./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa --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 4eb775f57791ca8f3541a03278dc5eb83ecb8d3533ee7aa5dd1ca1cf24d1fbf4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:38:33,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:38:33,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:38:33,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:38:33,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:38:33,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:38:33,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:38:33,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:38:33,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:38:33,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:38:33,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:38:33,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:38:33,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:38:33,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:38:33,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:38:33,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:38:33,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:38:33,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:38:33,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:38:33,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:38:33,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:38:33,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:38:33,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:38:33,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:38:33,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:38:33,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:38:33,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:38:33,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:38:33,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:38:33,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:38:33,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:38:33,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:38:33,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:38:33,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:38:33,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:38:33,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:38:33,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:38:33,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:38:33,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:38:33,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:38:33,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:38:33,708 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:38:33,730 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:38:33,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:38:33,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:38:33,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:38:33,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:38:33,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:38:33,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:38:33,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:38:33,732 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:38:33,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:38:33,733 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:38:33,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:38:33,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:38:33,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:38:33,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:38:33,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:38:33,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:38:33,734 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:38:33,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:38:33,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:38:33,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:38:33,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:38:33,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:38:33,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:38:33,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:38:33,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:38:33,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:38:33,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:38:33,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:38:33,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:38:33,735 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:38:33,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:38:33,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:38:33,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:38:33,736 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_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eb775f57791ca8f3541a03278dc5eb83ecb8d3533ee7aa5dd1ca1cf24d1fbf4 [2021-12-06 21:38:33,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:38:33,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:38:33,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:38:33,947 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:38:33,948 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:38:33,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c [2021-12-06 21:38:33,989 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/data/950ae6e62/c828fc907fc94f5b86ad0c6d32d705fb/FLAG4a22616f8 [2021-12-06 21:38:34,564 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:38:34,565 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c [2021-12-06 21:38:34,584 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/data/950ae6e62/c828fc907fc94f5b86ad0c6d32d705fb/FLAG4a22616f8 [2021-12-06 21:38:35,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/data/950ae6e62/c828fc907fc94f5b86ad0c6d32d705fb [2021-12-06 21:38:35,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:38:35,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:38:35,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:38:35,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:38:35,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:38:35,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:38:35" (1/1) ... [2021-12-06 21:38:35,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d23bc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:35, skipping insertion in model container [2021-12-06 21:38:35,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:38:35" (1/1) ... [2021-12-06 21:38:35,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:38:35,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:38:35,351 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_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c[6354,6367] [2021-12-06 21:38:35,378 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_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c[9171,9184] [2021-12-06 21:38:35,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:38:35,932 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:38:35,950 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_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c[6354,6367] [2021-12-06 21:38:35,954 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_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c[9171,9184] [2021-12-06 21:38:36,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:38:36,347 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:38:36,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36 WrapperNode [2021-12-06 21:38:36,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:38:36,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:38:36,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:38:36,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:38:36,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,616 INFO L137 Inliner]: procedures = 33, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 4976 [2021-12-06 21:38:36,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:38:36,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:38:36,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:38:36,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:38:36,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:38:36,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:38:36,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:38:36,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:38:36,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (1/1) ... [2021-12-06 21:38:36,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:38:36,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:38:36,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:38:36,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:38:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:38:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:38:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:38:36,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:38:37,054 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:38:37,055 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:38:39,856 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:38:39,869 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:38:39,870 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 21:38:39,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:38:39 BoogieIcfgContainer [2021-12-06 21:38:39,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:38:39,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:38:39,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:38:39,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:38:39,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:38:35" (1/3) ... [2021-12-06 21:38:39,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1c4e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:38:39, skipping insertion in model container [2021-12-06 21:38:39,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:38:36" (2/3) ... [2021-12-06 21:38:39,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1c4e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:38:39, skipping insertion in model container [2021-12-06 21:38:39,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:38:39" (3/3) ... [2021-12-06 21:38:39,878 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label06.c [2021-12-06 21:38:39,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:38:39,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 21:38:39,920 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:38:39,925 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 [2021-12-06 21:38:39,925 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 21:38:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 21:38:39,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:39,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:38:39,957 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash 246970709, now seen corresponding path program 1 times [2021-12-06 21:38:39,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:39,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806602296] [2021-12-06 21:38:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:39,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:40,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:40,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806602296] [2021-12-06 21:38:40,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806602296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:40,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:40,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:38:40,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310385192] [2021-12-06 21:38:40,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:40,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:38:40,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:38:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:38:40,158 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 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 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:42,696 INFO L93 Difference]: Finished difference Result 2489 states and 4794 transitions. [2021-12-06 21:38:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:38:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 21:38:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:42,721 INFO L225 Difference]: With dead ends: 2489 [2021-12-06 21:38:42,721 INFO L226 Difference]: Without dead ends: 1563 [2021-12-06 21:38:42,727 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 [2021-12-06 21:38:42,731 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 908 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:42,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 580 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 21:38:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2021-12-06 21:38:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2021-12-06 21:38:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1561 states have (on average 1.6399743754003844) internal successors, (2560), 1562 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2560 transitions. [2021-12-06 21:38:42,812 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2560 transitions. Word has length 24 [2021-12-06 21:38:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:42,812 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2560 transitions. [2021-12-06 21:38:42,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:42,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2560 transitions. [2021-12-06 21:38:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 21:38:42,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:42,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:38:42,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:38:42,814 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-12-06 21:38:42,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:42,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225234801] [2021-12-06 21:38:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:42,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:42,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:42,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225234801] [2021-12-06 21:38:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225234801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:42,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:42,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:38:42,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013139991] [2021-12-06 21:38:42,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:42,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:38:42,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:38:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:38:42,862 INFO L87 Difference]: Start difference. First operand 1563 states and 2560 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:42,933 INFO L93 Difference]: Finished difference Result 1639 states and 2676 transitions. [2021-12-06 21:38:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:38:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 21:38:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:42,940 INFO L225 Difference]: With dead ends: 1639 [2021-12-06 21:38:42,941 INFO L226 Difference]: Without dead ends: 1599 [2021-12-06 21:38:42,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:38:42,943 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 58 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:42,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 6095 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-12-06 21:38:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1563. [2021-12-06 21:38:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1561 states have (on average 1.6297245355541319) internal successors, (2544), 1562 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2544 transitions. [2021-12-06 21:38:42,976 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2544 transitions. Word has length 26 [2021-12-06 21:38:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:42,977 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2544 transitions. [2021-12-06 21:38:42,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2544 transitions. [2021-12-06 21:38:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 21:38:42,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:42,979 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] [2021-12-06 21:38:42,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:38:42,979 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-12-06 21:38:42,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:42,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270574857] [2021-12-06 21:38:42,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:42,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:43,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270574857] [2021-12-06 21:38:43,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270574857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:43,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:43,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:38:43,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039481478] [2021-12-06 21:38:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:43,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:38:43,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:38:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:38:43,051 INFO L87 Difference]: Start difference. First operand 1563 states and 2544 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:43,076 INFO L93 Difference]: Finished difference Result 1629 states and 2646 transitions. [2021-12-06 21:38:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:38:43,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 21:38:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:43,084 INFO L225 Difference]: With dead ends: 1629 [2021-12-06 21:38:43,084 INFO L226 Difference]: Without dead ends: 1593 [2021-12-06 21:38:43,085 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 [2021-12-06 21:38:43,085 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:43,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-12-06 21:38:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2021-12-06 21:38:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1589 states have (on average 1.6286972938955318) internal successors, (2588), 1590 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2588 transitions. [2021-12-06 21:38:43,119 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2588 transitions. Word has length 41 [2021-12-06 21:38:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:43,119 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 2588 transitions. [2021-12-06 21:38:43,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2588 transitions. [2021-12-06 21:38:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 21:38:43,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:43,121 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] [2021-12-06 21:38:43,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:38:43,121 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:43,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-12-06 21:38:43,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:43,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793952991] [2021-12-06 21:38:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:43,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:43,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:43,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793952991] [2021-12-06 21:38:43,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793952991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:43,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:43,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:38:43,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323762395] [2021-12-06 21:38:43,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:43,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:38:43,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:43,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:38:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:38:43,173 INFO L87 Difference]: Start difference. First operand 1591 states and 2588 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:43,269 INFO L93 Difference]: Finished difference Result 1975 states and 3188 transitions. [2021-12-06 21:38:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:38:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 21:38:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:43,279 INFO L225 Difference]: With dead ends: 1975 [2021-12-06 21:38:43,279 INFO L226 Difference]: Without dead ends: 1911 [2021-12-06 21:38:43,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:38:43,281 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 4709 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:43,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-12-06 21:38:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1653. [2021-12-06 21:38:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1651 states have (on average 1.6250757116898848) internal successors, (2683), 1652 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2683 transitions. [2021-12-06 21:38:43,316 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2683 transitions. Word has length 41 [2021-12-06 21:38:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:43,317 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 2683 transitions. [2021-12-06 21:38:43,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2683 transitions. [2021-12-06 21:38:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 21:38:43,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:43,318 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] [2021-12-06 21:38:43,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:38:43,318 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:43,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-12-06 21:38:43,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:43,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76058599] [2021-12-06 21:38:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:43,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:43,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:43,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76058599] [2021-12-06 21:38:43,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76058599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:43,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:43,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:38:43,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520272843] [2021-12-06 21:38:43,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:43,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:38:43,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:38:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:38:43,357 INFO L87 Difference]: Start difference. First operand 1653 states and 2683 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:43,388 INFO L93 Difference]: Finished difference Result 1840 states and 2970 transitions. [2021-12-06 21:38:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:38:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 21:38:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:43,396 INFO L225 Difference]: With dead ends: 1840 [2021-12-06 21:38:43,396 INFO L226 Difference]: Without dead ends: 1714 [2021-12-06 21:38:43,397 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 [2021-12-06 21:38:43,398 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:43,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-06 21:38:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2021-12-06 21:38:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1710 states have (on average 1.62046783625731) internal successors, (2771), 1711 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2771 transitions. [2021-12-06 21:38:43,434 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2771 transitions. Word has length 43 [2021-12-06 21:38:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:43,434 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 2771 transitions. [2021-12-06 21:38:43,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2771 transitions. [2021-12-06 21:38:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 21:38:43,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:43,435 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] [2021-12-06 21:38:43,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:38:43,436 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:43,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-12-06 21:38:43,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:43,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135237416] [2021-12-06 21:38:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:43,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:43,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:43,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135237416] [2021-12-06 21:38:43,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135237416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:43,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:43,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:38:43,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421100105] [2021-12-06 21:38:43,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:43,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:38:43,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:38:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:38:43,514 INFO L87 Difference]: Start difference. First operand 1712 states and 2771 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:43,588 INFO L93 Difference]: Finished difference Result 1897 states and 3053 transitions. [2021-12-06 21:38:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:38:43,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 21:38:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:43,596 INFO L225 Difference]: With dead ends: 1897 [2021-12-06 21:38:43,596 INFO L226 Difference]: Without dead ends: 1714 [2021-12-06 21:38:43,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:38:43,598 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 4476 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:43,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 1633 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-12-06 21:38:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2021-12-06 21:38:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1710 states have (on average 1.6187134502923977) internal successors, (2768), 1711 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2768 transitions. [2021-12-06 21:38:43,635 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2768 transitions. Word has length 43 [2021-12-06 21:38:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:43,635 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 2768 transitions. [2021-12-06 21:38:43,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2768 transitions. [2021-12-06 21:38:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 21:38:43,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:43,636 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] [2021-12-06 21:38:43,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:38:43,637 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-12-06 21:38:43,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:43,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384907047] [2021-12-06 21:38:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:43,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:43,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:43,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384907047] [2021-12-06 21:38:43,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384907047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:43,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:43,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:38:43,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668277464] [2021-12-06 21:38:43,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:43,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:38:43,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:43,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:38:43,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:38:43,677 INFO L87 Difference]: Start difference. First operand 1712 states and 2768 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:43,730 INFO L93 Difference]: Finished difference Result 2042 states and 3264 transitions. [2021-12-06 21:38:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:38:43,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 21:38:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:43,739 INFO L225 Difference]: With dead ends: 2042 [2021-12-06 21:38:43,739 INFO L226 Difference]: Without dead ends: 1859 [2021-12-06 21:38:43,740 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 [2021-12-06 21:38:43,741 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:43,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:43,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-12-06 21:38:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2021-12-06 21:38:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1855 states have (on average 1.6059299191374663) internal successors, (2979), 1856 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2979 transitions. [2021-12-06 21:38:43,789 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2979 transitions. Word has length 43 [2021-12-06 21:38:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:43,789 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2979 transitions. [2021-12-06 21:38:43,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2979 transitions. [2021-12-06 21:38:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 21:38:43,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:43,790 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] [2021-12-06 21:38:43,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:38:43,791 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-12-06 21:38:43,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:43,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823380916] [2021-12-06 21:38:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:43,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:43,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823380916] [2021-12-06 21:38:43,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823380916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:43,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:43,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:38:43,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141669496] [2021-12-06 21:38:43,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:43,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:38:43,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:43,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:38:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:38:43,820 INFO L87 Difference]: Start difference. First operand 1857 states and 2979 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:43,866 INFO L93 Difference]: Finished difference Result 2441 states and 3837 transitions. [2021-12-06 21:38:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:38:43,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 21:38:43,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:43,876 INFO L225 Difference]: With dead ends: 2441 [2021-12-06 21:38:43,876 INFO L226 Difference]: Without dead ends: 2113 [2021-12-06 21:38:43,877 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 [2021-12-06 21:38:43,878 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:43,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-12-06 21:38:43,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2021-12-06 21:38:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2109 states have (on average 1.5813181602655286) internal successors, (3335), 2110 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3335 transitions. [2021-12-06 21:38:43,938 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3335 transitions. Word has length 43 [2021-12-06 21:38:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:43,938 INFO L470 AbstractCegarLoop]: Abstraction has 2111 states and 3335 transitions. [2021-12-06 21:38:43,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3335 transitions. [2021-12-06 21:38:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 21:38:43,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:43,939 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] [2021-12-06 21:38:43,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:38:43,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-12-06 21:38:43,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686610785] [2021-12-06 21:38:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:43,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:43,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:43,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686610785] [2021-12-06 21:38:43,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686610785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:43,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:43,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:38:43,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270536222] [2021-12-06 21:38:43,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:43,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:38:43,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:38:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:38:43,990 INFO L87 Difference]: Start difference. First operand 2111 states and 3335 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:44,110 INFO L93 Difference]: Finished difference Result 2634 states and 4063 transitions. [2021-12-06 21:38:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:38:44,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-06 21:38:44,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:44,124 INFO L225 Difference]: With dead ends: 2634 [2021-12-06 21:38:44,124 INFO L226 Difference]: Without dead ends: 2632 [2021-12-06 21:38:44,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:38:44,126 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 139 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6078 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:44,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6078 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-12-06 21:38:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2159. [2021-12-06 21:38:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2157 states have (on average 1.5665275846082523) internal successors, (3379), 2158 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3379 transitions. [2021-12-06 21:38:44,195 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3379 transitions. Word has length 44 [2021-12-06 21:38:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:44,195 INFO L470 AbstractCegarLoop]: Abstraction has 2159 states and 3379 transitions. [2021-12-06 21:38:44,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3379 transitions. [2021-12-06 21:38:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 21:38:44,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:44,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:38:44,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 21:38:44,197 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:44,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:44,197 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-12-06 21:38:44,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:44,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818504523] [2021-12-06 21:38:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:44,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:38:44,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:44,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818504523] [2021-12-06 21:38:44,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818504523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:44,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:44,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:38:44,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579379573] [2021-12-06 21:38:44,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:44,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:38:44,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:44,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:38:44,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:38:44,260 INFO L87 Difference]: Start difference. First operand 2159 states and 3379 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:44,381 INFO L93 Difference]: Finished difference Result 4187 states and 6227 transitions. [2021-12-06 21:38:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:38:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 21:38:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:44,396 INFO L225 Difference]: With dead ends: 4187 [2021-12-06 21:38:44,396 INFO L226 Difference]: Without dead ends: 3557 [2021-12-06 21:38:44,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:38:44,399 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 3075 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3075 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:44,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3075 Valid, 3177 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-12-06 21:38:44,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2021-12-06 21:38:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2785 states have (on average 1.5278276481149013) internal successors, (4255), 2786 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4255 transitions. [2021-12-06 21:38:44,492 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4255 transitions. Word has length 64 [2021-12-06 21:38:44,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:44,492 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 4255 transitions. [2021-12-06 21:38:44,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4255 transitions. [2021-12-06 21:38:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 21:38:44,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:44,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:38:44,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 21:38:44,494 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-12-06 21:38:44,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:44,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568802451] [2021-12-06 21:38:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:44,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:38:44,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:44,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568802451] [2021-12-06 21:38:44,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568802451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:44,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:44,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:38:44,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476892366] [2021-12-06 21:38:44,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:44,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:38:44,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:38:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:38:44,537 INFO L87 Difference]: Start difference. First operand 2787 states and 4255 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:44,705 INFO L93 Difference]: Finished difference Result 4815 states and 7103 transitions. [2021-12-06 21:38:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:38:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 21:38:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:44,723 INFO L225 Difference]: With dead ends: 4815 [2021-12-06 21:38:44,723 INFO L226 Difference]: Without dead ends: 4185 [2021-12-06 21:38:44,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:38:44,725 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 3065 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:44,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 3213 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:44,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-12-06 21:38:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2021-12-06 21:38:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3729 states have (on average 1.4907481898632342) internal successors, (5559), 3730 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5559 transitions. [2021-12-06 21:38:44,855 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5559 transitions. Word has length 64 [2021-12-06 21:38:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:44,855 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5559 transitions. [2021-12-06 21:38:44,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5559 transitions. [2021-12-06 21:38:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 21:38:44,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:44,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:38:44,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 21:38:44,857 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-12-06 21:38:44,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:44,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095121694] [2021-12-06 21:38:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:44,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:38:44,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:44,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095121694] [2021-12-06 21:38:44,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095121694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:44,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:44,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:38:44,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379673535] [2021-12-06 21:38:44,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:44,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:38:44,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:38:44,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:38:44,899 INFO L87 Difference]: Start difference. First operand 3731 states and 5559 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:45,039 INFO L93 Difference]: Finished difference Result 5083 states and 7483 transitions. [2021-12-06 21:38:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:38:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 21:38:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:45,052 INFO L225 Difference]: With dead ends: 5083 [2021-12-06 21:38:45,052 INFO L226 Difference]: Without dead ends: 4633 [2021-12-06 21:38:45,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:38:45,054 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 3066 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:45,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3066 Valid, 3181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-12-06 21:38:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2021-12-06 21:38:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.4821642327028968) internal successors, (6191), 4178 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6191 transitions. [2021-12-06 21:38:45,200 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6191 transitions. Word has length 64 [2021-12-06 21:38:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:45,201 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6191 transitions. [2021-12-06 21:38:45,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:45,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6191 transitions. [2021-12-06 21:38:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:38:45,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:45,202 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:38:45,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 21:38:45,203 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-12-06 21:38:45,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:45,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186781023] [2021-12-06 21:38:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:45,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:45,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:45,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186781023] [2021-12-06 21:38:45,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186781023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:45,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:45,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:38:45,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182062495] [2021-12-06 21:38:45,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:45,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:38:45,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:38:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:38:45,235 INFO L87 Difference]: Start difference. First operand 4179 states and 6191 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:45,331 INFO L93 Difference]: Finished difference Result 6831 states and 9893 transitions. [2021-12-06 21:38:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:38:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 [2021-12-06 21:38:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:45,339 INFO L225 Difference]: With dead ends: 6831 [2021-12-06 21:38:45,339 INFO L226 Difference]: Without dead ends: 4181 [2021-12-06 21:38:45,342 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 [2021-12-06 21:38:45,343 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 33 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:45,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-12-06 21:38:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2021-12-06 21:38:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.4701939190806799) internal successors, (6141), 4178 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6141 transitions. [2021-12-06 21:38:45,461 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6141 transitions. Word has length 65 [2021-12-06 21:38:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:45,461 INFO L470 AbstractCegarLoop]: Abstraction has 4179 states and 6141 transitions. [2021-12-06 21:38:45,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6141 transitions. [2021-12-06 21:38:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:38:45,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:45,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:38:45,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:38:45,463 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-12-06 21:38:45,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:45,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76888032] [2021-12-06 21:38:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:45,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:45,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:45,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76888032] [2021-12-06 21:38:45,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76888032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:38:45,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:38:45,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:38:45,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378299920] [2021-12-06 21:38:45,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:38:45,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:38:45,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:38:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:38:45,493 INFO L87 Difference]: Start difference. First operand 4179 states and 6141 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:45,552 INFO L93 Difference]: Finished difference Result 5507 states and 7968 transitions. [2021-12-06 21:38:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:38:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 [2021-12-06 21:38:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:45,557 INFO L225 Difference]: With dead ends: 5507 [2021-12-06 21:38:45,557 INFO L226 Difference]: Without dead ends: 2857 [2021-12-06 21:38:45,561 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 [2021-12-06 21:38:45,561 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:45,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:38:45,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2021-12-06 21:38:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2021-12-06 21:38:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2853 states have (on average 1.504030844724851) internal successors, (4291), 2854 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4291 transitions. [2021-12-06 21:38:45,631 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4291 transitions. Word has length 65 [2021-12-06 21:38:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:45,631 INFO L470 AbstractCegarLoop]: Abstraction has 2855 states and 4291 transitions. [2021-12-06 21:38:45,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4291 transitions. [2021-12-06 21:38:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 21:38:45,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:45,632 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:38:45,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 21:38:45,632 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-12-06 21:38:45,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:45,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245168590] [2021-12-06 21:38:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:45,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:45,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:45,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245168590] [2021-12-06 21:38:45,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245168590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:38:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500822675] [2021-12-06 21:38:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:45,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:38:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:38:45,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:38:45,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:38:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 21:38:45,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:38:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:46,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:38:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:46,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500822675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:38:46,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:38:46,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-06 21:38:46,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892942813] [2021-12-06 21:38:46,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:38:46,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 21:38:46,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:46,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 21:38:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-06 21:38:46,387 INFO L87 Difference]: Start difference. First operand 2855 states and 4291 transitions. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:52,634 INFO L93 Difference]: Finished difference Result 21660 states and 29298 transitions. [2021-12-06 21:38:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-12-06 21:38:52,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 21:38:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:52,678 INFO L225 Difference]: With dead ends: 21660 [2021-12-06 21:38:52,678 INFO L226 Difference]: Without dead ends: 20110 [2021-12-06 21:38:52,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17700 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5018, Invalid=36802, Unknown=0, NotChecked=0, Total=41820 [2021-12-06 21:38:52,694 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 17099 mSDsluCounter, 10025 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17099 SdHoareTripleChecker+Valid, 11607 SdHoareTripleChecker+Invalid, 3458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:52,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17099 Valid, 11607 Invalid, 3458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 21:38:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20110 states. [2021-12-06 21:38:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20110 to 13931. [2021-12-06 21:38:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13931 states, 13929 states have (on average 1.3517122550075382) internal successors, (18828), 13930 states have internal predecessors, (18828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13931 states to 13931 states and 18828 transitions. [2021-12-06 21:38:53,289 INFO L78 Accepts]: Start accepts. Automaton has 13931 states and 18828 transitions. Word has length 65 [2021-12-06 21:38:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:53,289 INFO L470 AbstractCegarLoop]: Abstraction has 13931 states and 18828 transitions. [2021-12-06 21:38:53,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 13931 states and 18828 transitions. [2021-12-06 21:38:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 21:38:53,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:53,290 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:38:53,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:38:53,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 21:38:53,492 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2021-12-06 21:38:53,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:53,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732105742] [2021-12-06 21:38:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:53,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:53,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:53,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732105742] [2021-12-06 21:38:53,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732105742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:38:53,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919534669] [2021-12-06 21:38:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:53,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:38:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:38:53,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:38:53,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:38:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:53,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 21:38:53,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:38:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:54,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:38:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:54,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919534669] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:38:54,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:38:54,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 21:38:54,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607659770] [2021-12-06 21:38:54,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:38:54,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 21:38:54,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 21:38:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:38:54,576 INFO L87 Difference]: Start difference. First operand 13931 states and 18828 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:38:57,120 INFO L93 Difference]: Finished difference Result 56272 states and 73746 transitions. [2021-12-06 21:38:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 21:38:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 21:38:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:38:57,175 INFO L225 Difference]: With dead ends: 56272 [2021-12-06 21:38:57,175 INFO L226 Difference]: Without dead ends: 46210 [2021-12-06 21:38:57,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=1051, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 21:38:57,191 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 9310 mSDsluCounter, 3400 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9310 SdHoareTripleChecker+Valid, 4934 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:38:57,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9310 Valid, 4934 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:38:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46210 states. [2021-12-06 21:38:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46210 to 28584. [2021-12-06 21:38:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28584 states, 28582 states have (on average 1.3267790917360576) internal successors, (37922), 28583 states have internal predecessors, (37922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28584 states to 28584 states and 37922 transitions. [2021-12-06 21:38:58,780 INFO L78 Accepts]: Start accepts. Automaton has 28584 states and 37922 transitions. Word has length 66 [2021-12-06 21:38:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:38:58,780 INFO L470 AbstractCegarLoop]: Abstraction has 28584 states and 37922 transitions. [2021-12-06 21:38:58,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:38:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 28584 states and 37922 transitions. [2021-12-06 21:38:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 21:38:58,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:38:58,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:38:58,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:38:58,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:38:58,983 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:38:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:38:58,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2021-12-06 21:38:58,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:38:58,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659048418] [2021-12-06 21:38:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:58,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:38:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:59,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:38:59,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659048418] [2021-12-06 21:38:59,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659048418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:38:59,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125759606] [2021-12-06 21:38:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:38:59,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:38:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:38:59,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:38:59,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:38:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:38:59,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 21:38:59,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:38:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:59,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:38:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:38:59,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125759606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:38:59,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:38:59,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 21:38:59,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357387387] [2021-12-06 21:38:59,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:38:59,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 21:38:59,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:38:59,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 21:38:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:38:59,926 INFO L87 Difference]: Start difference. First operand 28584 states and 37922 transitions. Second operand has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:08,657 INFO L93 Difference]: Finished difference Result 160017 states and 208897 transitions. [2021-12-06 21:39:08,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 21:39:08,657 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 21:39:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:08,824 INFO L225 Difference]: With dead ends: 160017 [2021-12-06 21:39:08,824 INFO L226 Difference]: Without dead ends: 132962 [2021-12-06 21:39:08,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=720, Invalid=1932, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 21:39:08,863 INFO L933 BasicCegarLoop]: 1523 mSDtfsCounter, 15948 mSDsluCounter, 4912 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15948 SdHoareTripleChecker+Valid, 6435 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:08,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15948 Valid, 6435 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 21:39:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132962 states. [2021-12-06 21:39:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132962 to 64538. [2021-12-06 21:39:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64538 states, 64536 states have (on average 1.3017075740671873) internal successors, (84007), 64537 states have internal predecessors, (84007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64538 states to 64538 states and 84007 transitions. [2021-12-06 21:39:13,471 INFO L78 Accepts]: Start accepts. Automaton has 64538 states and 84007 transitions. Word has length 66 [2021-12-06 21:39:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:13,471 INFO L470 AbstractCegarLoop]: Abstraction has 64538 states and 84007 transitions. [2021-12-06 21:39:13,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.809523809523809) internal successors, (143), 20 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 64538 states and 84007 transitions. [2021-12-06 21:39:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 21:39:13,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:13,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:13,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 21:39:13,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 21:39:13,675 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:39:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2021-12-06 21:39:13,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:13,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388286240] [2021-12-06 21:39:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:13,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:13,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388286240] [2021-12-06 21:39:13,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388286240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:13,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:13,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:39:13,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077431908] [2021-12-06 21:39:13,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:13,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:39:13,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:39:13,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:39:13,736 INFO L87 Difference]: Start difference. First operand 64538 states and 84007 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:15,729 INFO L93 Difference]: Finished difference Result 92591 states and 120257 transitions. [2021-12-06 21:39:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:39:15,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 21:39:15,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:15,765 INFO L225 Difference]: With dead ends: 92591 [2021-12-06 21:39:15,765 INFO L226 Difference]: Without dead ends: 29582 [2021-12-06 21:39:15,805 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 [2021-12-06 21:39:15,805 INFO L933 BasicCegarLoop]: 1525 mSDtfsCounter, 17 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:15,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:39:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29582 states. [2021-12-06 21:39:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29582 to 26281. [2021-12-06 21:39:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26281 states, 26279 states have (on average 1.2903839567715667) internal successors, (33910), 26280 states have internal predecessors, (33910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26281 states to 26281 states and 33910 transitions. [2021-12-06 21:39:17,551 INFO L78 Accepts]: Start accepts. Automaton has 26281 states and 33910 transitions. Word has length 66 [2021-12-06 21:39:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 26281 states and 33910 transitions. [2021-12-06 21:39:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 26281 states and 33910 transitions. [2021-12-06 21:39:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 21:39:17,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:17,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:17,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 21:39:17,553 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:39:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:17,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2021-12-06 21:39:17,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:17,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673346906] [2021-12-06 21:39:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:17,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:39:17,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:17,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673346906] [2021-12-06 21:39:17,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673346906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:17,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:17,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:39:17,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969565562] [2021-12-06 21:39:17,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:17,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:39:17,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:39:17,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:39:17,594 INFO L87 Difference]: Start difference. First operand 26281 states and 33910 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:18,952 INFO L93 Difference]: Finished difference Result 47092 states and 60471 transitions. [2021-12-06 21:39:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:39:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 66 [2021-12-06 21:39:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:18,975 INFO L225 Difference]: With dead ends: 47092 [2021-12-06 21:39:18,975 INFO L226 Difference]: Without dead ends: 22417 [2021-12-06 21:39:18,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:39:18,992 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4541 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4541 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:18,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4541 Valid, 2954 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:39:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22417 states. [2021-12-06 21:39:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22417 to 22417. [2021-12-06 21:39:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22417 states, 22415 states have (on average 1.2725853223287977) internal successors, (28525), 22416 states have internal predecessors, (28525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22417 states to 22417 states and 28525 transitions. [2021-12-06 21:39:20,419 INFO L78 Accepts]: Start accepts. Automaton has 22417 states and 28525 transitions. Word has length 66 [2021-12-06 21:39:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:20,420 INFO L470 AbstractCegarLoop]: Abstraction has 22417 states and 28525 transitions. [2021-12-06 21:39:20,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 22417 states and 28525 transitions. [2021-12-06 21:39:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 21:39:20,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:20,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:20,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 21:39:20,421 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:39:20,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:20,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2021-12-06 21:39:20,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:20,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800937270] [2021-12-06 21:39:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:20,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 21:39:20,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:20,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800937270] [2021-12-06 21:39:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800937270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:20,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:20,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:39:20,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917497203] [2021-12-06 21:39:20,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:39:20,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:39:20,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:39:20,459 INFO L87 Difference]: Start difference. First operand 22417 states and 28525 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:21,604 INFO L93 Difference]: Finished difference Result 37943 states and 47916 transitions. [2021-12-06 21:39:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:39:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 66 [2021-12-06 21:39:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:21,623 INFO L225 Difference]: With dead ends: 37943 [2021-12-06 21:39:21,623 INFO L226 Difference]: Without dead ends: 17168 [2021-12-06 21:39:21,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:39:21,634 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4546 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4546 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:21,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4546 Valid, 2952 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:39:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17168 states. [2021-12-06 21:39:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17168 to 17168. [2021-12-06 21:39:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17168 states, 17166 states have (on average 1.2589420948386345) internal successors, (21611), 17167 states have internal predecessors, (21611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17168 states to 17168 states and 21611 transitions. [2021-12-06 21:39:22,736 INFO L78 Accepts]: Start accepts. Automaton has 17168 states and 21611 transitions. Word has length 66 [2021-12-06 21:39:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:22,737 INFO L470 AbstractCegarLoop]: Abstraction has 17168 states and 21611 transitions. [2021-12-06 21:39:22,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 17168 states and 21611 transitions. [2021-12-06 21:39:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 21:39:22,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:22,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:22,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 21:39:22,738 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:39:22,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:22,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-12-06 21:39:22,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:22,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615654092] [2021-12-06 21:39:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:22,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:39:22,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:22,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615654092] [2021-12-06 21:39:22,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615654092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:39:22,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:39:22,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:39:22,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929256797] [2021-12-06 21:39:22,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:39:22,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:39:22,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:39:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:39:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:39:22,774 INFO L87 Difference]: Start difference. First operand 17168 states and 21611 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:39:23,740 INFO L93 Difference]: Finished difference Result 29362 states and 36636 transitions. [2021-12-06 21:39:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:39:23,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 66 [2021-12-06 21:39:23,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:39:23,753 INFO L225 Difference]: With dead ends: 29362 [2021-12-06 21:39:23,753 INFO L226 Difference]: Without dead ends: 13759 [2021-12-06 21:39:23,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:39:23,762 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4551 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4551 SdHoareTripleChecker+Valid, 2950 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:39:23,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4551 Valid, 2950 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:39:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13759 states. [2021-12-06 21:39:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13759 to 13759. [2021-12-06 21:39:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13757 states have (on average 1.2570327833103148) internal successors, (17293), 13758 states have internal predecessors, (17293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 17293 transitions. [2021-12-06 21:39:24,669 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 17293 transitions. Word has length 66 [2021-12-06 21:39:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:39:24,669 INFO L470 AbstractCegarLoop]: Abstraction has 13759 states and 17293 transitions. [2021-12-06 21:39:24,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:39:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 17293 transitions. [2021-12-06 21:39:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 21:39:24,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:39:24,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:39:24,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 21:39:24,670 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:39:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:39:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2021-12-06 21:39:24,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:39:24,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989527609] [2021-12-06 21:39:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:24,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:39:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:39:24,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:39:24,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989527609] [2021-12-06 21:39:24,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989527609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:39:24,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750549229] [2021-12-06 21:39:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:39:24,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:39:24,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:39:24,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:39:24,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:39:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:39:24,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 21:39:24,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:19,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:41:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:21,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750549229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:41:21,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:41:21,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 17] total 44 [2021-12-06 21:41:21,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669736536] [2021-12-06 21:41:21,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:41:21,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 21:41:21,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:41:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 21:41:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 21:41:21,101 INFO L87 Difference]: Start difference. First operand 13759 states and 17293 transitions. Second operand has 44 states, 44 states have (on average 4.0227272727272725) internal successors, (177), 44 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:41:42,047 INFO L93 Difference]: Finished difference Result 48095 states and 57967 transitions. [2021-12-06 21:41:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-06 21:41:42,047 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.0227272727272725) internal successors, (177), 44 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 21:41:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:41:42,086 INFO L225 Difference]: With dead ends: 48095 [2021-12-06 21:41:42,086 INFO L226 Difference]: Without dead ends: 40099 [2021-12-06 21:41:42,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11535 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=5524, Invalid=27418, Unknown=0, NotChecked=0, Total=32942 [2021-12-06 21:41:42,103 INFO L933 BasicCegarLoop]: 1658 mSDtfsCounter, 11586 mSDsluCounter, 22908 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11586 SdHoareTripleChecker+Valid, 24566 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:41:42,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11586 Valid, 24566 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 21:41:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40099 states. [2021-12-06 21:41:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40099 to 15345. [2021-12-06 21:41:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15345 states, 15343 states have (on average 1.2615524995111778) internal successors, (19356), 15344 states have internal predecessors, (19356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15345 states to 15345 states and 19356 transitions. [2021-12-06 21:41:43,523 INFO L78 Accepts]: Start accepts. Automaton has 15345 states and 19356 transitions. Word has length 67 [2021-12-06 21:41:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:41:43,524 INFO L470 AbstractCegarLoop]: Abstraction has 15345 states and 19356 transitions. [2021-12-06 21:41:43,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.0227272727272725) internal successors, (177), 44 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 15345 states and 19356 transitions. [2021-12-06 21:41:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 21:41:43,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:41:43,525 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:41:43,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:41:43,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:41:43,726 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:41:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:41:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2021-12-06 21:41:43,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:41:43,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345032490] [2021-12-06 21:41:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:43,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:41:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:44,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:41:44,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345032490] [2021-12-06 21:41:44,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345032490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:41:44,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400828396] [2021-12-06 21:41:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:44,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:41:44,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:41:44,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:41:44,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:41:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 21:41:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:44,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:41:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:45,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400828396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:41:45,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:41:45,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2021-12-06 21:41:45,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752489268] [2021-12-06 21:41:45,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:41:45,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 21:41:45,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:41:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 21:41:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-12-06 21:41:45,441 INFO L87 Difference]: Start difference. First operand 15345 states and 19356 transitions. Second operand has 32 states, 32 states have (on average 5.03125) internal successors, (161), 32 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:41:48,983 INFO L93 Difference]: Finished difference Result 31371 states and 39309 transitions. [2021-12-06 21:41:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 21:41:48,984 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.03125) internal successors, (161), 32 states have internal predecessors, (161), 0 states have call successors, (0), 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 68 [2021-12-06 21:41:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:41:49,007 INFO L225 Difference]: With dead ends: 31371 [2021-12-06 21:41:49,007 INFO L226 Difference]: Without dead ends: 24657 [2021-12-06 21:41:49,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 21:41:49,013 INFO L933 BasicCegarLoop]: 1602 mSDtfsCounter, 8381 mSDsluCounter, 19095 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8381 SdHoareTripleChecker+Valid, 20697 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:41:49,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8381 Valid, 20697 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:41:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24657 states. [2021-12-06 21:41:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24657 to 12782. [2021-12-06 21:41:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12782 states, 12780 states have (on average 1.2665884194053207) internal successors, (16187), 12781 states have internal predecessors, (16187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12782 states to 12782 states and 16187 transitions. [2021-12-06 21:41:50,234 INFO L78 Accepts]: Start accepts. Automaton has 12782 states and 16187 transitions. Word has length 68 [2021-12-06 21:41:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:41:50,234 INFO L470 AbstractCegarLoop]: Abstraction has 12782 states and 16187 transitions. [2021-12-06 21:41:50,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.03125) internal successors, (161), 32 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 12782 states and 16187 transitions. [2021-12-06 21:41:50,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 21:41:50,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:41:50,235 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:41:50,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:41:50,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:41:50,437 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:41:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:41:50,438 INFO L85 PathProgramCache]: Analyzing trace with hash -346176118, now seen corresponding path program 1 times [2021-12-06 21:41:50,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:41:50,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082494680] [2021-12-06 21:41:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:50,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:41:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:50,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:41:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082494680] [2021-12-06 21:41:50,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082494680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:41:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018168392] [2021-12-06 21:41:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:50,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:41:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:41:50,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:41:50,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:41:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:50,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:41:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:50,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:41:50,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018168392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:41:50,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:41:50,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-06 21:41:50,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653159224] [2021-12-06 21:41:50,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:41:50,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:41:50,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:41:50,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:41:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:41:50,637 INFO L87 Difference]: Start difference. First operand 12782 states and 16187 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:41:54,293 INFO L93 Difference]: Finished difference Result 15788 states and 21114 transitions. [2021-12-06 21:41:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:41:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-06 21:41:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:41:54,305 INFO L225 Difference]: With dead ends: 15788 [2021-12-06 21:41:54,305 INFO L226 Difference]: Without dead ends: 14284 [2021-12-06 21:41:54,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:41:54,309 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 745 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:41:54,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 1307 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 21:41:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14284 states. [2021-12-06 21:41:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14284 to 14284. [2021-12-06 21:41:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14284 states, 14282 states have (on average 1.2843439294216497) internal successors, (18343), 14283 states have internal predecessors, (18343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14284 states to 14284 states and 18343 transitions. [2021-12-06 21:41:55,518 INFO L78 Accepts]: Start accepts. Automaton has 14284 states and 18343 transitions. Word has length 95 [2021-12-06 21:41:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:41:55,518 INFO L470 AbstractCegarLoop]: Abstraction has 14284 states and 18343 transitions. [2021-12-06 21:41:55,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 14284 states and 18343 transitions. [2021-12-06 21:41:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 21:41:55,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:41:55,519 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:41:55,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 21:41:55,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 21:41:55,721 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:41:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:41:55,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1122964591, now seen corresponding path program 1 times [2021-12-06 21:41:55,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:41:55,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710452821] [2021-12-06 21:41:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:55,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:41:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:55,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:41:55,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710452821] [2021-12-06 21:41:55,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710452821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:41:55,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:41:55,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:41:55,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555748569] [2021-12-06 21:41:55,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:41:55,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:41:55,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:41:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:41:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:41:55,779 INFO L87 Difference]: Start difference. First operand 14284 states and 18343 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:41:59,603 INFO L93 Difference]: Finished difference Result 20294 states and 27582 transitions. [2021-12-06 21:41:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:41:59,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-06 21:41:59,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:41:59,617 INFO L225 Difference]: With dead ends: 20294 [2021-12-06 21:41:59,617 INFO L226 Difference]: Without dead ends: 17288 [2021-12-06 21:41:59,622 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 [2021-12-06 21:41:59,622 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 799 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:41:59,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 574 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 21:41:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17288 states. [2021-12-06 21:42:00,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17288 to 17288. [2021-12-06 21:42:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17288 states, 17286 states have (on average 1.2682517644336457) internal successors, (21923), 17287 states have internal predecessors, (21923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17288 states to 17288 states and 21923 transitions. [2021-12-06 21:42:00,886 INFO L78 Accepts]: Start accepts. Automaton has 17288 states and 21923 transitions. Word has length 98 [2021-12-06 21:42:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:00,886 INFO L470 AbstractCegarLoop]: Abstraction has 17288 states and 21923 transitions. [2021-12-06 21:42:00,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 17288 states and 21923 transitions. [2021-12-06 21:42:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 21:42:00,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:00,889 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:42:00,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 21:42:00,889 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:00,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2121113236, now seen corresponding path program 1 times [2021-12-06 21:42:00,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:00,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920421091] [2021-12-06 21:42:00,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:00,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:42:00,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:00,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920421091] [2021-12-06 21:42:00,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920421091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:00,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:00,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:42:00,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359412073] [2021-12-06 21:42:00,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:00,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:00,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:00,921 INFO L87 Difference]: Start difference. First operand 17288 states and 21923 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:04,412 INFO L93 Difference]: Finished difference Result 29306 states and 38322 transitions. [2021-12-06 21:42:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:04,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-06 21:42:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:04,431 INFO L225 Difference]: With dead ends: 29306 [2021-12-06 21:42:04,431 INFO L226 Difference]: Without dead ends: 23296 [2021-12-06 21:42:04,437 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 [2021-12-06 21:42:04,438 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 848 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:04,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 523 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:42:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23296 states. [2021-12-06 21:42:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23296 to 23296. [2021-12-06 21:42:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23296 states, 23294 states have (on average 1.235425431441573) internal successors, (28778), 23295 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23296 states to 23296 states and 28778 transitions. [2021-12-06 21:42:05,774 INFO L78 Accepts]: Start accepts. Automaton has 23296 states and 28778 transitions. Word has length 99 [2021-12-06 21:42:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:05,775 INFO L470 AbstractCegarLoop]: Abstraction has 23296 states and 28778 transitions. [2021-12-06 21:42:05,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 23296 states and 28778 transitions. [2021-12-06 21:42:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 21:42:05,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:05,776 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 21:42:05,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 21:42:05,776 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:05,777 INFO L85 PathProgramCache]: Analyzing trace with hash -603192797, now seen corresponding path program 1 times [2021-12-06 21:42:05,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439342263] [2021-12-06 21:42:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:05,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:42:05,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439342263] [2021-12-06 21:42:05,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439342263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:05,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:05,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:42:05,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082492610] [2021-12-06 21:42:05,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:05,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:42:05,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:42:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:42:05,839 INFO L87 Difference]: Start difference. First operand 23296 states and 28778 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:11,765 INFO L93 Difference]: Finished difference Result 39820 states and 48897 transitions. [2021-12-06 21:42:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:42:11,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-12-06 21:42:11,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:11,787 INFO L225 Difference]: With dead ends: 39820 [2021-12-06 21:42:11,787 INFO L226 Difference]: Without dead ends: 27802 [2021-12-06 21:42:11,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:42:11,794 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 3058 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 6899 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3058 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 7161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 6899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:11,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3058 Valid, 804 Invalid, 7161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 6899 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-06 21:42:11,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27802 states. [2021-12-06 21:42:13,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27802 to 27051. [2021-12-06 21:42:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27051 states, 27049 states have (on average 1.2109504972457392) internal successors, (32755), 27050 states have internal predecessors, (32755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27051 states to 27051 states and 32755 transitions. [2021-12-06 21:42:13,200 INFO L78 Accepts]: Start accepts. Automaton has 27051 states and 32755 transitions. Word has length 105 [2021-12-06 21:42:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:13,200 INFO L470 AbstractCegarLoop]: Abstraction has 27051 states and 32755 transitions. [2021-12-06 21:42:13,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 27051 states and 32755 transitions. [2021-12-06 21:42:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 21:42:13,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:13,203 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-12-06 21:42:13,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 21:42:13,203 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1940957519, now seen corresponding path program 1 times [2021-12-06 21:42:13,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:13,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009381401] [2021-12-06 21:42:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:13,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:42:13,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:13,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009381401] [2021-12-06 21:42:13,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009381401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:42:13,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243081232] [2021-12-06 21:42:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:13,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:42:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:42:13,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:42:13,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:42:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:13,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 21:42:13,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:42:27,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:42:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:42:30,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243081232] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:42:30,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:42:30,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-12-06 21:42:30,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762100634] [2021-12-06 21:42:30,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:42:30,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 21:42:30,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 21:42:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=873, Unknown=6, NotChecked=0, Total=992 [2021-12-06 21:42:30,104 INFO L87 Difference]: Start difference. First operand 27051 states and 32755 transitions. Second operand has 32 states, 32 states have (on average 9.34375) internal successors, (299), 31 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:27,245 INFO L93 Difference]: Finished difference Result 71347 states and 85365 transitions. [2021-12-06 21:43:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-06 21:43:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 9.34375) internal successors, (299), 31 states have internal predecessors, (299), 0 states have call successors, (0), 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 111 [2021-12-06 21:43:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:27,310 INFO L225 Difference]: With dead ends: 71347 [2021-12-06 21:43:27,311 INFO L226 Difference]: Without dead ends: 64957 [2021-12-06 21:43:27,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4205 ImplicationChecksByTransitivity, 64.0s TimeCoverageRelationStatistics Valid=1934, Invalid=11400, Unknown=6, NotChecked=0, Total=13340 [2021-12-06 21:43:27,326 INFO L933 BasicCegarLoop]: 1569 mSDtfsCounter, 12854 mSDsluCounter, 23426 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12854 SdHoareTripleChecker+Valid, 24995 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:27,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12854 Valid, 24995 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1296 Invalid, 0 Unknown, 415 Unchecked, 1.2s Time] [2021-12-06 21:43:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64957 states. [2021-12-06 21:43:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64957 to 49859. [2021-12-06 21:43:31,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49859 states, 49857 states have (on average 1.2043444250556592) internal successors, (60045), 49858 states have internal predecessors, (60045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49859 states to 49859 states and 60045 transitions. [2021-12-06 21:43:31,796 INFO L78 Accepts]: Start accepts. Automaton has 49859 states and 60045 transitions. Word has length 111 [2021-12-06 21:43:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:31,797 INFO L470 AbstractCegarLoop]: Abstraction has 49859 states and 60045 transitions. [2021-12-06 21:43:31,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.34375) internal successors, (299), 31 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 49859 states and 60045 transitions. [2021-12-06 21:43:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 21:43:31,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:31,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:31,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:43:32,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 21:43:32,001 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash -721276639, now seen corresponding path program 1 times [2021-12-06 21:43:32,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:32,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308709738] [2021-12-06 21:43:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:32,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 25 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:43:32,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:32,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308709738] [2021-12-06 21:43:32,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308709738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:32,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340936987] [2021-12-06 21:43:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:32,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:32,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:32,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:32,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_309de6e5-cdf6-4e8f-89c3-8555d937c1ca/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:43:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:32,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 21:43:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:45:05,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:45:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:45:45,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340936987] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:45:45,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:45:45,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 27, 24] total 59 [2021-12-06 21:45:45,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848736559] [2021-12-06 21:45:45,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:45:45,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 21:45:45,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 21:45:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=3076, Unknown=31, NotChecked=0, Total=3422 [2021-12-06 21:45:45,556 INFO L87 Difference]: Start difference. First operand 49859 states and 60045 transitions. Second operand has 59 states, 59 states have (on average 5.271186440677966) internal successors, (311), 59 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:51:43,063 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 202 DAG size of output: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)