./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF --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 1a498dbc067f1de398639e507498752ad05d79db17a274a9c2dbfecc9e6d20a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:54:30,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:54:30,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:54:30,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:54:30,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:54:30,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:54:30,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:54:30,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:54:30,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:54:30,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:54:30,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:54:30,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:54:30,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:54:30,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:54:30,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:54:30,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:54:30,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:54:30,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:54:30,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:54:30,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:54:30,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:54:30,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:54:30,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:54:30,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:54:30,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:54:30,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:54:30,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:54:30,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:54:30,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:54:30,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:54:30,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:54:30,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:54:30,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:54:30,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:54:30,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:54:30,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:54:30,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:54:30,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:54:30,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:54:30,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:54:30,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:54:30,674 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:54:30,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:54:30,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:54:30,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:54:30,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:54:30,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:54:30,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:54:30,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:54:30,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:54:30,727 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:54:30,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:54:30,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:54:30,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:54:30,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:54:30,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:54:30,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:54:30,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:54:30,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:54:30,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:54:30,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:54:30,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:54:30,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:54:30,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:54:30,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:54:30,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:54:30,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:54:30,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:54:30,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:54:30,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:54:30,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:54:30,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:54:30,734 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:54:30,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:54:30,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:54:30,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:54:30,735 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_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a498dbc067f1de398639e507498752ad05d79db17a274a9c2dbfecc9e6d20a0 [2021-11-20 06:54:31,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:54:31,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:54:31,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:54:31,044 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:54:31,044 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:54:31,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem11_label25.c [2021-11-20 06:54:31,116 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/data/10fb93849/bc38ddccb34641918eca87b7ddb9fa7f/FLAG3d8cf67e8 [2021-11-20 06:54:31,719 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:54:31,720 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/sv-benchmarks/c/eca-rers2012/Problem11_label25.c [2021-11-20 06:54:31,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/data/10fb93849/bc38ddccb34641918eca87b7ddb9fa7f/FLAG3d8cf67e8 [2021-11-20 06:54:31,958 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/data/10fb93849/bc38ddccb34641918eca87b7ddb9fa7f [2021-11-20 06:54:31,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:54:31,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:54:31,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:54:31,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:54:31,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:54:31,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:31" (1/1) ... [2021-11-20 06:54:31,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70778005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:31, skipping insertion in model container [2021-11-20 06:54:31,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:54:31" (1/1) ... [2021-11-20 06:54:31,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:54:32,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:54:32,377 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_ca2b2563-0954-4eb3-8041-208becd234d0/sv-benchmarks/c/eca-rers2012/Problem11_label25.c[4556,4569] [2021-11-20 06:54:32,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:54:32,710 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:54:32,732 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_ca2b2563-0954-4eb3-8041-208becd234d0/sv-benchmarks/c/eca-rers2012/Problem11_label25.c[4556,4569] [2021-11-20 06:54:32,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:54:32,905 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:54:32,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32 WrapperNode [2021-11-20 06:54:32,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:54:32,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:54:32,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:54:32,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:54:32,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:32,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:33,089 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-11-20 06:54:33,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:54:33,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:54:33,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:54:33,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:54:33,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:33,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:33,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:33,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:33,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:33,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:33,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:33,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:54:33,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:54:33,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:54:33,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:54:33,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (1/1) ... [2021-11-20 06:54:33,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:54:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:33,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:54:33,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:54:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:54:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:54:33,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:54:33,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:54:33,412 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:54:33,414 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:54:34,982 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:54:34,993 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:54:34,993 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:54:34,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:34 BoogieIcfgContainer [2021-11-20 06:54:34,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:54:34,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:54:34,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:54:35,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:54:35,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:54:31" (1/3) ... [2021-11-20 06:54:35,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642f602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:35, skipping insertion in model container [2021-11-20 06:54:35,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:54:32" (2/3) ... [2021-11-20 06:54:35,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642f602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:54:35, skipping insertion in model container [2021-11-20 06:54:35,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:54:34" (3/3) ... [2021-11-20 06:54:35,004 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label25.c [2021-11-20 06:54:35,009 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:54:35,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:54:35,059 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:54:35,066 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 [2021-11-20 06:54:35,066 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:54:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:54:35,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:35,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:35,099 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:35,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2021-11-20 06:54:35,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:35,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758399090] [2021-11-20 06:54:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:35,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:35,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:35,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758399090] [2021-11-20 06:54:35,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758399090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:35,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:35,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:35,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098689512] [2021-11-20 06:54:35,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:35,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:35,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:35,476 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:36,783 INFO L93 Difference]: Finished difference Result 761 states and 1345 transitions. [2021-11-20 06:54:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:36,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-20 06:54:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:36,809 INFO L225 Difference]: With dead ends: 761 [2021-11-20 06:54:36,810 INFO L226 Difference]: Without dead ends: 413 [2021-11-20 06:54:36,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:36,822 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 197 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:36,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 222 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:54:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-20 06:54:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2021-11-20 06:54:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.453883495145631) internal successors, (599), 412 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 599 transitions. [2021-11-20 06:54:36,889 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 599 transitions. Word has length 31 [2021-11-20 06:54:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:36,889 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 599 transitions. [2021-11-20 06:54:36,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 599 transitions. [2021-11-20 06:54:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:54:36,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:36,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:36,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:54:36,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 511429272, now seen corresponding path program 1 times [2021-11-20 06:54:36,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:36,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810910367] [2021-11-20 06:54:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:36,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:37,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:37,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810910367] [2021-11-20 06:54:37,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810910367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:37,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:37,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:37,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312886524] [2021-11-20 06:54:37,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:37,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:37,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:37,137 INFO L87 Difference]: Start difference. First operand 413 states and 599 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:38,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:38,046 INFO L93 Difference]: Finished difference Result 1211 states and 1763 transitions. [2021-11-20 06:54:38,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:38,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-20 06:54:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:38,052 INFO L225 Difference]: With dead ends: 1211 [2021-11-20 06:54:38,052 INFO L226 Difference]: Without dead ends: 800 [2021-11-20 06:54:38,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:38,055 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 144 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:38,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 118 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:54:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-11-20 06:54:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 789. [2021-11-20 06:54:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 1.3756345177664975) internal successors, (1084), 788 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1084 transitions. [2021-11-20 06:54:38,094 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1084 transitions. Word has length 99 [2021-11-20 06:54:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:38,095 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1084 transitions. [2021-11-20 06:54:38,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1084 transitions. [2021-11-20 06:54:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:54:38,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:38,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:38,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:54:38,100 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2046842248, now seen corresponding path program 1 times [2021-11-20 06:54:38,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:38,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733070860] [2021-11-20 06:54:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:38,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:38,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:38,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733070860] [2021-11-20 06:54:38,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733070860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:38,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:38,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:38,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806574952] [2021-11-20 06:54:38,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:38,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:38,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:38,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:38,246 INFO L87 Difference]: Start difference. First operand 789 states and 1084 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:39,060 INFO L93 Difference]: Finished difference Result 1945 states and 2614 transitions. [2021-11-20 06:54:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-20 06:54:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:39,069 INFO L225 Difference]: With dead ends: 1945 [2021-11-20 06:54:39,069 INFO L226 Difference]: Without dead ends: 1158 [2021-11-20 06:54:39,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:39,072 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:39,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 190 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:54:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-11-20 06:54:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1157. [2021-11-20 06:54:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 1.2716262975778547) internal successors, (1470), 1156 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1470 transitions. [2021-11-20 06:54:39,106 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1470 transitions. Word has length 100 [2021-11-20 06:54:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:39,106 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1470 transitions. [2021-11-20 06:54:39,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:39,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1470 transitions. [2021-11-20 06:54:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-20 06:54:39,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:39,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:39,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:54:39,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:39,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1827645373, now seen corresponding path program 1 times [2021-11-20 06:54:39,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:39,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510349210] [2021-11-20 06:54:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:39,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:39,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:39,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510349210] [2021-11-20 06:54:39,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510349210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:39,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:39,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:39,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075455181] [2021-11-20 06:54:39,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:39,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:39,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:39,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:39,319 INFO L87 Difference]: Start difference. First operand 1157 states and 1470 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:40,739 INFO L93 Difference]: Finished difference Result 3445 states and 4568 transitions. [2021-11-20 06:54:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:40,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-11-20 06:54:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:40,756 INFO L225 Difference]: With dead ends: 3445 [2021-11-20 06:54:40,756 INFO L226 Difference]: Without dead ends: 2474 [2021-11-20 06:54:40,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:40,781 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 333 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:40,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 95 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:54:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-11-20 06:54:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2473. [2021-11-20 06:54:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 1.287621359223301) internal successors, (3183), 2472 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3183 transitions. [2021-11-20 06:54:40,850 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3183 transitions. Word has length 158 [2021-11-20 06:54:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:40,851 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 3183 transitions. [2021-11-20 06:54:40,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3183 transitions. [2021-11-20 06:54:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-20 06:54:40,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:40,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:40,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:54:40,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:40,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1853380539, now seen corresponding path program 1 times [2021-11-20 06:54:40,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:40,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441547500] [2021-11-20 06:54:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:40,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:40,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:40,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441547500] [2021-11-20 06:54:40,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441547500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:40,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:40,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:40,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790664632] [2021-11-20 06:54:40,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:40,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:40,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:40,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:40,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:40,992 INFO L87 Difference]: Start difference. First operand 2473 states and 3183 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 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) [2021-11-20 06:54:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:41,870 INFO L93 Difference]: Finished difference Result 5695 states and 7520 transitions. [2021-11-20 06:54:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:41,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 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) Word has length 211 [2021-11-20 06:54:41,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:41,891 INFO L225 Difference]: With dead ends: 5695 [2021-11-20 06:54:41,891 INFO L226 Difference]: Without dead ends: 3592 [2021-11-20 06:54:41,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:41,900 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 136 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:41,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 347 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:54:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-11-20 06:54:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3579. [2021-11-20 06:54:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3579 states, 3578 states have (on average 1.252375628842929) internal successors, (4481), 3578 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 4481 transitions. [2021-11-20 06:54:42,020 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 4481 transitions. Word has length 211 [2021-11-20 06:54:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:42,021 INFO L470 AbstractCegarLoop]: Abstraction has 3579 states and 4481 transitions. [2021-11-20 06:54:42,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 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) [2021-11-20 06:54:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 4481 transitions. [2021-11-20 06:54:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-20 06:54:42,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:42,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:42,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:54:42,034 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash 898941365, now seen corresponding path program 1 times [2021-11-20 06:54:42,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:42,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256165102] [2021-11-20 06:54:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:42,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 06:54:42,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256165102] [2021-11-20 06:54:42,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256165102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:42,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:42,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:42,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587221946] [2021-11-20 06:54:42,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:42,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:42,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:42,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:42,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:42,193 INFO L87 Difference]: Start difference. First operand 3579 states and 4481 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:43,011 INFO L93 Difference]: Finished difference Result 7726 states and 9781 transitions. [2021-11-20 06:54:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:43,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 212 [2021-11-20 06:54:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:43,036 INFO L225 Difference]: With dead ends: 7726 [2021-11-20 06:54:43,036 INFO L226 Difference]: Without dead ends: 4517 [2021-11-20 06:54:43,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:43,041 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 171 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:43,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 346 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:54:43,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-11-20 06:54:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4499. [2021-11-20 06:54:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 1.240773677189862) internal successors, (5581), 4498 states have internal predecessors, (5581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 5581 transitions. [2021-11-20 06:54:43,204 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 5581 transitions. Word has length 212 [2021-11-20 06:54:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:43,205 INFO L470 AbstractCegarLoop]: Abstraction has 4499 states and 5581 transitions. [2021-11-20 06:54:43,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 5581 transitions. [2021-11-20 06:54:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-20 06:54:43,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:43,210 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:43,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:54:43,210 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:43,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:43,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1164869568, now seen corresponding path program 1 times [2021-11-20 06:54:43,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:43,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17680847] [2021-11-20 06:54:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:43,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-20 06:54:43,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:43,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17680847] [2021-11-20 06:54:43,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17680847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:43,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:43,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:43,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277754469] [2021-11-20 06:54:43,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:43,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:43,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:43,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:43,348 INFO L87 Difference]: Start difference. First operand 4499 states and 5581 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:44,263 INFO L93 Difference]: Finished difference Result 9741 states and 12305 transitions. [2021-11-20 06:54:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 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 213 [2021-11-20 06:54:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:44,297 INFO L225 Difference]: With dead ends: 9741 [2021-11-20 06:54:44,297 INFO L226 Difference]: Without dead ends: 5612 [2021-11-20 06:54:44,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:44,305 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 166 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:44,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 371 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:54:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5612 states. [2021-11-20 06:54:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5612 to 5419. [2021-11-20 06:54:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 1.2331118493909192) internal successors, (6681), 5418 states have internal predecessors, (6681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 6681 transitions. [2021-11-20 06:54:44,486 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 6681 transitions. Word has length 213 [2021-11-20 06:54:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:44,487 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 6681 transitions. [2021-11-20 06:54:44,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 6681 transitions. [2021-11-20 06:54:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-20 06:54:44,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:44,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:44,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:54:44,492 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash 479506802, now seen corresponding path program 1 times [2021-11-20 06:54:44,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:44,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218882168] [2021-11-20 06:54:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:44,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:44,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:44,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218882168] [2021-11-20 06:54:44,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218882168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:44,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:44,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:44,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318572510] [2021-11-20 06:54:44,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:44,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:44,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:44,685 INFO L87 Difference]: Start difference. First operand 5419 states and 6681 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:46,200 INFO L93 Difference]: Finished difference Result 16399 states and 20713 transitions. [2021-11-20 06:54:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:46,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-11-20 06:54:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:46,274 INFO L225 Difference]: With dead ends: 16399 [2021-11-20 06:54:46,274 INFO L226 Difference]: Without dead ends: 11350 [2021-11-20 06:54:46,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:46,284 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 306 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:46,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 194 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:54:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11350 states. [2021-11-20 06:54:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11350 to 11344. [2021-11-20 06:54:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11344 states, 11343 states have (on average 1.2060301507537687) internal successors, (13680), 11343 states have internal predecessors, (13680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11344 states to 11344 states and 13680 transitions. [2021-11-20 06:54:46,556 INFO L78 Accepts]: Start accepts. Automaton has 11344 states and 13680 transitions. Word has length 233 [2021-11-20 06:54:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:46,559 INFO L470 AbstractCegarLoop]: Abstraction has 11344 states and 13680 transitions. [2021-11-20 06:54:46,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 11344 states and 13680 transitions. [2021-11-20 06:54:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-20 06:54:46,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:46,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:46,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:54:46,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash 483937782, now seen corresponding path program 1 times [2021-11-20 06:54:46,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:46,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102397885] [2021-11-20 06:54:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:46,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:54:46,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:46,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102397885] [2021-11-20 06:54:46,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102397885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:46,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:46,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:54:46,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164041704] [2021-11-20 06:54:46,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:46,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:46,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:46,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:46,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:46,712 INFO L87 Difference]: Start difference. First operand 11344 states and 13680 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:47,548 INFO L93 Difference]: Finished difference Result 25075 states and 30489 transitions. [2021-11-20 06:54:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:47,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 234 [2021-11-20 06:54:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:47,576 INFO L225 Difference]: With dead ends: 25075 [2021-11-20 06:54:47,576 INFO L226 Difference]: Without dead ends: 14101 [2021-11-20 06:54:47,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:47,593 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 115 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:47,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 153 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:54:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14101 states. [2021-11-20 06:54:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14101 to 13547. [2021-11-20 06:54:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13547 states, 13546 states have (on average 1.1601210689502437) internal successors, (15715), 13546 states have internal predecessors, (15715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13547 states to 13547 states and 15715 transitions. [2021-11-20 06:54:47,894 INFO L78 Accepts]: Start accepts. Automaton has 13547 states and 15715 transitions. Word has length 234 [2021-11-20 06:54:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:47,894 INFO L470 AbstractCegarLoop]: Abstraction has 13547 states and 15715 transitions. [2021-11-20 06:54:47,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 13547 states and 15715 transitions. [2021-11-20 06:54:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-20 06:54:47,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:47,900 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:47,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:54:47,901 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:47,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash -554811765, now seen corresponding path program 1 times [2021-11-20 06:54:47,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:47,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049081645] [2021-11-20 06:54:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:47,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:48,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:48,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049081645] [2021-11-20 06:54:48,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049081645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:48,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:48,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:48,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919351431] [2021-11-20 06:54:48,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:48,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:48,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:48,057 INFO L87 Difference]: Start difference. First operand 13547 states and 15715 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:49,654 INFO L93 Difference]: Finished difference Result 32623 states and 38078 transitions. [2021-11-20 06:54:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 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 243 [2021-11-20 06:54:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:49,689 INFO L225 Difference]: With dead ends: 32623 [2021-11-20 06:54:49,690 INFO L226 Difference]: Without dead ends: 19446 [2021-11-20 06:54:49,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:49,705 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 320 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:49,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 107 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:54:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19446 states. [2021-11-20 06:54:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19446 to 17962. [2021-11-20 06:54:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17962 states, 17961 states have (on average 1.158120371916931) internal successors, (20801), 17961 states have internal predecessors, (20801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17962 states to 17962 states and 20801 transitions. [2021-11-20 06:54:50,176 INFO L78 Accepts]: Start accepts. Automaton has 17962 states and 20801 transitions. Word has length 243 [2021-11-20 06:54:50,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:50,177 INFO L470 AbstractCegarLoop]: Abstraction has 17962 states and 20801 transitions. [2021-11-20 06:54:50,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 17962 states and 20801 transitions. [2021-11-20 06:54:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-20 06:54:50,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:50,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:50,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:54:50,186 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1688647778, now seen corresponding path program 1 times [2021-11-20 06:54:50,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:50,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281303726] [2021-11-20 06:54:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:50,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-20 06:54:50,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:50,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281303726] [2021-11-20 06:54:50,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281303726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:50,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:50,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:50,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045577039] [2021-11-20 06:54:50,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:50,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:50,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:50,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:50,336 INFO L87 Difference]: Start difference. First operand 17962 states and 20801 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:51,380 INFO L93 Difference]: Finished difference Result 35185 states and 40785 transitions. [2021-11-20 06:54:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:51,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 250 [2021-11-20 06:54:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:51,413 INFO L225 Difference]: With dead ends: 35185 [2021-11-20 06:54:51,413 INFO L226 Difference]: Without dead ends: 17409 [2021-11-20 06:54:51,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:51,433 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 170 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:51,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 378 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:54:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17409 states. [2021-11-20 06:54:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17409 to 17217. [2021-11-20 06:54:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17217 states, 17216 states have (on average 1.1367913568773234) internal successors, (19571), 17216 states have internal predecessors, (19571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17217 states to 17217 states and 19571 transitions. [2021-11-20 06:54:51,750 INFO L78 Accepts]: Start accepts. Automaton has 17217 states and 19571 transitions. Word has length 250 [2021-11-20 06:54:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:51,751 INFO L470 AbstractCegarLoop]: Abstraction has 17217 states and 19571 transitions. [2021-11-20 06:54:51,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:51,751 INFO L276 IsEmpty]: Start isEmpty. Operand 17217 states and 19571 transitions. [2021-11-20 06:54:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-20 06:54:51,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:51,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:51,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:54:51,759 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1152681977, now seen corresponding path program 1 times [2021-11-20 06:54:51,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:51,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12837659] [2021-11-20 06:54:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:51,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 113 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:51,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12837659] [2021-11-20 06:54:51,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12837659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20738905] [2021-11-20 06:54:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:51,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:51,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:51,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:52,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:54:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:54:52,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:53,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:53,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20738905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:53,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:53,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-20 06:54:53,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665918203] [2021-11-20 06:54:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:53,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:53,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:53,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:54:53,216 INFO L87 Difference]: Start difference. First operand 17217 states and 19571 transitions. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:54,580 INFO L93 Difference]: Finished difference Result 32042 states and 36493 transitions. [2021-11-20 06:54:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:54,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-11-20 06:54:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:54,611 INFO L225 Difference]: With dead ends: 32042 [2021-11-20 06:54:54,611 INFO L226 Difference]: Without dead ends: 17223 [2021-11-20 06:54:54,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:54:54,627 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 167 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:54,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 179 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:54:54,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17223 states. [2021-11-20 06:54:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17223 to 17217. [2021-11-20 06:54:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17217 states, 17216 states have (on average 1.1353973048327137) internal successors, (19547), 17216 states have internal predecessors, (19547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17217 states to 17217 states and 19547 transitions. [2021-11-20 06:54:54,918 INFO L78 Accepts]: Start accepts. Automaton has 17217 states and 19547 transitions. Word has length 264 [2021-11-20 06:54:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:54,918 INFO L470 AbstractCegarLoop]: Abstraction has 17217 states and 19547 transitions. [2021-11-20 06:54:54,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 17217 states and 19547 transitions. [2021-11-20 06:54:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-20 06:54:54,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:54,932 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:55,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:54:55,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:55,211 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:55,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:55,212 INFO L85 PathProgramCache]: Analyzing trace with hash -800517391, now seen corresponding path program 1 times [2021-11-20 06:54:55,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:55,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307202799] [2021-11-20 06:54:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:55,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-20 06:54:55,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:55,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307202799] [2021-11-20 06:54:55,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307202799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:55,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:55,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:55,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858286679] [2021-11-20 06:54:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:55,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:55,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:55,347 INFO L87 Difference]: Start difference. First operand 17217 states and 19547 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:56,190 INFO L93 Difference]: Finished difference Result 35899 states and 40779 transitions. [2021-11-20 06:54:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:56,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 298 [2021-11-20 06:54:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:56,224 INFO L225 Difference]: With dead ends: 35899 [2021-11-20 06:54:56,224 INFO L226 Difference]: Without dead ends: 21080 [2021-11-20 06:54:56,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:56,235 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 191 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:56,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 151 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:54:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21080 states. [2021-11-20 06:54:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21080 to 18136. [2021-11-20 06:54:56,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18136 states, 18135 states have (on average 1.1355390129583678) internal successors, (20593), 18135 states have internal predecessors, (20593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18136 states to 18136 states and 20593 transitions. [2021-11-20 06:54:56,668 INFO L78 Accepts]: Start accepts. Automaton has 18136 states and 20593 transitions. Word has length 298 [2021-11-20 06:54:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:56,671 INFO L470 AbstractCegarLoop]: Abstraction has 18136 states and 20593 transitions. [2021-11-20 06:54:56,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 18136 states and 20593 transitions. [2021-11-20 06:54:56,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-20 06:54:56,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:56,683 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:56,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:54:56,684 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1136282861, now seen corresponding path program 1 times [2021-11-20 06:54:56,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:56,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816345159] [2021-11-20 06:54:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:56,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 06:54:56,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:56,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816345159] [2021-11-20 06:54:56,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816345159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:56,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:56,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:56,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934203072] [2021-11-20 06:54:56,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:56,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:56,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:56,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:56,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:56,850 INFO L87 Difference]: Start difference. First operand 18136 states and 20593 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:58,344 INFO L93 Difference]: Finished difference Result 41457 states and 47289 transitions. [2021-11-20 06:54:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2021-11-20 06:54:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:58,387 INFO L225 Difference]: With dead ends: 41457 [2021-11-20 06:54:58,388 INFO L226 Difference]: Without dead ends: 24978 [2021-11-20 06:54:58,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:58,399 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 315 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:58,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 406 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:54:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24978 states. [2021-11-20 06:54:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24978 to 20164. [2021-11-20 06:54:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20164 states, 20163 states have (on average 1.1247830184000396) internal successors, (22679), 20163 states have internal predecessors, (22679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20164 states to 20164 states and 22679 transitions. [2021-11-20 06:54:58,872 INFO L78 Accepts]: Start accepts. Automaton has 20164 states and 22679 transitions. Word has length 302 [2021-11-20 06:54:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:58,873 INFO L470 AbstractCegarLoop]: Abstraction has 20164 states and 22679 transitions. [2021-11-20 06:54:58,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20164 states and 22679 transitions. [2021-11-20 06:54:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-20 06:54:58,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:58,887 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:58,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:54:58,888 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1067278363, now seen corresponding path program 1 times [2021-11-20 06:54:58,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:58,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205557074] [2021-11-20 06:54:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:58,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 56 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:59,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:59,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205557074] [2021-11-20 06:54:59,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205557074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:54:59,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797812123] [2021-11-20 06:54:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:59,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:54:59,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:54:59,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:54:59,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:54:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:59,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:54:59,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:54:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-20 06:54:59,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:54:59,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797812123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:59,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:54:59,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-20 06:54:59,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570795110] [2021-11-20 06:54:59,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:59,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:59,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:54:59,978 INFO L87 Difference]: Start difference. First operand 20164 states and 22679 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:00,633 INFO L93 Difference]: Finished difference Result 20350 states and 22870 transitions. [2021-11-20 06:55:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:00,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 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 311 [2021-11-20 06:55:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:00,661 INFO L225 Difference]: With dead ends: 20350 [2021-11-20 06:55:00,661 INFO L226 Difference]: Without dead ends: 20348 [2021-11-20 06:55:00,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:55:00,667 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:00,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 382 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:55:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20348 states. [2021-11-20 06:55:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20348 to 20164. [2021-11-20 06:55:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20164 states, 20163 states have (on average 1.1247830184000396) internal successors, (22679), 20163 states have internal predecessors, (22679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20164 states to 20164 states and 22679 transitions. [2021-11-20 06:55:01,052 INFO L78 Accepts]: Start accepts. Automaton has 20164 states and 22679 transitions. Word has length 311 [2021-11-20 06:55:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:01,053 INFO L470 AbstractCegarLoop]: Abstraction has 20164 states and 22679 transitions. [2021-11-20 06:55:01,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 20164 states and 22679 transitions. [2021-11-20 06:55:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-20 06:55:01,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:01,067 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:01,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:01,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:55:01,293 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1650248133, now seen corresponding path program 1 times [2021-11-20 06:55:01,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821375516] [2021-11-20 06:55:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:01,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:55:01,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:01,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821375516] [2021-11-20 06:55:01,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821375516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:01,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:01,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:55:01,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111984343] [2021-11-20 06:55:01,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:01,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:01,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:01,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:01,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:01,483 INFO L87 Difference]: Start difference. First operand 20164 states and 22679 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:02,925 INFO L93 Difference]: Finished difference Result 46981 states and 52838 transitions. [2021-11-20 06:55:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:02,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 318 [2021-11-20 06:55:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:03,055 INFO L225 Difference]: With dead ends: 46981 [2021-11-20 06:55:03,055 INFO L226 Difference]: Without dead ends: 29215 [2021-11-20 06:55:03,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:03,079 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 344 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:03,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 78 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:55:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29215 states. [2021-11-20 06:55:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29215 to 26993. [2021-11-20 06:55:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26993 states, 26992 states have (on average 1.121184054534677) internal successors, (30263), 26992 states have internal predecessors, (30263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26993 states to 26993 states and 30263 transitions. [2021-11-20 06:55:03,616 INFO L78 Accepts]: Start accepts. Automaton has 26993 states and 30263 transitions. Word has length 318 [2021-11-20 06:55:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:03,617 INFO L470 AbstractCegarLoop]: Abstraction has 26993 states and 30263 transitions. [2021-11-20 06:55:03,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand 26993 states and 30263 transitions. [2021-11-20 06:55:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-20 06:55:03,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:03,635 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:03,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:55:03,636 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:03,636 INFO L85 PathProgramCache]: Analyzing trace with hash 623756768, now seen corresponding path program 1 times [2021-11-20 06:55:03,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:03,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090871077] [2021-11-20 06:55:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:03,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 57 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:55:03,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:03,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090871077] [2021-11-20 06:55:03,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090871077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:03,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555840705] [2021-11-20 06:55:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:03,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:03,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:03,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:03,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:55:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:03,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:55:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 57 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:55:04,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 57 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:55:07,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555840705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:07,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:07,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2021-11-20 06:55:07,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266845460] [2021-11-20 06:55:07,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:07,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:55:07,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:07,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:55:07,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:55:07,249 INFO L87 Difference]: Start difference. First operand 26993 states and 30263 transitions. Second operand has 10 states, 10 states have (on average 68.9) internal successors, (689), 9 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:10,590 INFO L93 Difference]: Finished difference Result 72084 states and 80692 transitions. [2021-11-20 06:55:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:55:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 68.9) internal successors, (689), 9 states have internal predecessors, (689), 0 states have call successors, (0), 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 329 [2021-11-20 06:55:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:10,627 INFO L225 Difference]: With dead ends: 72084 [2021-11-20 06:55:10,627 INFO L226 Difference]: Without dead ends: 48041 [2021-11-20 06:55:10,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:55:10,640 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 1301 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3572 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 4168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 3572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:10,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 192 Invalid, 4168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 3572 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:55:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48041 states. [2021-11-20 06:55:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48041 to 43060. [2021-11-20 06:55:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43060 states, 43059 states have (on average 1.1203697252606888) internal successors, (48242), 43059 states have internal predecessors, (48242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43060 states to 43060 states and 48242 transitions. [2021-11-20 06:55:11,570 INFO L78 Accepts]: Start accepts. Automaton has 43060 states and 48242 transitions. Word has length 329 [2021-11-20 06:55:11,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:11,571 INFO L470 AbstractCegarLoop]: Abstraction has 43060 states and 48242 transitions. [2021-11-20 06:55:11,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 68.9) internal successors, (689), 9 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 43060 states and 48242 transitions. [2021-11-20 06:55:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-11-20 06:55:11,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:11,591 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:11,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 06:55:11,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:55:11,805 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:11,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 855192324, now seen corresponding path program 1 times [2021-11-20 06:55:11,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:11,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959481792] [2021-11-20 06:55:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:11,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-20 06:55:11,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:11,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959481792] [2021-11-20 06:55:12,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959481792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:12,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:12,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:55:12,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516617693] [2021-11-20 06:55:12,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:12,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:12,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:12,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:12,002 INFO L87 Difference]: Start difference. First operand 43060 states and 48242 transitions. Second operand has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:13,695 INFO L93 Difference]: Finished difference Result 89077 states and 99656 transitions. [2021-11-20 06:55:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:13,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 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 353 [2021-11-20 06:55:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:13,880 INFO L225 Difference]: With dead ends: 89077 [2021-11-20 06:55:13,880 INFO L226 Difference]: Without dead ends: 49153 [2021-11-20 06:55:13,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:13,893 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 341 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:13,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 60 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:55:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49153 states. [2021-11-20 06:55:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49153 to 44711. [2021-11-20 06:55:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44711 states, 44710 states have (on average 1.1186759114292104) internal successors, (50016), 44710 states have internal predecessors, (50016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44711 states to 44711 states and 50016 transitions. [2021-11-20 06:55:14,477 INFO L78 Accepts]: Start accepts. Automaton has 44711 states and 50016 transitions. Word has length 353 [2021-11-20 06:55:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:14,477 INFO L470 AbstractCegarLoop]: Abstraction has 44711 states and 50016 transitions. [2021-11-20 06:55:14,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 4 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 44711 states and 50016 transitions. [2021-11-20 06:55:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-20 06:55:14,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:14,640 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:14,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:55:14,640 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1639835473, now seen corresponding path program 1 times [2021-11-20 06:55:14,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:14,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367874230] [2021-11-20 06:55:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:14,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 160 proven. 133 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-20 06:55:14,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:14,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367874230] [2021-11-20 06:55:14,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367874230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418206424] [2021-11-20 06:55:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:14,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:14,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:14,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:55:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:55:15,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-20 06:55:15,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:55:15,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418206424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:15,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:55:15,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-20 06:55:15,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175261445] [2021-11-20 06:55:15,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:15,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:15,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:15,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:15,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:55:15,800 INFO L87 Difference]: Start difference. First operand 44711 states and 50016 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:16,785 INFO L93 Difference]: Finished difference Result 86097 states and 96328 transitions. [2021-11-20 06:55:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 389 [2021-11-20 06:55:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:16,823 INFO L225 Difference]: With dead ends: 86097 [2021-11-20 06:55:16,823 INFO L226 Difference]: Without dead ends: 44522 [2021-11-20 06:55:16,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:55:16,837 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 197 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:16,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 293 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:55:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44522 states. [2021-11-20 06:55:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44522 to 44153. [2021-11-20 06:55:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44153 states, 44152 states have (on average 1.113063960862475) internal successors, (49144), 44152 states have internal predecessors, (49144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44153 states to 44153 states and 49144 transitions. [2021-11-20 06:55:17,363 INFO L78 Accepts]: Start accepts. Automaton has 44153 states and 49144 transitions. Word has length 389 [2021-11-20 06:55:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:17,364 INFO L470 AbstractCegarLoop]: Abstraction has 44153 states and 49144 transitions. [2021-11-20 06:55:17,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 44153 states and 49144 transitions. [2021-11-20 06:55:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-20 06:55:17,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:17,384 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:17,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:17,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:17,588 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash 830831852, now seen corresponding path program 1 times [2021-11-20 06:55:17,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:17,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958101305] [2021-11-20 06:55:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:17,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-20 06:55:17,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:17,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958101305] [2021-11-20 06:55:17,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958101305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:17,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:17,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:17,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056069114] [2021-11-20 06:55:17,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:17,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:17,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:17,768 INFO L87 Difference]: Start difference. First operand 44153 states and 49144 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:18,797 INFO L93 Difference]: Finished difference Result 84249 states and 93656 transitions. [2021-11-20 06:55:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 404 [2021-11-20 06:55:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:18,837 INFO L225 Difference]: With dead ends: 84249 [2021-11-20 06:55:18,837 INFO L226 Difference]: Without dead ends: 43232 [2021-11-20 06:55:18,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:18,856 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 164 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:18,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 355 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:55:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43232 states. [2021-11-20 06:55:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43232 to 25876. [2021-11-20 06:55:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25876 states, 25875 states have (on average 1.1108405797101448) internal successors, (28743), 25875 states have internal predecessors, (28743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25876 states to 25876 states and 28743 transitions. [2021-11-20 06:55:19,446 INFO L78 Accepts]: Start accepts. Automaton has 25876 states and 28743 transitions. Word has length 404 [2021-11-20 06:55:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:19,447 INFO L470 AbstractCegarLoop]: Abstraction has 25876 states and 28743 transitions. [2021-11-20 06:55:19,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 25876 states and 28743 transitions. [2021-11-20 06:55:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-20 06:55:19,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:19,461 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:19,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:55:19,461 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:19,462 INFO L85 PathProgramCache]: Analyzing trace with hash 908773697, now seen corresponding path program 1 times [2021-11-20 06:55:19,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:19,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258190033] [2021-11-20 06:55:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:19,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-11-20 06:55:19,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:19,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258190033] [2021-11-20 06:55:19,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258190033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:19,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829347968] [2021-11-20 06:55:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:19,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:19,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:19,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:19,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:55:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:55:19,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-11-20 06:55:20,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:55:20,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829347968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:20,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:55:20,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-20 06:55:20,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385983065] [2021-11-20 06:55:20,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:20,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:20,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:20,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:20,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:55:20,861 INFO L87 Difference]: Start difference. First operand 25876 states and 28743 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:21,555 INFO L93 Difference]: Finished difference Result 53035 states and 58857 transitions. [2021-11-20 06:55:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:21,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 426 [2021-11-20 06:55:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:21,588 INFO L225 Difference]: With dead ends: 53035 [2021-11-20 06:55:21,588 INFO L226 Difference]: Without dead ends: 27529 [2021-11-20 06:55:21,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:55:21,599 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 175 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:21,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 135 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:55:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27529 states. [2021-11-20 06:55:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27529 to 24947. [2021-11-20 06:55:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24947 states, 24946 states have (on average 1.1080333520404073) internal successors, (27641), 24946 states have internal predecessors, (27641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24947 states to 24947 states and 27641 transitions. [2021-11-20 06:55:22,025 INFO L78 Accepts]: Start accepts. Automaton has 24947 states and 27641 transitions. Word has length 426 [2021-11-20 06:55:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:22,026 INFO L470 AbstractCegarLoop]: Abstraction has 24947 states and 27641 transitions. [2021-11-20 06:55:22,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 24947 states and 27641 transitions. [2021-11-20 06:55:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-11-20 06:55:22,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:22,043 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:22,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:22,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:55:22,256 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1414202340, now seen corresponding path program 1 times [2021-11-20 06:55:22,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:22,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321884723] [2021-11-20 06:55:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:22,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:55:22,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:22,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321884723] [2021-11-20 06:55:22,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321884723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:22,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:22,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:22,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257250841] [2021-11-20 06:55:22,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:22,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:22,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:22,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:22,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:22,485 INFO L87 Difference]: Start difference. First operand 24947 states and 27641 transitions. Second operand has 4 states, 4 states have (on average 122.25) internal successors, (489), 3 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) [2021-11-20 06:55:23,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:23,980 INFO L93 Difference]: Finished difference Result 58006 states and 64332 transitions. [2021-11-20 06:55:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:23,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 122.25) internal successors, (489), 3 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) Word has length 517 [2021-11-20 06:55:23,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:24,017 INFO L225 Difference]: With dead ends: 58006 [2021-11-20 06:55:24,017 INFO L226 Difference]: Without dead ends: 33429 [2021-11-20 06:55:24,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:55:24,024 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 120 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:24,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 103 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:55:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33429 states. [2021-11-20 06:55:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33429 to 31030. [2021-11-20 06:55:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31030 states, 31029 states have (on average 1.1006477811079958) internal successors, (34152), 31029 states have internal predecessors, (34152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31030 states to 31030 states and 34152 transitions. [2021-11-20 06:55:24,372 INFO L78 Accepts]: Start accepts. Automaton has 31030 states and 34152 transitions. Word has length 517 [2021-11-20 06:55:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:24,373 INFO L470 AbstractCegarLoop]: Abstraction has 31030 states and 34152 transitions. [2021-11-20 06:55:24,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.25) internal successors, (489), 3 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) [2021-11-20 06:55:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 31030 states and 34152 transitions. [2021-11-20 06:55:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2021-11-20 06:55:24,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:24,397 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:24,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 06:55:24,398 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash 348163194, now seen corresponding path program 1 times [2021-11-20 06:55:24,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689406152] [2021-11-20 06:55:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:24,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 29 proven. 394 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-20 06:55:24,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689406152] [2021-11-20 06:55:24,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689406152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882972138] [2021-11-20 06:55:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:24,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:24,897 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:24,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:55:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:55:25,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 29 proven. 394 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-20 06:55:26,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:55:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 29 proven. 394 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-20 06:55:34,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882972138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:55:34,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:55:34,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2021-11-20 06:55:34,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712577984] [2021-11-20 06:55:34,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:55:34,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:55:34,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:34,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:55:34,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:55:34,668 INFO L87 Difference]: Start difference. First operand 31030 states and 34152 transitions. Second operand has 12 states, 12 states have (on average 96.58333333333333) internal successors, (1159), 11 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:41,302 INFO L93 Difference]: Finished difference Result 99845 states and 109861 transitions. [2021-11-20 06:55:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:55:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 96.58333333333333) internal successors, (1159), 11 states have internal predecessors, (1159), 0 states have call successors, (0), 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 555 [2021-11-20 06:55:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:41,384 INFO L225 Difference]: With dead ends: 99845 [2021-11-20 06:55:41,384 INFO L226 Difference]: Without dead ends: 72133 [2021-11-20 06:55:41,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1119 GetRequests, 1102 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:55:41,405 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2006 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 4794 mSolverCounterSat, 1287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 6081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1287 IncrementalHoareTripleChecker+Valid, 4794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:41,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 239 Invalid, 6081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1287 Valid, 4794 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 06:55:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72133 states. [2021-11-20 06:55:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72133 to 43555. [2021-11-20 06:55:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43555 states, 43554 states have (on average 1.100656656105065) internal successors, (47938), 43554 states have internal predecessors, (47938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43555 states to 43555 states and 47938 transitions. [2021-11-20 06:55:42,173 INFO L78 Accepts]: Start accepts. Automaton has 43555 states and 47938 transitions. Word has length 555 [2021-11-20 06:55:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:42,174 INFO L470 AbstractCegarLoop]: Abstraction has 43555 states and 47938 transitions. [2021-11-20 06:55:42,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.58333333333333) internal successors, (1159), 11 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 43555 states and 47938 transitions. [2021-11-20 06:55:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2021-11-20 06:55:42,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:42,213 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:42,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:42,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:42,441 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash 494176387, now seen corresponding path program 1 times [2021-11-20 06:55:42,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:42,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55490971] [2021-11-20 06:55:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:42,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1352 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2021-11-20 06:55:42,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:42,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55490971] [2021-11-20 06:55:42,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55490971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:42,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:42,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:42,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471368899] [2021-11-20 06:55:42,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:42,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:42,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:42,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:42,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:42,724 INFO L87 Difference]: Start difference. First operand 43555 states and 47938 transitions. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:43,633 INFO L93 Difference]: Finished difference Result 86409 states and 95036 transitions. [2021-11-20 06:55:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:43,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 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 824 [2021-11-20 06:55:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:43,682 INFO L225 Difference]: With dead ends: 86409 [2021-11-20 06:55:43,682 INFO L226 Difference]: Without dead ends: 44884 [2021-11-20 06:55:43,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:43,702 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 101 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:43,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 147 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:55:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44884 states. [2021-11-20 06:55:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44884 to 40977. [2021-11-20 06:55:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40977 states, 40976 states have (on average 1.092078289730574) internal successors, (44749), 40976 states have internal predecessors, (44749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40977 states to 40977 states and 44749 transitions. [2021-11-20 06:55:44,533 INFO L78 Accepts]: Start accepts. Automaton has 40977 states and 44749 transitions. Word has length 824 [2021-11-20 06:55:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:44,534 INFO L470 AbstractCegarLoop]: Abstraction has 40977 states and 44749 transitions. [2021-11-20 06:55:44,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 40977 states and 44749 transitions. [2021-11-20 06:55:44,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2021-11-20 06:55:44,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:44,816 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:44,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 06:55:44,816 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash 694363988, now seen corresponding path program 1 times [2021-11-20 06:55:44,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:44,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400221344] [2021-11-20 06:55:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:44,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 1342 proven. 0 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2021-11-20 06:55:45,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400221344] [2021-11-20 06:55:45,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400221344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:45,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:55:45,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:55:45,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601363975] [2021-11-20 06:55:45,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:45,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:45,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:45,193 INFO L87 Difference]: Start difference. First operand 40977 states and 44749 transitions. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:46,153 INFO L93 Difference]: Finished difference Result 72185 states and 78810 transitions. [2021-11-20 06:55:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 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 857 [2021-11-20 06:55:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:46,185 INFO L225 Difference]: With dead ends: 72185 [2021-11-20 06:55:46,185 INFO L226 Difference]: Without dead ends: 31578 [2021-11-20 06:55:46,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:55:46,202 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 74 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:46,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 339 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:55:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31578 states. [2021-11-20 06:55:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31578 to 29544. [2021-11-20 06:55:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29544 states, 29543 states have (on average 1.0833023051145787) internal successors, (32004), 29543 states have internal predecessors, (32004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29544 states to 29544 states and 32004 transitions. [2021-11-20 06:55:46,720 INFO L78 Accepts]: Start accepts. Automaton has 29544 states and 32004 transitions. Word has length 857 [2021-11-20 06:55:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:46,721 INFO L470 AbstractCegarLoop]: Abstraction has 29544 states and 32004 transitions. [2021-11-20 06:55:46,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 29544 states and 32004 transitions. [2021-11-20 06:55:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2021-11-20 06:55:46,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:46,749 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:46,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 06:55:46,750 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash -928684543, now seen corresponding path program 1 times [2021-11-20 06:55:46,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:46,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235675011] [2021-11-20 06:55:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:46,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1561 proven. 511 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-20 06:55:47,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:47,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235675011] [2021-11-20 06:55:47,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235675011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:47,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648401713] [2021-11-20 06:55:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:47,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:47,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:47,337 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:47,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:55:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:47,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:55:47,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1576 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2021-11-20 06:55:48,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:55:48,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648401713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:48,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:55:48,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-11-20 06:55:48,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435955181] [2021-11-20 06:55:48,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:48,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:55:48,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:55:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:55:48,937 INFO L87 Difference]: Start difference. First operand 29544 states and 32004 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:50,105 INFO L93 Difference]: Finished difference Result 63142 states and 68430 transitions. [2021-11-20 06:55:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:55:50,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 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 883 [2021-11-20 06:55:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:50,137 INFO L225 Difference]: With dead ends: 63142 [2021-11-20 06:55:50,138 INFO L226 Difference]: Without dead ends: 33968 [2021-11-20 06:55:50,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:55:50,151 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:50,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 321 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:55:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33968 states. [2021-11-20 06:55:50,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33968 to 32126. [2021-11-20 06:55:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32126 states, 32125 states have (on average 1.077852140077821) internal successors, (34626), 32125 states have internal predecessors, (34626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32126 states to 32126 states and 34626 transitions. [2021-11-20 06:55:50,651 INFO L78 Accepts]: Start accepts. Automaton has 32126 states and 34626 transitions. Word has length 883 [2021-11-20 06:55:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:50,652 INFO L470 AbstractCegarLoop]: Abstraction has 32126 states and 34626 transitions. [2021-11-20 06:55:50,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 32126 states and 34626 transitions. [2021-11-20 06:55:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2021-11-20 06:55:50,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:50,684 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:50,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 06:55:50,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:50,885 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:50,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1330643231, now seen corresponding path program 1 times [2021-11-20 06:55:50,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:50,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656569896] [2021-11-20 06:55:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:50,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2563 backedges. 1714 proven. 629 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-20 06:55:51,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:51,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656569896] [2021-11-20 06:55:51,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656569896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:51,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398379188] [2021-11-20 06:55:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:51,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:51,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:51,774 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:51,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:55:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:52,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:55:52,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2563 backedges. 1175 proven. 0 refuted. 0 times theorem prover too weak. 1388 trivial. 0 not checked. [2021-11-20 06:55:53,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:55:53,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398379188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:55:53,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:55:53,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-11-20 06:55:53,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154411980] [2021-11-20 06:55:53,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:55:53,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:55:53,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:55:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:55:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:55:53,848 INFO L87 Difference]: Start difference. First operand 32126 states and 34626 transitions. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:55:55,471 INFO L93 Difference]: Finished difference Result 69964 states and 75464 transitions. [2021-11-20 06:55:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:55:55,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 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 963 [2021-11-20 06:55:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:55:55,504 INFO L225 Difference]: With dead ends: 69964 [2021-11-20 06:55:55,504 INFO L226 Difference]: Without dead ends: 38208 [2021-11-20 06:55:55,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 963 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:55:55,514 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 214 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:55:55,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 101 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:55:55,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38208 states. [2021-11-20 06:55:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38208 to 31574. [2021-11-20 06:55:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31574 states, 31573 states have (on average 1.0764260602413454) internal successors, (33986), 31573 states have internal predecessors, (33986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31574 states to 31574 states and 33986 transitions. [2021-11-20 06:55:55,974 INFO L78 Accepts]: Start accepts. Automaton has 31574 states and 33986 transitions. Word has length 963 [2021-11-20 06:55:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:55:55,975 INFO L470 AbstractCegarLoop]: Abstraction has 31574 states and 33986 transitions. [2021-11-20 06:55:55,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:55:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 31574 states and 33986 transitions. [2021-11-20 06:55:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 967 [2021-11-20 06:55:56,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:55:56,013 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:55:56,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:55:56,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:55:56,214 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:55:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:55:56,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1776183958, now seen corresponding path program 1 times [2021-11-20 06:55:56,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:55:56,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017393894] [2021-11-20 06:55:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:56,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:55:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 1755 proven. 184 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2021-11-20 06:55:56,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:55:56,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017393894] [2021-11-20 06:55:56,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017393894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:55:56,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799447658] [2021-11-20 06:55:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:55:56,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:55:56,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:55:56,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:55:56,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:55:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:55:57,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:55:57,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:55:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 1627 proven. 434 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-20 06:55:59,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:56:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 2061 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-20 06:56:01,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799447658] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:56:01,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:56:01,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 13 [2021-11-20 06:56:01,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511261409] [2021-11-20 06:56:01,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:56:01,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:56:01,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:56:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:56:01,189 INFO L87 Difference]: Start difference. First operand 31574 states and 33986 transitions. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:02,666 INFO L93 Difference]: Finished difference Result 68674 states and 73993 transitions. [2021-11-20 06:56:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:56:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 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 966 [2021-11-20 06:56:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:02,701 INFO L225 Difference]: With dead ends: 68674 [2021-11-20 06:56:02,701 INFO L226 Difference]: Without dead ends: 39310 [2021-11-20 06:56:02,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1938 GetRequests, 1926 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:56:02,716 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 278 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:02,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 66 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:56:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39310 states. [2021-11-20 06:56:03,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39310 to 37468. [2021-11-20 06:56:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37468 states, 37467 states have (on average 1.0766274321402836) internal successors, (40338), 37467 states have internal predecessors, (40338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37468 states to 37468 states and 40338 transitions. [2021-11-20 06:56:03,262 INFO L78 Accepts]: Start accepts. Automaton has 37468 states and 40338 transitions. Word has length 966 [2021-11-20 06:56:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:03,263 INFO L470 AbstractCegarLoop]: Abstraction has 37468 states and 40338 transitions. [2021-11-20 06:56:03,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 37468 states and 40338 transitions. [2021-11-20 06:56:03,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2021-11-20 06:56:03,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:56:03,297 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:56:03,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:03,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:56:03,498 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:56:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:56:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash 919653917, now seen corresponding path program 1 times [2021-11-20 06:56:03,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:56:03,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277033077] [2021-11-20 06:56:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:03,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:56:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3450 backedges. 2272 proven. 735 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2021-11-20 06:56:04,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:56:04,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277033077] [2021-11-20 06:56:04,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277033077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:56:04,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937825721] [2021-11-20 06:56:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:56:04,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:56:04,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:56:04,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:56:04,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:56:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:56:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:56:04,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:56:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3450 backedges. 2063 proven. 221 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2021-11-20 06:56:07,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:56:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3450 backedges. 1928 proven. 192 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2021-11-20 06:56:11,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937825721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:56:11,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:56:11,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 16 [2021-11-20 06:56:11,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660283654] [2021-11-20 06:56:11,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:56:11,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:56:11,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:56:11,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:56:11,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:56:11,128 INFO L87 Difference]: Start difference. First operand 37468 states and 40338 transitions. Second operand has 16 states, 16 states have (on average 103.375) internal successors, (1654), 16 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:56:20,786 INFO L93 Difference]: Finished difference Result 92956 states and 99924 transitions. [2021-11-20 06:56:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 06:56:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 103.375) internal successors, (1654), 16 states have internal predecessors, (1654), 0 states have call successors, (0), 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 1078 [2021-11-20 06:56:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:56:20,788 INFO L225 Difference]: With dead ends: 92956 [2021-11-20 06:56:20,788 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 06:56:20,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2236 GetRequests, 2185 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=642, Invalid=2114, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 06:56:20,817 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 2060 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 12497 mSolverCounterSat, 898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2060 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 13395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 898 IncrementalHoareTripleChecker+Valid, 12497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:56:20,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2060 Valid, 361 Invalid, 13395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [898 Valid, 12497 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-20 06:56:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 06:56:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 06:56:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 06:56:20,819 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1078 [2021-11-20 06:56:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:56:20,820 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 06:56:20,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 103.375) internal successors, (1654), 16 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:56:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 06:56:20,821 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 06:56:20,824 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:56:20,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:56:21,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca2b2563-0954-4eb3-8041-208becd234d0/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:56:21,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.