,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 04:30:38,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:38,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966433694] [2021-11-19 04:30:38,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966433694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:30:38,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559136615] [2021-11-19 04:30:38,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:30:38,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:38,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:38,204 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:38,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 04:30:38,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:30:38,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:30:38,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:30:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 04:30:38,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:30:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 04:30:38,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559136615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:30:38,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:30:38,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2021-11-19 04:30:38,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848502662] [2021-11-19 04:30:38,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:30:38,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:30:38,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:30:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:30:38,612 INFO L87 Difference]: Start difference. First operand 656 states and 972 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:40,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:30:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:40,798 INFO L93 Difference]: Finished difference Result 1166 states and 1647 transitions. [2021-11-19 04:30:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:30:40,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 04:30:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:40,804 INFO L225 Difference]: With dead ends: 1166 [2021-11-19 04:30:40,804 INFO L226 Difference]: Without dead ends: 1129 [2021-11-19 04:30:40,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:30:40,806 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 170 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:40,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 215 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:30:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-11-19 04:30:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 662. [2021-11-19 04:30:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.4780635400907716) internal successors, (977), 661 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 977 transitions. [2021-11-19 04:30:40,867 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 977 transitions. Word has length 32 [2021-11-19 04:30:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:40,868 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 977 transitions. [2021-11-19 04:30:40,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 977 transitions. [2021-11-19 04:30:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 04:30:40,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:40,870 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:40,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 04:30:41,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:41,086 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash -404867559, now seen corresponding path program 3 times [2021-11-19 04:30:41,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:41,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862689751] [2021-11-19 04:30:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:41,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 04:30:41,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:41,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862689751] [2021-11-19 04:30:41,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862689751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:30:41,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393460623] [2021-11-19 04:30:41,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:30:41,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:41,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:41,322 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:41,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 04:30:41,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 04:30:41,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:30:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:30:41,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:30:41,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:30:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 04:30:41,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393460623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:30:41,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:30:41,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 22 [2021-11-19 04:30:41,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651355978] [2021-11-19 04:30:41,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:30:41,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 04:30:41,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 04:30:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:30:41,823 INFO L87 Difference]: Start difference. First operand 662 states and 977 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:44,535 INFO L93 Difference]: Finished difference Result 929 states and 1338 transitions. [2021-11-19 04:30:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-19 04:30:44,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-19 04:30:44,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:44,539 INFO L225 Difference]: With dead ends: 929 [2021-11-19 04:30:44,540 INFO L226 Difference]: Without dead ends: 749 [2021-11-19 04:30:44,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=451, Invalid=4519, Unknown=0, NotChecked=0, Total=4970 [2021-11-19 04:30:44,541 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 132 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:44,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 474 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:30:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-19 04:30:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 622. [2021-11-19 04:30:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 1.4573268921095008) internal successors, (905), 621 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 905 transitions. [2021-11-19 04:30:44,579 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 905 transitions. Word has length 32 [2021-11-19 04:30:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:44,580 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 905 transitions. [2021-11-19 04:30:44,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:44,580 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 905 transitions. [2021-11-19 04:30:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 04:30:44,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:44,581 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:44,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 04:30:44,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 04:30:44,782 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:44,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1396440605, now seen corresponding path program 8 times [2021-11-19 04:30:44,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:44,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710752429] [2021-11-19 04:30:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:44,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:45,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:45,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710752429] [2021-11-19 04:30:45,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710752429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:30:45,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634352584] [2021-11-19 04:30:45,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:30:45,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:45,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:45,178 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:45,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 04:30:45,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:30:45,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:30:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 04:30:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:30:45,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:30:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 04:30:45,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634352584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:30:45,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:30:45,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2021-11-19 04:30:45,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253322909] [2021-11-19 04:30:45,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:30:45,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:30:45,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:30:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:30:45,721 INFO L87 Difference]: Start difference. First operand 622 states and 905 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:31:56,361 INFO L93 Difference]: Finished difference Result 2076 states and 2757 transitions. [2021-11-19 04:31:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-11-19 04:31:56,362 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-19 04:31:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:31:56,371 INFO L225 Difference]: With dead ends: 2076 [2021-11-19 04:31:56,371 INFO L226 Difference]: Without dead ends: 1985 [2021-11-19 04:31:56,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49786 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=5237, Invalid=112069, Unknown=0, NotChecked=0, Total=117306 [2021-11-19 04:31:56,403 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 934 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 5122 mSolverCounterSat, 1211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 6333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1211 IncrementalHoareTripleChecker+Valid, 5122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:31:56,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 848 Invalid, 6333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1211 Valid, 5122 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-11-19 04:31:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-11-19 04:31:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 719. [2021-11-19 04:31:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.4554317548746518) internal successors, (1045), 718 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1045 transitions. [2021-11-19 04:31:56,476 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1045 transitions. Word has length 33 [2021-11-19 04:31:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:31:56,477 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1045 transitions. [2021-11-19 04:31:56,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1045 transitions. [2021-11-19 04:31:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:31:56,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:31:56,480 INFO L514 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:31:56,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 04:31:56,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-19 04:31:56,693 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:31:56,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:31:56,694 INFO L85 PathProgramCache]: Analyzing trace with hash -2101731714, now seen corresponding path program 9 times [2021-11-19 04:31:56,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:31:56,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849081026] [2021-11-19 04:31:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:31:56,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:31:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:31:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:31:57,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:31:57,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849081026] [2021-11-19 04:31:57,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849081026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:31:57,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367089234] [2021-11-19 04:31:57,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:31:57,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:31:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:31:57,081 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:31:57,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 04:31:57,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:31:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:31:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:31:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:31:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 04:31:57,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:31:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 04:31:57,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367089234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:31:57,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:31:57,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7, 8] total 29 [2021-11-19 04:31:57,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720458000] [2021-11-19 04:31:57,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:31:57,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:31:57,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:31:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:31:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:31:57,571 INFO L87 Difference]: Start difference. First operand 719 states and 1045 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:32:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:04,660 INFO L93 Difference]: Finished difference Result 1308 states and 1897 transitions. [2021-11-19 04:32:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-11-19 04:32:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-19 04:32:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:04,666 INFO L225 Difference]: With dead ends: 1308 [2021-11-19 04:32:04,666 INFO L226 Difference]: Without dead ends: 1134 [2021-11-19 04:32:04,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7147 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1652, Invalid=20400, Unknown=0, NotChecked=0, Total=22052 [2021-11-19 04:32:04,669 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 170 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 3861 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 4381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 3861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:04,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 981 Invalid, 4381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 3861 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 04:32:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-11-19 04:32:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 831. [2021-11-19 04:32:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 1.4240963855421687) internal successors, (1182), 830 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:32:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1182 transitions. [2021-11-19 04:32:04,719 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1182 transitions. Word has length 35 [2021-11-19 04:32:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:04,720 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1182 transitions. [2021-11-19 04:32:04,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:32:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1182 transitions. [2021-11-19 04:32:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:32:04,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:04,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:04,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-19 04:32:04,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 04:32:04,937 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:32:04,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 10 times [2021-11-19 04:32:04,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:04,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494173354] [2021-11-19 04:32:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:04,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:32:05,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:05,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494173354] [2021-11-19 04:32:05,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494173354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:32:05,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956791902] [2021-11-19 04:32:05,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:32:05,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:05,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:05,784 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:32:05,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 04:32:06,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:32:06,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:32:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:32:06,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:32:06,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:32:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:32:07,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956791902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:32:07,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:32:07,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2021-11-19 04:32:07,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808953809] [2021-11-19 04:32:07,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:32:07,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 04:32:07,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 04:32:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 04:32:07,678 INFO L87 Difference]: Start difference. First operand 831 states and 1182 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:32:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:15,068 INFO L93 Difference]: Finished difference Result 1079 states and 1450 transitions. [2021-11-19 04:32:15,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 04:32:15,069 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-19 04:32:15,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:15,073 INFO L225 Difference]: With dead ends: 1079 [2021-11-19 04:32:15,074 INFO L226 Difference]: Without dead ends: 1065 [2021-11-19 04:32:15,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=555, Invalid=4557, Unknown=0, NotChecked=0, Total=5112 [2021-11-19 04:32:15,075 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 115 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:15,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 276 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 04:32:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-11-19 04:32:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 852. [2021-11-19 04:32:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 1.4171562867215042) internal successors, (1206), 851 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:32:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1206 transitions. [2021-11-19 04:32:15,128 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1206 transitions. Word has length 36 [2021-11-19 04:32:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:15,129 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 1206 transitions. [2021-11-19 04:32:15,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:32:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1206 transitions. [2021-11-19 04:32:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:32:15,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:15,131 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:15,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-19 04:32:15,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 04:32:15,338 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:32:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash 231042247, now seen corresponding path program 4 times [2021-11-19 04:32:15,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:15,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899090536] [2021-11-19 04:32:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:15,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:32:15,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:15,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899090536] [2021-11-19 04:32:15,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899090536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:32:15,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11646680] [2021-11-19 04:32:15,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:32:15,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:15,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:15,681 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:32:15,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 04:32:15,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:32:15,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:32:15,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 04:32:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 04:32:16,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:32:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 04:32:16,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11646680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:32:16,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:32:16,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2021-11-19 04:32:16,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853094453] [2021-11-19 04:32:16,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:32:16,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:32:16,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:32:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:32:16,192 INFO L87 Difference]: Start difference. First operand 852 states and 1206 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:32:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:32,446 INFO L93 Difference]: Finished difference Result 1726 states and 2347 transitions. [2021-11-19 04:32:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-19 04:32:32,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-19 04:32:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:32,453 INFO L225 Difference]: With dead ends: 1726 [2021-11-19 04:32:32,453 INFO L226 Difference]: Without dead ends: 1628 [2021-11-19 04:32:32,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6483 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1581, Invalid=17601, Unknown=0, NotChecked=0, Total=19182 [2021-11-19 04:32:32,455 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 538 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 2603 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 2603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:32,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 831 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 2603 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 04:32:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-11-19 04:32:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 801. [2021-11-19 04:32:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.4225) internal successors, (1138), 800 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:32:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1138 transitions. [2021-11-19 04:32:32,509 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1138 transitions. Word has length 36 [2021-11-19 04:32:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:32,510 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1138 transitions. [2021-11-19 04:32:32,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:32:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1138 transitions. [2021-11-19 04:32:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:32:32,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:32,511 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:32,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 04:32:32,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-19 04:32:32,712 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:32:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash 61818599, now seen corresponding path program 9 times [2021-11-19 04:32:32,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:32,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776012791] [2021-11-19 04:32:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:32,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:32:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:33,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:33,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776012791] [2021-11-19 04:32:33,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776012791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:32:33,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226116562] [2021-11-19 04:32:33,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:32:33,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:33,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:33,151 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:32:33,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9084314b-7b25-4463-8dee-60c023eac36b/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-19 04:32:33,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:32:33,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:32:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-19 04:32:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:33,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:32:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:34,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226116562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:32:34,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:32:34,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 39 [2021-11-19 04:32:34,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665289931] [2021-11-19 04:32:34,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:32:34,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-19 04:32:34,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:34,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-19 04:32:34,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 04:32:34,387 INFO L87 Difference]: Start difference. First operand 801 states and 1138 transitions. Second operand has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:33:01,625 WARN L227 SmtUtils]: Spent 20.35s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:33:21,067 WARN L227 SmtUtils]: Spent 13.19s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:33:31,552 WARN L227 SmtUtils]: Spent 7.69s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:33:45,208 WARN L227 SmtUtils]: Spent 10.12s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:34:35,595 WARN L227 SmtUtils]: Spent 7.56s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:34:40,478 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 04:34:47,491 WARN L227 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:35:04,832 WARN L227 SmtUtils]: Spent 5.59s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)