./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label29.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label29.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0 --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 e1d19cb304638f43d39081097001c07d13a3f7b236de84abf3505fba1ece23c0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:21:22,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:21:22,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:21:22,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:21:22,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:21:22,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:21:22,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:21:22,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:21:22,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:21:22,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:21:22,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:21:22,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:21:22,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:21:22,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:21:22,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:21:22,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:21:22,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:21:22,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:21:22,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:21:22,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:21:22,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:21:22,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:21:22,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:21:22,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:21:22,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:21:22,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:21:22,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:21:22,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:21:22,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:21:22,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:21:22,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:21:22,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:21:22,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:21:22,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:21:22,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:21:22,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:21:22,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:21:22,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:21:22,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:21:22,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:21:22,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:21:22,743 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:21:22,783 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:21:22,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:21:22,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:21:22,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:21:22,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:21:22,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:21:22,787 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:21:22,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:21:22,788 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:21:22,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:21:22,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:21:22,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:21:22,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:21:22,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:21:22,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:21:22,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:21:22,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:21:22,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:21:22,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:21:22,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:21:22,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:21:22,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:21:22,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:21:22,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:21:22,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:21:22,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:21:22,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:21:22,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:21:22,792 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:21:22,792 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:21:22,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:21:22,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:21:22,792 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_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1d19cb304638f43d39081097001c07d13a3f7b236de84abf3505fba1ece23c0 [2021-11-22 16:21:23,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:21:23,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:21:23,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:21:23,103 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:21:23,104 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:21:23,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/eca-rers2012/Problem17_label29.c [2021-11-22 16:21:23,162 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/data/5a96345e3/486e888517cf47d6a10473d06356c605/FLAG8296e627d [2021-11-22 16:21:23,874 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:21:23,875 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/sv-benchmarks/c/eca-rers2012/Problem17_label29.c [2021-11-22 16:21:23,903 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/data/5a96345e3/486e888517cf47d6a10473d06356c605/FLAG8296e627d [2021-11-22 16:21:23,995 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/data/5a96345e3/486e888517cf47d6a10473d06356c605 [2021-11-22 16:21:23,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:21:24,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:21:24,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:21:24,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:21:24,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:21:24,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:21:23" (1/1) ... [2021-11-22 16:21:24,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154eaa51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:24, skipping insertion in model container [2021-11-22 16:21:24,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:21:23" (1/1) ... [2021-11-22 16:21:24,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:21:24,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:21:24,419 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_ab51a90e-65d6-4dbc-8873-a335234edb58/sv-benchmarks/c/eca-rers2012/Problem17_label29.c[9671,9684] [2021-11-22 16:21:25,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:21:25,120 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:21:25,167 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_ab51a90e-65d6-4dbc-8873-a335234edb58/sv-benchmarks/c/eca-rers2012/Problem17_label29.c[9671,9684] [2021-11-22 16:21:25,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:21:25,593 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:21:25,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25 WrapperNode [2021-11-22 16:21:25,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:21:25,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:21:25,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:21:25,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:21:25,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:25,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:25,970 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-22 16:21:25,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:21:25,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:21:25,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:21:25,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:21:25,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:25,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:21:26,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:21:26,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:21:26,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:21:26,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:21:26,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:26,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:21:26,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:21:26,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:21:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:21:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:21:26,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:21:26,657 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:21:26,658 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:21:30,747 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:21:30,762 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:21:30,763 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 16:21:30,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:21:30 BoogieIcfgContainer [2021-11-22 16:21:30,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:21:30,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:21:30,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:21:30,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:21:30,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:21:23" (1/3) ... [2021-11-22 16:21:30,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbd3f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:21:30, skipping insertion in model container [2021-11-22 16:21:30,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (2/3) ... [2021-11-22 16:21:30,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbd3f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:21:30, skipping insertion in model container [2021-11-22 16:21:30,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:21:30" (3/3) ... [2021-11-22 16:21:30,778 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label29.c [2021-11-22 16:21:30,784 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:21:30,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 16:21:30,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:21:30,847 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 [2021-11-22 16:21:30,848 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 16:21:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 16:21:30,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:30,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:30,889 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:30,895 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-11-22 16:21:30,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:30,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531485626] [2021-11-22 16:21:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:30,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:31,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:31,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531485626] [2021-11-22 16:21:31,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531485626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:31,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:31,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:21:31,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376675272] [2021-11-22 16:21:31,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:31,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:31,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:31,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:31,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:31,278 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:34,538 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-11-22 16:21:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:34,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-22 16:21:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:34,564 INFO L225 Difference]: With dead ends: 1642 [2021-11-22 16:21:34,564 INFO L226 Difference]: Without dead ends: 975 [2021-11-22 16:21:34,571 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 [2021-11-22 16:21:34,574 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 425 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:34,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-22 16:21:34,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-22 16:21:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-11-22 16:21:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-11-22 16:21:34,669 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 65 [2021-11-22 16:21:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:34,670 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-11-22 16:21:34,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-11-22 16:21:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-22 16:21:34,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:34,677 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 16:21:34,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:21:34,677 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:34,678 INFO L85 PathProgramCache]: Analyzing trace with hash -530244436, now seen corresponding path program 1 times [2021-11-22 16:21:34,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:34,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645359124] [2021-11-22 16:21:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:34,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:34,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:34,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645359124] [2021-11-22 16:21:34,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645359124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:34,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:34,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:34,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576565281] [2021-11-22 16:21:34,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:34,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:34,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:34,872 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:37,700 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-11-22 16:21:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:37,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-11-22 16:21:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:37,711 INFO L225 Difference]: With dead ends: 2814 [2021-11-22 16:21:37,711 INFO L226 Difference]: Without dead ends: 1844 [2021-11-22 16:21:37,720 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 [2021-11-22 16:21:37,723 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 426 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:37,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-22 16:21:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-22 16:21:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-11-22 16:21:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-11-22 16:21:37,795 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 135 [2021-11-22 16:21:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:37,797 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-11-22 16:21:37,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-11-22 16:21:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-22 16:21:37,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:37,814 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 16:21:37,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:21:37,815 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1302726167, now seen corresponding path program 1 times [2021-11-22 16:21:37,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:37,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744424206] [2021-11-22 16:21:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:37,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:37,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:37,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744424206] [2021-11-22 16:21:37,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744424206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:37,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:37,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:21:37,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788928646] [2021-11-22 16:21:37,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:37,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:38,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:38,003 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:40,647 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2021-11-22 16:21:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:40,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-22 16:21:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:40,662 INFO L225 Difference]: With dead ends: 5395 [2021-11-22 16:21:40,662 INFO L226 Difference]: Without dead ends: 2701 [2021-11-22 16:21:40,666 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 [2021-11-22 16:21:40,667 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:40,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-22 16:21:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-11-22 16:21:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2021-11-22 16:21:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2021-11-22 16:21:40,782 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 157 [2021-11-22 16:21:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:40,783 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2021-11-22 16:21:40,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2021-11-22 16:21:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-22 16:21:40,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:40,790 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:40,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 16:21:40,791 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1860732790, now seen corresponding path program 1 times [2021-11-22 16:21:40,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:40,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343567588] [2021-11-22 16:21:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:40,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:40,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:40,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343567588] [2021-11-22 16:21:40,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343567588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:40,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:41,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:41,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367764694] [2021-11-22 16:21:41,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:41,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:41,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:41,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:41,002 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:43,205 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2021-11-22 16:21:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2021-11-22 16:21:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:43,229 INFO L225 Difference]: With dead ends: 7108 [2021-11-22 16:21:43,230 INFO L226 Difference]: Without dead ends: 4409 [2021-11-22 16:21:43,234 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 [2021-11-22 16:21:43,236 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:43,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-22 16:21:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-11-22 16:21:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2021-11-22 16:21:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2021-11-22 16:21:43,354 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 217 [2021-11-22 16:21:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:43,355 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2021-11-22 16:21:43,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2021-11-22 16:21:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-22 16:21:43,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:43,360 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:43,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 16:21:43,361 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:43,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1568238683, now seen corresponding path program 1 times [2021-11-22 16:21:43,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:43,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682321088] [2021-11-22 16:21:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:43,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-22 16:21:43,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:43,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682321088] [2021-11-22 16:21:43,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682321088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:43,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:43,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:43,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851365350] [2021-11-22 16:21:43,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:43,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:43,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:43,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:43,548 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:45,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:45,843 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2021-11-22 16:21:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-11-22 16:21:45,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:45,881 INFO L225 Difference]: With dead ends: 10936 [2021-11-22 16:21:45,881 INFO L226 Difference]: Without dead ends: 6528 [2021-11-22 16:21:45,886 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 [2021-11-22 16:21:45,887 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 386 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:45,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-22 16:21:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-11-22 16:21:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2021-11-22 16:21:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2021-11-22 16:21:46,007 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 219 [2021-11-22 16:21:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:46,008 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2021-11-22 16:21:46,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2021-11-22 16:21:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-22 16:21:46,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:46,018 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:46,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 16:21:46,018 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:46,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1846468523, now seen corresponding path program 1 times [2021-11-22 16:21:46,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:46,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24487294] [2021-11-22 16:21:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:46,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-22 16:21:46,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:46,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24487294] [2021-11-22 16:21:46,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24487294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:46,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:46,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:46,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963939809] [2021-11-22 16:21:46,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:46,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:46,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:46,196 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:48,534 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2021-11-22 16:21:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:48,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 285 [2021-11-22 16:21:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:48,562 INFO L225 Difference]: With dead ends: 10045 [2021-11-22 16:21:48,562 INFO L226 Difference]: Without dead ends: 5665 [2021-11-22 16:21:48,568 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 [2021-11-22 16:21:48,569 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 371 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:48,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-22 16:21:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2021-11-22 16:21:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2021-11-22 16:21:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2021-11-22 16:21:48,690 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 285 [2021-11-22 16:21:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:48,691 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2021-11-22 16:21:48,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:48,691 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2021-11-22 16:21:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-22 16:21:48,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:48,697 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:48,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 16:21:48,698 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:48,698 INFO L85 PathProgramCache]: Analyzing trace with hash 306835577, now seen corresponding path program 1 times [2021-11-22 16:21:48,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:48,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294675722] [2021-11-22 16:21:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:48,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-22 16:21:48,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:48,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294675722] [2021-11-22 16:21:48,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294675722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:48,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:48,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:48,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540767562] [2021-11-22 16:21:48,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:48,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:48,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:48,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:48,874 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 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) [2021-11-22 16:21:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:50,907 INFO L93 Difference]: Finished difference Result 12593 states and 14783 transitions. [2021-11-22 16:21:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:50,907 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 297 [2021-11-22 16:21:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:50,941 INFO L225 Difference]: With dead ends: 12593 [2021-11-22 16:21:50,942 INFO L226 Difference]: Without dead ends: 6936 [2021-11-22 16:21:50,947 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 [2021-11-22 16:21:50,948 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:50,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 847 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-22 16:21:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6936 states. [2021-11-22 16:21:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6936 to 6936. [2021-11-22 16:21:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6935 states have (on average 1.1322278298485942) internal successors, (7852), 6935 states have internal predecessors, (7852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 7852 transitions. [2021-11-22 16:21:51,087 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 7852 transitions. Word has length 297 [2021-11-22 16:21:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:51,088 INFO L470 AbstractCegarLoop]: Abstraction has 6936 states and 7852 transitions. [2021-11-22 16:21:51,088 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) [2021-11-22 16:21:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 7852 transitions. [2021-11-22 16:21:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-22 16:21:51,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:51,096 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, 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, 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, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:51,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 16:21:51,097 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash -672579372, now seen corresponding path program 1 times [2021-11-22 16:21:51,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:51,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671152314] [2021-11-22 16:21:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:51,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-22 16:21:51,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:51,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671152314] [2021-11-22 16:21:51,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671152314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:51,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:51,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:51,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227557746] [2021-11-22 16:21:51,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:51,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:51,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:51,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:51,273 INFO L87 Difference]: Start difference. First operand 6936 states and 7852 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:53,311 INFO L93 Difference]: Finished difference Result 17279 states and 19683 transitions. [2021-11-22 16:21:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:53,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 337 [2021-11-22 16:21:53,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:53,340 INFO L225 Difference]: With dead ends: 17279 [2021-11-22 16:21:53,340 INFO L226 Difference]: Without dead ends: 9468 [2021-11-22 16:21:53,349 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 [2021-11-22 16:21:53,350 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 480 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:53,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 640 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-22 16:21:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9468 states. [2021-11-22 16:21:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9468 to 9038. [2021-11-22 16:21:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9037 states have (on average 1.1249308398804914) internal successors, (10166), 9037 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 10166 transitions. [2021-11-22 16:21:53,501 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 10166 transitions. Word has length 337 [2021-11-22 16:21:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:53,502 INFO L470 AbstractCegarLoop]: Abstraction has 9038 states and 10166 transitions. [2021-11-22 16:21:53,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 10166 transitions. [2021-11-22 16:21:53,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-22 16:21:53,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:53,515 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:53,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 16:21:53,516 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash 488558404, now seen corresponding path program 1 times [2021-11-22 16:21:53,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:53,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493017712] [2021-11-22 16:21:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:53,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:53,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493017712] [2021-11-22 16:21:53,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493017712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:53,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:53,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:53,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565385113] [2021-11-22 16:21:53,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:53,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:21:53,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:21:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:21:53,739 INFO L87 Difference]: Start difference. First operand 9038 states and 10166 transitions. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:56,398 INFO L93 Difference]: Finished difference Result 23201 states and 26057 transitions. [2021-11-22 16:21:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:21:56,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 [2021-11-22 16:21:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:56,424 INFO L225 Difference]: With dead ends: 23201 [2021-11-22 16:21:56,425 INFO L226 Difference]: Without dead ends: 13740 [2021-11-22 16:21:56,434 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 [2021-11-22 16:21:56,435 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 587 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:56,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 179 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-22 16:21:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13740 states. [2021-11-22 16:21:56,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13740 to 13737. [2021-11-22 16:21:56,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 1.1252912055911473) internal successors, (15457), 13736 states have internal predecessors, (15457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 15457 transitions. [2021-11-22 16:21:56,674 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 15457 transitions. Word has length 404 [2021-11-22 16:21:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:56,675 INFO L470 AbstractCegarLoop]: Abstraction has 13737 states and 15457 transitions. [2021-11-22 16:21:56,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:56,675 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 15457 transitions. [2021-11-22 16:21:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-11-22 16:21:56,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:56,689 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:56,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 16:21:56,689 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:56,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1240494826, now seen corresponding path program 1 times [2021-11-22 16:21:56,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:56,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150805372] [2021-11-22 16:21:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:56,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-22 16:21:56,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150805372] [2021-11-22 16:21:56,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150805372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:56,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:56,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:56,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515270075] [2021-11-22 16:21:56,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:56,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:56,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:56,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:56,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:56,884 INFO L87 Difference]: Start difference. First operand 13737 states and 15457 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:58,632 INFO L93 Difference]: Finished difference Result 30450 states and 34316 transitions. [2021-11-22 16:21:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:58,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 408 [2021-11-22 16:21:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:58,665 INFO L225 Difference]: With dead ends: 30450 [2021-11-22 16:21:58,665 INFO L226 Difference]: Without dead ends: 16715 [2021-11-22 16:21:58,678 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 [2021-11-22 16:21:58,679 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 419 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:58,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 288 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-22 16:21:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16715 states. [2021-11-22 16:21:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16715 to 15436. [2021-11-22 16:21:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15436 states, 15435 states have (on average 1.1231616456106253) internal successors, (17336), 15435 states have internal predecessors, (17336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15436 states to 15436 states and 17336 transitions. [2021-11-22 16:21:58,954 INFO L78 Accepts]: Start accepts. Automaton has 15436 states and 17336 transitions. Word has length 408 [2021-11-22 16:21:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:58,955 INFO L470 AbstractCegarLoop]: Abstraction has 15436 states and 17336 transitions. [2021-11-22 16:21:58,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 15436 states and 17336 transitions. [2021-11-22 16:21:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2021-11-22 16:21:59,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:59,001 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:59,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 16:21:59,002 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:59,003 INFO L85 PathProgramCache]: Analyzing trace with hash 255466079, now seen corresponding path program 1 times [2021-11-22 16:21:59,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:59,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925818465] [2021-11-22 16:21:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:59,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 286 proven. 78 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-22 16:21:59,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925818465] [2021-11-22 16:21:59,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925818465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841911390] [2021-11-22 16:21:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:59,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:59,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:59,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:59,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:21:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:59,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:21:59,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 286 proven. 78 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-22 16:22:01,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 364 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-22 16:22:02,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841911390] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:02,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:22:02,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-11-22 16:22:02,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740324539] [2021-11-22 16:22:02,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:02,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:22:02,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:02,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:22:02,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:22:02,316 INFO L87 Difference]: Start difference. First operand 15436 states and 17336 transitions. Second operand has 4 states, 4 states have (on average 145.0) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:05,631 INFO L93 Difference]: Finished difference Result 41546 states and 46946 transitions. [2021-11-22 16:22:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:22:05,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 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 642 [2021-11-22 16:22:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:05,670 INFO L225 Difference]: With dead ends: 41546 [2021-11-22 16:22:05,670 INFO L226 Difference]: Without dead ends: 26112 [2021-11-22 16:22:05,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1285 GetRequests, 1279 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:22:05,688 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 829 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:05,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 176 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-22 16:22:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26112 states. [2021-11-22 16:22:05,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26112 to 24405. [2021-11-22 16:22:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 1.1314538600229471) internal successors, (27612), 24404 states have internal predecessors, (27612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 27612 transitions. [2021-11-22 16:22:06,039 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 27612 transitions. Word has length 642 [2021-11-22 16:22:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 24405 states and 27612 transitions. [2021-11-22 16:22:06,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 27612 transitions. [2021-11-22 16:22:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2021-11-22 16:22:06,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:06,063 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:06,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:06,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:06,284 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:06,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash 448966583, now seen corresponding path program 1 times [2021-11-22 16:22:06,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:06,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866431262] [2021-11-22 16:22:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:06,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-22 16:22:06,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:06,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866431262] [2021-11-22 16:22:06,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866431262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:06,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:06,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:22:06,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084057032] [2021-11-22 16:22:06,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:06,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:22:06,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:06,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:22:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:22:06,740 INFO L87 Difference]: Start difference. First operand 24405 states and 27612 transitions. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:08,708 INFO L93 Difference]: Finished difference Result 55626 states and 63147 transitions. [2021-11-22 16:22:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:22:08,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 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 668 [2021-11-22 16:22:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:08,745 INFO L225 Difference]: With dead ends: 55626 [2021-11-22 16:22:08,745 INFO L226 Difference]: Without dead ends: 30791 [2021-11-22 16:22:08,760 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 [2021-11-22 16:22:08,761 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 100 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:08,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 611 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-22 16:22:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30791 states. [2021-11-22 16:22:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30791 to 29935. [2021-11-22 16:22:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29935 states, 29934 states have (on average 1.1269459477517205) internal successors, (33734), 29934 states have internal predecessors, (33734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29935 states to 29935 states and 33734 transitions. [2021-11-22 16:22:09,355 INFO L78 Accepts]: Start accepts. Automaton has 29935 states and 33734 transitions. Word has length 668 [2021-11-22 16:22:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:09,357 INFO L470 AbstractCegarLoop]: Abstraction has 29935 states and 33734 transitions. [2021-11-22 16:22:09,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 29935 states and 33734 transitions. [2021-11-22 16:22:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2021-11-22 16:22:09,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:09,381 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 16:22:09,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 16:22:09,381 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:09,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2104954898, now seen corresponding path program 1 times [2021-11-22 16:22:09,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:09,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550293776] [2021-11-22 16:22:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:09,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-11-22 16:22:09,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:09,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550293776] [2021-11-22 16:22:09,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550293776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:09,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:09,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:22:09,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098297756] [2021-11-22 16:22:09,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:09,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:22:09,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:09,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:22:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:22:09,876 INFO L87 Difference]: Start difference. First operand 29935 states and 33734 transitions. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:11,843 INFO L93 Difference]: Finished difference Result 65824 states and 74204 transitions. [2021-11-22 16:22:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:22:11,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 709 [2021-11-22 16:22:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:11,886 INFO L225 Difference]: With dead ends: 65824 [2021-11-22 16:22:11,887 INFO L226 Difference]: Without dead ends: 35891 [2021-11-22 16:22:11,903 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 [2021-11-22 16:22:11,904 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 488 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:11,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 671 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-22 16:22:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35891 states. [2021-11-22 16:22:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35891 to 35887. [2021-11-22 16:22:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35887 states, 35886 states have (on average 1.1147801371008192) internal successors, (40005), 35886 states have internal predecessors, (40005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35887 states to 35887 states and 40005 transitions. [2021-11-22 16:22:12,473 INFO L78 Accepts]: Start accepts. Automaton has 35887 states and 40005 transitions. Word has length 709 [2021-11-22 16:22:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:12,473 INFO L470 AbstractCegarLoop]: Abstraction has 35887 states and 40005 transitions. [2021-11-22 16:22:12,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 35887 states and 40005 transitions. [2021-11-22 16:22:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2021-11-22 16:22:12,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:12,650 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:12,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 16:22:12,650 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:12,651 INFO L85 PathProgramCache]: Analyzing trace with hash -865502091, now seen corresponding path program 1 times [2021-11-22 16:22:12,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:12,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453799284] [2021-11-22 16:22:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:12,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 762 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-22 16:22:13,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:13,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453799284] [2021-11-22 16:22:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453799284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:13,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:13,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:22:13,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874234547] [2021-11-22 16:22:13,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:13,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:22:13,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:13,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:22:13,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:22:13,086 INFO L87 Difference]: Start difference. First operand 35887 states and 40005 transitions. Second operand has 4 states, 4 states have (on average 181.5) internal successors, (726), 4 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:16,806 INFO L93 Difference]: Finished difference Result 97358 states and 108372 transitions. [2021-11-22 16:22:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:22:16,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 181.5) internal successors, (726), 4 states have internal predecessors, (726), 0 states have call successors, (0), 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 788 [2021-11-22 16:22:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:16,980 INFO L225 Difference]: With dead ends: 97358 [2021-11-22 16:22:16,980 INFO L226 Difference]: Without dead ends: 61473 [2021-11-22 16:22:16,995 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 [2021-11-22 16:22:17,004 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 757 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:17,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 190 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-22 16:22:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61473 states. [2021-11-22 16:22:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61473 to 58913. [2021-11-22 16:22:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58913 states, 58912 states have (on average 1.1089421510048887) internal successors, (65330), 58912 states have internal predecessors, (65330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58913 states to 58913 states and 65330 transitions. [2021-11-22 16:22:17,865 INFO L78 Accepts]: Start accepts. Automaton has 58913 states and 65330 transitions. Word has length 788 [2021-11-22 16:22:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:17,866 INFO L470 AbstractCegarLoop]: Abstraction has 58913 states and 65330 transitions. [2021-11-22 16:22:17,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.5) internal successors, (726), 4 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 58913 states and 65330 transitions. [2021-11-22 16:22:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2021-11-22 16:22:17,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:17,906 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:17,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 16:22:17,907 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:17,908 INFO L85 PathProgramCache]: Analyzing trace with hash 285592111, now seen corresponding path program 1 times [2021-11-22 16:22:17,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:17,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465916316] [2021-11-22 16:22:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:17,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 524 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-22 16:22:18,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:18,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465916316] [2021-11-22 16:22:18,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465916316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:18,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:22:18,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818000481] [2021-11-22 16:22:18,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:18,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:22:18,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:22:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:22:18,451 INFO L87 Difference]: Start difference. First operand 58913 states and 65330 transitions. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 2 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:20,086 INFO L93 Difference]: Finished difference Result 116961 states and 129596 transitions. [2021-11-22 16:22:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:22:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 2 states have internal predecessors, (552), 0 states have call successors, (0), 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 819 [2021-11-22 16:22:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:20,137 INFO L225 Difference]: With dead ends: 116961 [2021-11-22 16:22:20,138 INFO L226 Difference]: Without dead ends: 58049 [2021-11-22 16:22:20,163 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 [2021-11-22 16:22:20,164 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 591 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:20,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 91 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-22 16:22:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58049 states. [2021-11-22 16:22:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58049 to 58048. [2021-11-22 16:22:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58048 states, 58047 states have (on average 1.1067927713749204) internal successors, (64246), 58047 states have internal predecessors, (64246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58048 states to 58048 states and 64246 transitions. [2021-11-22 16:22:20,934 INFO L78 Accepts]: Start accepts. Automaton has 58048 states and 64246 transitions. Word has length 819 [2021-11-22 16:22:20,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:20,934 INFO L470 AbstractCegarLoop]: Abstraction has 58048 states and 64246 transitions. [2021-11-22 16:22:20,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 2 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 58048 states and 64246 transitions. [2021-11-22 16:22:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2021-11-22 16:22:20,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:20,968 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:20,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 16:22:20,968 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2037369336, now seen corresponding path program 1 times [2021-11-22 16:22:20,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:20,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092282494] [2021-11-22 16:22:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:20,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 691 proven. 0 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2021-11-22 16:22:21,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:21,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092282494] [2021-11-22 16:22:21,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092282494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:21,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:21,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:22:21,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930044573] [2021-11-22 16:22:21,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:21,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:22:21,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:22:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:22:21,520 INFO L87 Difference]: Start difference. First operand 58048 states and 64246 transitions. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:23,831 INFO L93 Difference]: Finished difference Result 140333 states and 155038 transitions. [2021-11-22 16:22:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:22:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 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 843 [2021-11-22 16:22:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:23,903 INFO L225 Difference]: With dead ends: 140333 [2021-11-22 16:22:23,903 INFO L226 Difference]: Without dead ends: 81861 [2021-11-22 16:22:23,927 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 [2021-11-22 16:22:23,928 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 470 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:23,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 228 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-22 16:22:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81861 states. [2021-11-22 16:22:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81861 to 79722. [2021-11-22 16:22:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79722 states, 79721 states have (on average 1.0953575594887168) internal successors, (87323), 79721 states have internal predecessors, (87323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79722 states to 79722 states and 87323 transitions. [2021-11-22 16:22:25,172 INFO L78 Accepts]: Start accepts. Automaton has 79722 states and 87323 transitions. Word has length 843 [2021-11-22 16:22:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:25,172 INFO L470 AbstractCegarLoop]: Abstraction has 79722 states and 87323 transitions. [2021-11-22 16:22:25,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 79722 states and 87323 transitions. [2021-11-22 16:22:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2021-11-22 16:22:25,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:25,225 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:25,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 16:22:25,226 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash -25124057, now seen corresponding path program 1 times [2021-11-22 16:22:25,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:25,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943327280] [2021-11-22 16:22:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:25,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 627 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-22 16:22:25,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:25,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943327280] [2021-11-22 16:22:25,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943327280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:25,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:25,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:22:25,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889550886] [2021-11-22 16:22:25,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:25,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:22:25,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:22:25,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:22:25,700 INFO L87 Difference]: Start difference. First operand 79722 states and 87323 transitions. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:29,170 INFO L93 Difference]: Finished difference Result 168808 states and 184636 transitions. [2021-11-22 16:22:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:22:29,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 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 859 [2021-11-22 16:22:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:29,523 INFO L225 Difference]: With dead ends: 168808 [2021-11-22 16:22:29,527 INFO L226 Difference]: Without dead ends: 89088 [2021-11-22 16:22:29,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:22:29,576 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 501 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2764 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:29,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 367 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2764 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-22 16:22:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89088 states. [2021-11-22 16:22:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89088 to 86957. [2021-11-22 16:22:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86957 states, 86956 states have (on average 1.0917130502783017) internal successors, (94931), 86956 states have internal predecessors, (94931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86957 states to 86957 states and 94931 transitions. [2021-11-22 16:22:30,560 INFO L78 Accepts]: Start accepts. Automaton has 86957 states and 94931 transitions. Word has length 859 [2021-11-22 16:22:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:30,561 INFO L470 AbstractCegarLoop]: Abstraction has 86957 states and 94931 transitions. [2021-11-22 16:22:30,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 86957 states and 94931 transitions. [2021-11-22 16:22:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2021-11-22 16:22:30,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:30,869 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:30,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 16:22:30,870 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:30,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:30,892 INFO L85 PathProgramCache]: Analyzing trace with hash 390148821, now seen corresponding path program 1 times [2021-11-22 16:22:30,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:30,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919692215] [2021-11-22 16:22:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:30,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-11-22 16:22:31,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:31,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919692215] [2021-11-22 16:22:31,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919692215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:31,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:31,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:22:31,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186742179] [2021-11-22 16:22:31,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:22:31,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:22:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:22:31,278 INFO L87 Difference]: Start difference. First operand 86957 states and 94931 transitions. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:34,108 INFO L93 Difference]: Finished difference Result 182422 states and 199074 transitions. [2021-11-22 16:22:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:22:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 860 [2021-11-22 16:22:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:34,212 INFO L225 Difference]: With dead ends: 182422 [2021-11-22 16:22:34,212 INFO L226 Difference]: Without dead ends: 95467 [2021-11-22 16:22:34,229 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 [2021-11-22 16:22:34,230 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 499 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:34,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 205 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-22 16:22:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95467 states. [2021-11-22 16:22:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95467 to 91207. [2021-11-22 16:22:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91207 states, 91206 states have (on average 1.084139201368331) internal successors, (98880), 91206 states have internal predecessors, (98880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91207 states to 91207 states and 98880 transitions. [2021-11-22 16:22:35,292 INFO L78 Accepts]: Start accepts. Automaton has 91207 states and 98880 transitions. Word has length 860 [2021-11-22 16:22:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:35,293 INFO L470 AbstractCegarLoop]: Abstraction has 91207 states and 98880 transitions. [2021-11-22 16:22:35,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 91207 states and 98880 transitions. [2021-11-22 16:22:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2021-11-22 16:22:35,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:35,325 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:35,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 16:22:35,326 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1874535863, now seen corresponding path program 1 times [2021-11-22 16:22:35,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:35,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912809511] [2021-11-22 16:22:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:35,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 655 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-22 16:22:36,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:36,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912809511] [2021-11-22 16:22:36,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912809511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:36,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:36,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:22:36,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591596333] [2021-11-22 16:22:36,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:36,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:22:36,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:36,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:22:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:22:36,077 INFO L87 Difference]: Start difference. First operand 91207 states and 98880 transitions. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:39,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:39,931 INFO L93 Difference]: Finished difference Result 213088 states and 230372 transitions. [2021-11-22 16:22:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:22:39,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 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 872 [2021-11-22 16:22:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:40,052 INFO L225 Difference]: With dead ends: 213088 [2021-11-22 16:22:40,052 INFO L226 Difference]: Without dead ends: 118480 [2021-11-22 16:22:40,082 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 [2021-11-22 16:22:40,082 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 649 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:40,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 195 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2492 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-22 16:22:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118480 states. [2021-11-22 16:22:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118480 to 81792. [2021-11-22 16:22:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81792 states, 81791 states have (on average 1.0795931092663007) internal successors, (88301), 81791 states have internal predecessors, (88301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81792 states to 81792 states and 88301 transitions. [2021-11-22 16:22:41,414 INFO L78 Accepts]: Start accepts. Automaton has 81792 states and 88301 transitions. Word has length 872 [2021-11-22 16:22:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:41,415 INFO L470 AbstractCegarLoop]: Abstraction has 81792 states and 88301 transitions. [2021-11-22 16:22:41,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 81792 states and 88301 transitions. [2021-11-22 16:22:41,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 891 [2021-11-22 16:22:41,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:41,446 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:41,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 16:22:41,446 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash 30094889, now seen corresponding path program 1 times [2021-11-22 16:22:41,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:41,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021663464] [2021-11-22 16:22:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:41,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 1075 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-22 16:22:42,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:42,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021663464] [2021-11-22 16:22:42,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021663464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:42,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:42,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:22:42,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854984819] [2021-11-22 16:22:42,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:42,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:22:42,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:22:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:22:42,288 INFO L87 Difference]: Start difference. First operand 81792 states and 88301 transitions. Second operand has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:45,459 INFO L93 Difference]: Finished difference Result 171247 states and 184868 transitions. [2021-11-22 16:22:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:22:45,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 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 890 [2021-11-22 16:22:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:45,543 INFO L225 Difference]: With dead ends: 171247 [2021-11-22 16:22:45,543 INFO L226 Difference]: Without dead ends: 89457 [2021-11-22 16:22:45,575 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 [2021-11-22 16:22:45,576 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 455 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:45,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 144 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-22 16:22:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89457 states. [2021-11-22 16:22:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89457 to 80942. [2021-11-22 16:22:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80942 states, 80941 states have (on average 1.0752029255877738) internal successors, (87028), 80941 states have internal predecessors, (87028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80942 states to 80942 states and 87028 transitions. [2021-11-22 16:22:46,943 INFO L78 Accepts]: Start accepts. Automaton has 80942 states and 87028 transitions. Word has length 890 [2021-11-22 16:22:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:46,944 INFO L470 AbstractCegarLoop]: Abstraction has 80942 states and 87028 transitions. [2021-11-22 16:22:46,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:46,944 INFO L276 IsEmpty]: Start isEmpty. Operand 80942 states and 87028 transitions. [2021-11-22 16:22:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2021-11-22 16:22:46,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:46,987 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:46,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 16:22:46,987 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:46,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1783607746, now seen corresponding path program 1 times [2021-11-22 16:22:46,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:46,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664970610] [2021-11-22 16:22:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:46,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 950 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-22 16:22:47,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:47,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664970610] [2021-11-22 16:22:47,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664970610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:47,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:22:47,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:22:47,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743921950] [2021-11-22 16:22:47,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:47,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:22:47,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:22:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:22:47,623 INFO L87 Difference]: Start difference. First operand 80942 states and 87028 transitions. Second operand has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 6 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:22:54,389 INFO L93 Difference]: Finished difference Result 211052 states and 226030 transitions. [2021-11-22 16:22:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 16:22:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 6 states have internal predecessors, (841), 0 states have call successors, (0), 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 922 [2021-11-22 16:22:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:22:54,857 INFO L225 Difference]: With dead ends: 211052 [2021-11-22 16:22:54,857 INFO L226 Difference]: Without dead ends: 130112 [2021-11-22 16:22:54,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:22:54,884 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2136 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 7112 mSolverCounterSat, 1194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 8306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1194 IncrementalHoareTripleChecker+Valid, 7112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:22:54,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2136 Valid, 229 Invalid, 8306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1194 Valid, 7112 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-22 16:22:54,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130112 states. [2021-11-22 16:22:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130112 to 81367. [2021-11-22 16:22:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81367 states, 81366 states have (on average 1.0746749256446182) internal successors, (87442), 81366 states have internal predecessors, (87442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81367 states to 81367 states and 87442 transitions. [2021-11-22 16:22:56,102 INFO L78 Accepts]: Start accepts. Automaton has 81367 states and 87442 transitions. Word has length 922 [2021-11-22 16:22:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:56,103 INFO L470 AbstractCegarLoop]: Abstraction has 81367 states and 87442 transitions. [2021-11-22 16:22:56,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 6 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 81367 states and 87442 transitions. [2021-11-22 16:22:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2021-11-22 16:22:56,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:56,154 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 16:22:56,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-22 16:22:56,154 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:56,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1135250746, now seen corresponding path program 1 times [2021-11-22 16:22:56,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:56,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739979756] [2021-11-22 16:22:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:56,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 690 proven. 64 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-22 16:22:56,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:56,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739979756] [2021-11-22 16:22:56,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739979756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:56,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444803780] [2021-11-22 16:22:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:56,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:56,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:56,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:22:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:22:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 690 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-22 16:22:58,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:22:58,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444803780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:22:58,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:22:58,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-22 16:22:58,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494323722] [2021-11-22 16:22:58,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:22:58,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:22:58,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:22:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:22:58,968 INFO L87 Difference]: Start difference. First operand 81367 states and 87442 transitions. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:01,069 INFO L93 Difference]: Finished difference Result 162305 states and 174392 transitions. [2021-11-22 16:23:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:01,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 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 948 [2021-11-22 16:23:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:01,142 INFO L225 Difference]: With dead ends: 162305 [2021-11-22 16:23:01,142 INFO L226 Difference]: Without dead ends: 80939 [2021-11-22 16:23:01,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 951 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:23:01,179 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 107 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:01,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 670 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-22 16:23:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80939 states. [2021-11-22 16:23:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80939 to 77960. [2021-11-22 16:23:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77960 states, 77959 states have (on average 1.0613014533280314) internal successors, (82738), 77959 states have internal predecessors, (82738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77960 states to 77960 states and 82738 transitions. [2021-11-22 16:23:02,356 INFO L78 Accepts]: Start accepts. Automaton has 77960 states and 82738 transitions. Word has length 948 [2021-11-22 16:23:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:02,357 INFO L470 AbstractCegarLoop]: Abstraction has 77960 states and 82738 transitions. [2021-11-22 16:23:02,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 77960 states and 82738 transitions. [2021-11-22 16:23:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2021-11-22 16:23:02,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:02,389 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 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, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:02,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:02,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:02,590 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:23:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1571419451, now seen corresponding path program 1 times [2021-11-22 16:23:02,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:02,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119130448] [2021-11-22 16:23:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:02,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 985 proven. 289 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-22 16:23:03,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:03,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119130448] [2021-11-22 16:23:03,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119130448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:03,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360977252] [2021-11-22 16:23:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:03,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:03,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:03,491 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:03,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:23:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:23:03,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 1051 proven. 223 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-22 16:23:06,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 1067 proven. 207 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-22 16:23:10,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360977252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:10,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:10,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-11-22 16:23:10,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912804689] [2021-11-22 16:23:10,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:10,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 16:23:10,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:10,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 16:23:10,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:23:10,302 INFO L87 Difference]: Start difference. First operand 77960 states and 82738 transitions. Second operand has 16 states, 16 states have (on average 97.5625) internal successors, (1561), 16 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:34,011 INFO L93 Difference]: Finished difference Result 186692 states and 197642 transitions. [2021-11-22 16:23:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-22 16:23:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 97.5625) internal successors, (1561), 16 states have internal predecessors, (1561), 0 states have call successors, (0), 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 958 [2021-11-22 16:23:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:34,292 INFO L225 Difference]: With dead ends: 186692 [2021-11-22 16:23:34,293 INFO L226 Difference]: Without dead ends: 108305 [2021-11-22 16:23:34,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2029 GetRequests, 1960 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1214, Invalid=3756, Unknown=0, NotChecked=0, Total=4970 [2021-11-22 16:23:34,325 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 15534 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 27225 mSolverCounterSat, 3421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15534 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 30646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3421 IncrementalHoareTripleChecker+Valid, 27225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:34,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15534 Valid, 499 Invalid, 30646 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3421 Valid, 27225 Invalid, 0 Unknown, 0 Unchecked, 21.0s Time] [2021-11-22 16:23:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108305 states. [2021-11-22 16:23:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108305 to 94103. [2021-11-22 16:23:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94103 states, 94102 states have (on average 1.0441967227051496) internal successors, (98261), 94102 states have internal predecessors, (98261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94103 states to 94103 states and 98261 transitions. [2021-11-22 16:23:35,564 INFO L78 Accepts]: Start accepts. Automaton has 94103 states and 98261 transitions. Word has length 958 [2021-11-22 16:23:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:35,564 INFO L470 AbstractCegarLoop]: Abstraction has 94103 states and 98261 transitions. [2021-11-22 16:23:35,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 97.5625) internal successors, (1561), 16 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 94103 states and 98261 transitions. [2021-11-22 16:23:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2021-11-22 16:23:35,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:35,609 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:35,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:35,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab51a90e-65d6-4dbc-8873-a335234edb58/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-22 16:23:35,810 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:23:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:35,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1494652019, now seen corresponding path program 1 times [2021-11-22 16:23:35,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:35,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927805905] [2021-11-22 16:23:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:35,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1613 backedges. 929 proven. 0 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-11-22 16:23:36,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:36,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927805905] [2021-11-22 16:23:36,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927805905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:36,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:36,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:23:36,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85830507] [2021-11-22 16:23:36,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:36,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:23:36,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:36,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:23:36,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:23:36,285 INFO L87 Difference]: Start difference. First operand 94103 states and 98261 transitions. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:40,317 INFO L93 Difference]: Finished difference Result 211627 states and 220678 transitions. [2021-11-22 16:23:40,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:23:40,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 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 1039 [2021-11-22 16:23:40,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:40,433 INFO L225 Difference]: With dead ends: 211627 [2021-11-22 16:23:40,433 INFO L226 Difference]: Without dead ends: 116676 [2021-11-22 16:23:40,471 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 [2021-11-22 16:23:40,472 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 655 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:40,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 158 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-22 16:23:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116676 states. [2021-11-22 16:23:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116676 to 105161. [2021-11-22 16:23:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105161 states, 105160 states have (on average 1.0427729174591098) internal successors, (109658), 105160 states have internal predecessors, (109658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105161 states to 105161 states and 109658 transitions. [2021-11-22 16:23:42,454 INFO L78 Accepts]: Start accepts. Automaton has 105161 states and 109658 transitions. Word has length 1039 [2021-11-22 16:23:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:42,455 INFO L470 AbstractCegarLoop]: Abstraction has 105161 states and 109658 transitions. [2021-11-22 16:23:42,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 105161 states and 109658 transitions. [2021-11-22 16:23:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1252 [2021-11-22 16:23:42,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:42,528 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 16:23:42,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-22 16:23:42,529 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:23:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:42,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1214572606, now seen corresponding path program 1 times [2021-11-22 16:23:42,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:42,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319773479] [2021-11-22 16:23:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:42,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2095 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2021-11-22 16:23:43,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:43,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319773479] [2021-11-22 16:23:43,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319773479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:43,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:43,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:23:43,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759731413] [2021-11-22 16:23:43,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:43,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:23:43,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:43,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:23:43,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:23:43,100 INFO L87 Difference]: Start difference. First operand 105161 states and 109658 transitions. Second operand has 3 states, 3 states have (on average 163.0) 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) [2021-11-22 16:23:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:45,650 INFO L93 Difference]: Finished difference Result 219689 states and 228949 transitions. [2021-11-22 16:23:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:23:45,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.0) 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 1251 [2021-11-22 16:23:45,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:45,752 INFO L225 Difference]: With dead ends: 219689 [2021-11-22 16:23:45,752 INFO L226 Difference]: Without dead ends: 114105 [2021-11-22 16:23:45,786 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 [2021-11-22 16:23:45,787 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 376 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:45,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 738 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-22 16:23:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114105 states. [2021-11-22 16:23:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114105 to 105159. [2021-11-22 16:23:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105159 states, 105158 states have (on average 1.0422126704577874) internal successors, (109597), 105158 states have internal predecessors, (109597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105159 states to 105159 states and 109597 transitions. [2021-11-22 16:23:47,288 INFO L78 Accepts]: Start accepts. Automaton has 105159 states and 109597 transitions. Word has length 1251 [2021-11-22 16:23:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:47,289 INFO L470 AbstractCegarLoop]: Abstraction has 105159 states and 109597 transitions. [2021-11-22 16:23:47,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) 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) [2021-11-22 16:23:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 105159 states and 109597 transitions. [2021-11-22 16:23:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2021-11-22 16:23:47,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:47,841 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, 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, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 16:23:47,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-22 16:23:47,842 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:23:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:47,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1642210314, now seen corresponding path program 1 times [2021-11-22 16:23:47,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:47,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987858349] [2021-11-22 16:23:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:47,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3663 backedges. 1408 proven. 0 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2021-11-22 16:23:48,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:48,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987858349] [2021-11-22 16:23:48,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987858349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:23:48,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:23:48,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:23:48,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842007249] [2021-11-22 16:23:48,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:23:48,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:23:48,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:23:48,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:23:48,586 INFO L87 Difference]: Start difference. First operand 105159 states and 109597 transitions. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:52,159 INFO L93 Difference]: Finished difference Result 226503 states and 235863 transitions. [2021-11-22 16:23:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:23:52,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 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 1432 [2021-11-22 16:23:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:52,258 INFO L225 Difference]: With dead ends: 226503 [2021-11-22 16:23:52,258 INFO L226 Difference]: Without dead ends: 120921 [2021-11-22 16:23:52,287 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 [2021-11-22 16:23:52,287 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 1002 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:52,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 164 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-22 16:23:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120921 states.