./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de52.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_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/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_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/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_959f8d1c-7195-4cad-9bf2-84f2002b365f/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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:51:09,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:51:09,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:51:09,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:51:09,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:51:09,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:51:09,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:51:09,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:51:09,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:51:09,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:51:09,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:51:09,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:51:09,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:51:09,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:51:09,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:51:09,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:51:09,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:51:09,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:51:09,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:51:09,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:51:09,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:51:09,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:51:09,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:51:09,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:51:09,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:51:09,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:51:09,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:51:09,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:51:09,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:51:09,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:51:09,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:51:09,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:51:09,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:51:09,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:51:09,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:51:09,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:51:09,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:51:09,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:51:09,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:51:09,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:51:09,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:51:09,750 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:51:09,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:51:09,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:51:09,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:51:09,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:51:09,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:51:09,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:51:09,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:51:09,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:51:09,770 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:51:09,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:51:09,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:51:09,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:51:09,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:51:09,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:51:09,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:51:09,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:51:09,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:51:09,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:51:09,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:51:09,771 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:51:09,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:51:09,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:51:09,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:51:09,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:51:09,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:51:09,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:51:09,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:51:09,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:51:09,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:51:09,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:51:09,772 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:51:09,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:51:09,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:51:09,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:51:09,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2021-12-06 17:51:09,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:51:09,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:51:09,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:51:09,952 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:51:09,952 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:51:09,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loops-crafted-1/in-de52.c [2021-12-06 17:51:10,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/data/c5ef3c360/51cd00de608143bd96f0c2d4fed2b3dc/FLAGc4a4aa0c7 [2021-12-06 17:51:10,394 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:51:10,394 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/sv-benchmarks/c/loops-crafted-1/in-de52.c [2021-12-06 17:51:10,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/data/c5ef3c360/51cd00de608143bd96f0c2d4fed2b3dc/FLAGc4a4aa0c7 [2021-12-06 17:51:10,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/data/c5ef3c360/51cd00de608143bd96f0c2d4fed2b3dc [2021-12-06 17:51:10,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:51:10,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:51:10,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:51:10,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:51:10,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:51:10,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5edc4993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10, skipping insertion in model container [2021-12-06 17:51:10,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:51:10,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:51:10,558 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_959f8d1c-7195-4cad-9bf2-84f2002b365f/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2021-12-06 17:51:10,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:51:10,577 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:51:10,589 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_959f8d1c-7195-4cad-9bf2-84f2002b365f/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2021-12-06 17:51:10,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:51:10,604 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:51:10,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10 WrapperNode [2021-12-06 17:51:10,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:51:10,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:51:10,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:51:10,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:51:10,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,631 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2021-12-06 17:51:10,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:51:10,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:51:10,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:51:10,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:51:10,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:51:10,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:51:10,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:51:10,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:51:10,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (1/1) ... [2021-12-06 17:51:10,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:51:10,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:10,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:51:10,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:51:10,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:51:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:51:10,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:51:10,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:51:10,756 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:51:10,758 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:51:10,844 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:51:10,849 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:51:10,849 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-06 17:51:10,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:51:10 BoogieIcfgContainer [2021-12-06 17:51:10,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:51:10,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:51:10,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:51:10,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:51:10,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:51:10" (1/3) ... [2021-12-06 17:51:10,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c94ca68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:51:10, skipping insertion in model container [2021-12-06 17:51:10,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:51:10" (2/3) ... [2021-12-06 17:51:10,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c94ca68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:51:10, skipping insertion in model container [2021-12-06 17:51:10,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:51:10" (3/3) ... [2021-12-06 17:51:10,857 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.c [2021-12-06 17:51:10,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:51:10,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:51:10,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:51:10,907 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 17:51:10,907 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:51:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:51:10,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:10,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:10,923 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:10,927 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2021-12-06 17:51:10,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:10,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154984446] [2021-12-06 17:51:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:10,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:11,044 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 17:51:11,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:11,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154984446] [2021-12-06 17:51:11,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154984446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:11,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:11,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:51:11,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897094753] [2021-12-06 17:51:11,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:11,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:51:11,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:11,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:51:11,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:51:11,085 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 17:51:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:11,100 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2021-12-06 17:51:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:51:11,102 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-06 17:51:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:11,110 INFO L225 Difference]: With dead ends: 29 [2021-12-06 17:51:11,110 INFO L226 Difference]: Without dead ends: 12 [2021-12-06 17:51:11,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:51:11,118 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:11,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-06 17:51:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-06 17:51:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 17:51:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-12-06 17:51:11,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2021-12-06 17:51:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:11,147 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-12-06 17:51:11,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 17:51:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-12-06 17:51:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:51:11,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:11,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:11,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:51:11,149 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2021-12-06 17:51:11,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:11,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145144020] [2021-12-06 17:51:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:11,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:11,227 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 17:51:11,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:11,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145144020] [2021-12-06 17:51:11,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145144020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:11,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:11,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:51:11,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120294182] [2021-12-06 17:51:11,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:11,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:51:11,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:11,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:51:11,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:51:11,232 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 17:51:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:11,268 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2021-12-06 17:51:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:51:11,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-06 17:51:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:11,270 INFO L225 Difference]: With dead ends: 27 [2021-12-06 17:51:11,270 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 17:51:11,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:51:11,271 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 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 17:51:11,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 17:51:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-06 17:51:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:11,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2021-12-06 17:51:11,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2021-12-06 17:51:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:11,276 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2021-12-06 17:51:11,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 17:51:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2021-12-06 17:51:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:51:11,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:11,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:11,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:51:11,278 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:11,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2021-12-06 17:51:11,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:11,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772930905] [2021-12-06 17:51:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:11,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:11,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:11,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772930905] [2021-12-06 17:51:11,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772930905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:11,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:11,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:51:11,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912052667] [2021-12-06 17:51:11,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:11,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:51:11,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:11,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:51:11,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:51:11,311 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:11,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:11,323 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-12-06 17:51:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:51:11,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 17:51:11,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:11,324 INFO L225 Difference]: With dead ends: 28 [2021-12-06 17:51:11,324 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 17:51:11,325 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 17:51:11,326 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:11,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 17:51:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-06 17:51:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2021-12-06 17:51:11,331 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2021-12-06 17:51:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:11,331 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2021-12-06 17:51:11,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2021-12-06 17:51:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:51:11,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:11,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:11,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:51:11,332 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:11,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2021-12-06 17:51:11,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:11,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956206629] [2021-12-06 17:51:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:11,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:11,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:11,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956206629] [2021-12-06 17:51:11,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956206629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:11,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:11,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:51:11,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854213296] [2021-12-06 17:51:11,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:11,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:51:11,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:51:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:51:11,359 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:11,370 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2021-12-06 17:51:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:51:11,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 17:51:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:11,371 INFO L225 Difference]: With dead ends: 37 [2021-12-06 17:51:11,371 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 17:51:11,371 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 17:51:11,373 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:11,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:11,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 17:51:11,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-06 17:51:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2021-12-06 17:51:11,382 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 12 [2021-12-06 17:51:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:11,382 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2021-12-06 17:51:11,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2021-12-06 17:51:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 17:51:11,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:11,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:11,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:51:11,383 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1947191488, now seen corresponding path program 1 times [2021-12-06 17:51:11,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:11,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933215299] [2021-12-06 17:51:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:11,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:51:11,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933215299] [2021-12-06 17:51:11,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933215299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:11,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:11,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:51:11,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646562811] [2021-12-06 17:51:11,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:11,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:51:11,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:11,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:51:11,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:51:11,417 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 17:51:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:11,436 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-12-06 17:51:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:51:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 17:51:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:11,437 INFO L225 Difference]: With dead ends: 34 [2021-12-06 17:51:11,437 INFO L226 Difference]: Without dead ends: 23 [2021-12-06 17:51:11,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:51:11,438 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:11,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-06 17:51:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-06 17:51:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 17:51:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2021-12-06 17:51:11,442 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2021-12-06 17:51:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:11,442 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2021-12-06 17:51:11,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 17:51:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2021-12-06 17:51:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:51:11,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:11,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:11,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:51:11,443 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 696660059, now seen corresponding path program 1 times [2021-12-06 17:51:11,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:11,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133785131] [2021-12-06 17:51:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:11,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:11,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133785131] [2021-12-06 17:51:11,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133785131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418318994] [2021-12-06 17:51:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:11,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:11,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:11,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:11,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:51:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:51:11,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:11,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:11,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418318994] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:11,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:51:11,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2021-12-06 17:51:11,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169451365] [2021-12-06 17:51:11,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:11,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:51:11,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:51:11,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:51:11,643 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 17:51:11,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:11,663 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-12-06 17:51:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:51:11,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-12-06 17:51:11,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:11,664 INFO L225 Difference]: With dead ends: 29 [2021-12-06 17:51:11,664 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 17:51:11,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:51:11,666 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:11,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 17:51:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-06 17:51:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 17:51:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-12-06 17:51:11,671 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2021-12-06 17:51:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:11,671 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-12-06 17:51:11,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 17:51:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-12-06 17:51:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:51:11,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:11,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:11,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:11,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:11,874 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:11,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash 240273083, now seen corresponding path program 1 times [2021-12-06 17:51:11,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:11,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556247446] [2021-12-06 17:51:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:11,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:12,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:12,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556247446] [2021-12-06 17:51:12,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556247446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:12,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633738631] [2021-12-06 17:51:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:12,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:12,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:12,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:12,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:51:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:51:12,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:51:12,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:12,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633738631] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:12,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:51:12,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2021-12-06 17:51:12,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096903635] [2021-12-06 17:51:12,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:12,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:51:12,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:12,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:51:12,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:51:12,154 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 17:51:12,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:12,171 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-12-06 17:51:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:51:12,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-12-06 17:51:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:12,172 INFO L225 Difference]: With dead ends: 24 [2021-12-06 17:51:12,172 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 17:51:12,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:51:12,172 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:12,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 17:51:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 17:51:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 17:51:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-12-06 17:51:12,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 14 [2021-12-06 17:51:12,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:12,175 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-12-06 17:51:12,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 17:51:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-12-06 17:51:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:51:12,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:12,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:12,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:51:12,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 17:51:12,378 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash -601796193, now seen corresponding path program 1 times [2021-12-06 17:51:12,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:12,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122504484] [2021-12-06 17:51:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:12,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:12,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:12,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122504484] [2021-12-06 17:51:12,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122504484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599047112] [2021-12-06 17:51:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:12,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:12,538 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:12,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:51:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:12,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:51:12,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:12,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:12,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599047112] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:12,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:12,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-12-06 17:51:12,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499826098] [2021-12-06 17:51:12,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:12,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:51:12,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:12,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:51:12,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:51:12,683 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 17:51:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:12,704 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-12-06 17:51:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:51:12,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 17:51:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:12,706 INFO L225 Difference]: With dead ends: 27 [2021-12-06 17:51:12,706 INFO L226 Difference]: Without dead ends: 21 [2021-12-06 17:51:12,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:51:12,707 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:12,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:12,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-06 17:51:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-06 17:51:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 17:51:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-12-06 17:51:12,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 15 [2021-12-06 17:51:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:12,712 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-12-06 17:51:12,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 17:51:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2021-12-06 17:51:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:51:12,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:12,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:12,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:51:12,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:12,914 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash -556543664, now seen corresponding path program 1 times [2021-12-06 17:51:12,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:12,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359850568] [2021-12-06 17:51:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:12,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:51:12,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:12,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359850568] [2021-12-06 17:51:12,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359850568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:12,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582681074] [2021-12-06 17:51:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:12,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:12,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:12,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:12,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:51:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:13,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:51:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:13,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:13,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582681074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:13,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:13,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 4] total 12 [2021-12-06 17:51:13,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117051266] [2021-12-06 17:51:13,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:13,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:51:13,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:13,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:51:13,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:51:13,144 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:13,216 INFO L93 Difference]: Finished difference Result 63 states and 88 transitions. [2021-12-06 17:51:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:51:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 17:51:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:13,218 INFO L225 Difference]: With dead ends: 63 [2021-12-06 17:51:13,218 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 17:51:13,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:51:13,219 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:13,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 46 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:51:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 17:51:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-12-06 17:51:13,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:13,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-12-06 17:51:13,224 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 15 [2021-12-06 17:51:13,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:13,224 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-12-06 17:51:13,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:13,224 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-12-06 17:51:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:51:13,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:13,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:13,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:51:13,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:13,426 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash -71318983, now seen corresponding path program 1 times [2021-12-06 17:51:13,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:13,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035962263] [2021-12-06 17:51:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:13,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:51:13,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:13,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035962263] [2021-12-06 17:51:13,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035962263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:13,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187488866] [2021-12-06 17:51:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:13,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:13,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:13,478 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:13,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:51:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:51:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:51:13,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:51:13,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187488866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:13,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:13,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2021-12-06 17:51:13,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386163205] [2021-12-06 17:51:13,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:13,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:51:13,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:13,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:51:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:51:13,588 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 17:51:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:13,635 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-12-06 17:51:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:51:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 17:51:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:13,636 INFO L225 Difference]: With dead ends: 55 [2021-12-06 17:51:13,636 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 17:51:13,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:51:13,637 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:13,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 17:51:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-12-06 17:51:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 17:51:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-12-06 17:51:13,643 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 16 [2021-12-06 17:51:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:13,643 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-12-06 17:51:13,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 17:51:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2021-12-06 17:51:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:51:13,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:13,644 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:13,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:51:13,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:13,845 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:13,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:13,846 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 2 times [2021-12-06 17:51:13,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:13,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077900360] [2021-12-06 17:51:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:13,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:51:13,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:13,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077900360] [2021-12-06 17:51:13,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077900360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:13,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762979892] [2021-12-06 17:51:13,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:51:13,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:13,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:13,918 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:13,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:51:13,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:51:13,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:13,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:51:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:51:13,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:51:14,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762979892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:14,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:14,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-12-06 17:51:14,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667212455] [2021-12-06 17:51:14,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:14,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:51:14,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:51:14,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:51:14,007 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 17:51:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:14,021 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-12-06 17:51:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:51:14,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-06 17:51:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:14,022 INFO L225 Difference]: With dead ends: 51 [2021-12-06 17:51:14,022 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 17:51:14,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:51:14,023 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:14,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 17:51:14,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-06 17:51:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2021-12-06 17:51:14,026 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 17 [2021-12-06 17:51:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:14,026 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2021-12-06 17:51:14,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 17:51:14,027 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2021-12-06 17:51:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:51:14,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:14,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:14,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:14,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:14,229 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:14,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:14,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2118522240, now seen corresponding path program 2 times [2021-12-06 17:51:14,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:14,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711514217] [2021-12-06 17:51:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:14,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:51:14,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:14,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711514217] [2021-12-06 17:51:14,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711514217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:14,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358625365] [2021-12-06 17:51:14,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:51:14,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:14,378 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:14,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:51:14,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:51:14,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:14,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:51:14,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:51:14,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:51:14,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358625365] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:14,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:14,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2021-12-06 17:51:14,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106503071] [2021-12-06 17:51:14,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:14,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:51:14,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:51:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:51:14,539 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:51:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:14,739 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2021-12-06 17:51:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:51:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 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 17 [2021-12-06 17:51:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:14,740 INFO L225 Difference]: With dead ends: 92 [2021-12-06 17:51:14,740 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 17:51:14,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:51:14,741 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:14,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 122 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:51:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 17:51:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 44. [2021-12-06 17:51:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 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 17:51:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2021-12-06 17:51:14,747 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 17 [2021-12-06 17:51:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:14,748 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2021-12-06 17:51:14,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:51:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2021-12-06 17:51:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:51:14,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:14,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:14,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:51:14,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:14,950 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:14,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:14,950 INFO L85 PathProgramCache]: Analyzing trace with hash 750125673, now seen corresponding path program 2 times [2021-12-06 17:51:14,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:14,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394653727] [2021-12-06 17:51:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:14,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:15,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:15,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394653727] [2021-12-06 17:51:15,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394653727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:15,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712725174] [2021-12-06 17:51:15,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:51:15,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:15,059 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:15,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:51:15,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:51:15,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:51:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:51:15,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:51:15,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712725174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:15,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:15,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2021-12-06 17:51:15,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297297582] [2021-12-06 17:51:15,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:15,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:51:15,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:51:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:51:15,163 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:15,456 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2021-12-06 17:51:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 17:51:15,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 17:51:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:15,457 INFO L225 Difference]: With dead ends: 77 [2021-12-06 17:51:15,457 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 17:51:15,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-12-06 17:51:15,459 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:15,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:51:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 17:51:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-12-06 17:51:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2021-12-06 17:51:15,465 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 18 [2021-12-06 17:51:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2021-12-06 17:51:15,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2021-12-06 17:51:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 17:51:15,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:15,466 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:15,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:51:15,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 17:51:15,667 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1913455152, now seen corresponding path program 3 times [2021-12-06 17:51:15,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37481066] [2021-12-06 17:51:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:15,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:51:15,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:15,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37481066] [2021-12-06 17:51:15,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37481066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:15,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039180798] [2021-12-06 17:51:15,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:51:15,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:15,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:15,734 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:15,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:51:15,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 17:51:15,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:15,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:51:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:51:15,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:51:15,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039180798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:15,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:15,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 18 [2021-12-06 17:51:15,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131713939] [2021-12-06 17:51:15,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:15,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:51:15,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:51:15,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:51:15,971 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:16,929 INFO L93 Difference]: Finished difference Result 137 states and 189 transitions. [2021-12-06 17:51:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 17:51:16,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 17:51:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:16,930 INFO L225 Difference]: With dead ends: 137 [2021-12-06 17:51:16,930 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 17:51:16,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 17:51:16,932 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:16,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 178 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:51:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 17:51:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2021-12-06 17:51:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 67 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 17:51:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2021-12-06 17:51:16,937 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 19 [2021-12-06 17:51:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:16,937 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2021-12-06 17:51:16,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2021-12-06 17:51:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:51:16,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:16,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:16,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:51:17,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 17:51:17,139 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 4 times [2021-12-06 17:51:17,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:17,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114022043] [2021-12-06 17:51:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:17,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:51:17,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:17,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114022043] [2021-12-06 17:51:17,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114022043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:17,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100953128] [2021-12-06 17:51:17,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:51:17,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:17,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:17,194 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:17,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:51:17,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:51:17,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:17,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:51:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:51:17,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:51:17,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100953128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:17,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:17,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2021-12-06 17:51:17,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645079747] [2021-12-06 17:51:17,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:17,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:51:17,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:51:17,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:51:17,290 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:17,336 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2021-12-06 17:51:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:51:17,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 17:51:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:17,337 INFO L225 Difference]: With dead ends: 82 [2021-12-06 17:51:17,337 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 17:51:17,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:51:17,338 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:17,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 17:51:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-06 17:51:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 17:51:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2021-12-06 17:51:17,343 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 20 [2021-12-06 17:51:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:17,343 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2021-12-06 17:51:17,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2021-12-06 17:51:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:51:17,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:17,344 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:17,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:51:17,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 17:51:17,545 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:17,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1336926662, now seen corresponding path program 3 times [2021-12-06 17:51:17,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:17,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516804230] [2021-12-06 17:51:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:17,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:51:17,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:17,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516804230] [2021-12-06 17:51:17,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516804230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:17,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122582413] [2021-12-06 17:51:17,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:51:17,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:17,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:17,701 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:17,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:51:17,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:51:17,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:17,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:51:17,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:51:17,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:51:17,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122582413] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:17,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:17,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2021-12-06 17:51:17,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604071364] [2021-12-06 17:51:17,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:17,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:51:17,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:17,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:51:17,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:51:17,886 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:18,589 INFO L93 Difference]: Finished difference Result 164 states and 228 transitions. [2021-12-06 17:51:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 17:51:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 17:51:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:18,590 INFO L225 Difference]: With dead ends: 164 [2021-12-06 17:51:18,590 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 17:51:18,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:51:18,591 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:18,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 157 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:51:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 17:51:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2021-12-06 17:51:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.3478260869565217) internal successors, (124), 92 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 17:51:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2021-12-06 17:51:18,597 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 124 transitions. Word has length 20 [2021-12-06 17:51:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:18,598 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 124 transitions. [2021-12-06 17:51:18,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 124 transitions. [2021-12-06 17:51:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 17:51:18,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:18,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:18,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:18,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 17:51:18,799 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:18,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1458344336, now seen corresponding path program 3 times [2021-12-06 17:51:18,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:18,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836710036] [2021-12-06 17:51:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:18,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:51:18,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836710036] [2021-12-06 17:51:18,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836710036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739181346] [2021-12-06 17:51:18,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:51:18,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:18,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:18,894 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:18,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:51:18,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:51:18,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:51:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:51:18,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:51:19,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739181346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:19,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:19,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2021-12-06 17:51:19,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779897875] [2021-12-06 17:51:19,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:19,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:51:19,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:19,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:51:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:51:19,012 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 17:51:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:19,816 INFO L93 Difference]: Finished difference Result 133 states and 181 transitions. [2021-12-06 17:51:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 17:51:19,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 17:51:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:19,817 INFO L225 Difference]: With dead ends: 133 [2021-12-06 17:51:19,817 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 17:51:19,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 17:51:19,820 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 76 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:19,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 46 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:51:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 17:51:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2021-12-06 17:51:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 81 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 17:51:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-12-06 17:51:19,827 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 21 [2021-12-06 17:51:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:19,827 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-12-06 17:51:19,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 17:51:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-12-06 17:51:19,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 17:51:19,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:19,828 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:19,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 17:51:20,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 17:51:20,029 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:20,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:20,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1455648122, now seen corresponding path program 5 times [2021-12-06 17:51:20,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:20,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609153071] [2021-12-06 17:51:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:20,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:51:20,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:20,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609153071] [2021-12-06 17:51:20,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609153071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:20,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256599688] [2021-12-06 17:51:20,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:51:20,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:20,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:20,119 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:20,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 17:51:20,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 17:51:20,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:20,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:51:20,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:51:20,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:51:20,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256599688] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:20,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:20,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2021-12-06 17:51:20,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131740250] [2021-12-06 17:51:20,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:20,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:51:20,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:51:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:51:20,228 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 17:51:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:20,257 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2021-12-06 17:51:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:51:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 17:51:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:20,258 INFO L225 Difference]: With dead ends: 104 [2021-12-06 17:51:20,258 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 17:51:20,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:51:20,259 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:20,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 17:51:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-06 17:51:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 79 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 17:51:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2021-12-06 17:51:20,265 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 22 [2021-12-06 17:51:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:20,265 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2021-12-06 17:51:20,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 17:51:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2021-12-06 17:51:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 17:51:20,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:20,266 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:20,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 17:51:20,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:20,467 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 181444187, now seen corresponding path program 6 times [2021-12-06 17:51:20,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:20,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123031500] [2021-12-06 17:51:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:20,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:51:20,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:20,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123031500] [2021-12-06 17:51:20,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123031500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:20,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011072724] [2021-12-06 17:51:20,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:51:20,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:20,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:20,574 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:20,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 17:51:20,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 17:51:20,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:20,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:51:20,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 17:51:20,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 17:51:20,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011072724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:20,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:20,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 18 [2021-12-06 17:51:20,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115066959] [2021-12-06 17:51:20,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:20,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:51:20,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:51:20,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:51:20,722 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:21,140 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2021-12-06 17:51:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:51:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 17:51:21,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:21,141 INFO L225 Difference]: With dead ends: 206 [2021-12-06 17:51:21,141 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 17:51:21,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 17:51:21,143 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 89 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:21,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 333 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:51:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 17:51:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 83. [2021-12-06 17:51:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 17:51:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2021-12-06 17:51:21,149 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 22 [2021-12-06 17:51:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:21,149 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2021-12-06 17:51:21,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2021-12-06 17:51:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 17:51:21,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:21,149 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:21,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:21,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:21,351 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash 534298912, now seen corresponding path program 4 times [2021-12-06 17:51:21,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:21,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365039110] [2021-12-06 17:51:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:21,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:51:21,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:21,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365039110] [2021-12-06 17:51:21,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365039110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:21,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419480222] [2021-12-06 17:51:21,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:51:21,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:21,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:21,453 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:21,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 17:51:21,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:51:21,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:21,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 17:51:21,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:51:21,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:51:21,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419480222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:21,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:21,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-06 17:51:21,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290016377] [2021-12-06 17:51:21,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:21,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 17:51:21,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 17:51:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:51:21,653 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:33,081 INFO L93 Difference]: Finished difference Result 511 states and 619 transitions. [2021-12-06 17:51:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-06 17:51:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 17:51:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:33,084 INFO L225 Difference]: With dead ends: 511 [2021-12-06 17:51:33,084 INFO L226 Difference]: Without dead ends: 473 [2021-12-06 17:51:33,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9278 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=4632, Invalid=17718, Unknown=0, NotChecked=0, Total=22350 [2021-12-06 17:51:33,090 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 726 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:33,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 399 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:51:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-12-06 17:51:33,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 103. [2021-12-06 17:51:33,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 102 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 17:51:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2021-12-06 17:51:33,098 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 23 [2021-12-06 17:51:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:33,098 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2021-12-06 17:51:33,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2021-12-06 17:51:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:51:33,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:33,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:33,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 17:51:33,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:33,300 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash -146134359, now seen corresponding path program 4 times [2021-12-06 17:51:33,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:33,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158865213] [2021-12-06 17:51:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:33,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:33,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:33,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158865213] [2021-12-06 17:51:33,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158865213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:33,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619796666] [2021-12-06 17:51:33,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:51:33,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:33,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:33,428 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:33,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 17:51:33,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:51:33,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:51:33,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:51:33,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:51:33,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619796666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:33,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:33,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2021-12-06 17:51:33,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154120818] [2021-12-06 17:51:33,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:33,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:51:33,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:51:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:51:33,555 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:51:35,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:35,868 INFO L93 Difference]: Finished difference Result 180 states and 245 transitions. [2021-12-06 17:51:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 17:51:35,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 24 [2021-12-06 17:51:35,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:35,869 INFO L225 Difference]: With dead ends: 180 [2021-12-06 17:51:35,869 INFO L226 Difference]: Without dead ends: 162 [2021-12-06 17:51:35,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=572, Invalid=4398, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 17:51:35,871 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:35,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 114 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:51:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-06 17:51:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 118. [2021-12-06 17:51:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2991452991452992) internal successors, (152), 117 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 17:51:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 152 transitions. [2021-12-06 17:51:35,878 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 152 transitions. Word has length 24 [2021-12-06 17:51:35,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:35,878 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 152 transitions. [2021-12-06 17:51:35,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:51:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 152 transitions. [2021-12-06 17:51:35,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:51:35,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:35,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:35,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 17:51:36,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:36,081 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:36,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:36,082 INFO L85 PathProgramCache]: Analyzing trace with hash -703235457, now seen corresponding path program 7 times [2021-12-06 17:51:36,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:36,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686764122] [2021-12-06 17:51:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:36,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:51:36,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:36,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686764122] [2021-12-06 17:51:36,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686764122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:36,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091451998] [2021-12-06 17:51:36,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:51:36,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:36,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:36,138 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:36,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 17:51:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:36,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:51:36,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:51:36,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:51:36,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091451998] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:36,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:36,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-12-06 17:51:36,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164780569] [2021-12-06 17:51:36,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:36,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:51:36,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:36,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:51:36,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:51:36,228 INFO L87 Difference]: Start difference. First operand 118 states and 152 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:36,295 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2021-12-06 17:51:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:51:36,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 17:51:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:36,297 INFO L225 Difference]: With dead ends: 131 [2021-12-06 17:51:36,297 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 17:51:36,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:51:36,298 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:36,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 17:51:36,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-12-06 17:51:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 118 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 17:51:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 152 transitions. [2021-12-06 17:51:36,305 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 152 transitions. Word has length 25 [2021-12-06 17:51:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:36,306 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 152 transitions. [2021-12-06 17:51:36,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 152 transitions. [2021-12-06 17:51:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:51:36,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:36,306 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:36,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:36,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 17:51:36,508 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:36,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1578862924, now seen corresponding path program 5 times [2021-12-06 17:51:36,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:36,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099798331] [2021-12-06 17:51:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:36,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:51:36,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099798331] [2021-12-06 17:51:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099798331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097872598] [2021-12-06 17:51:36,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:51:36,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:36,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:36,659 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:36,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 17:51:36,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 17:51:36,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:36,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 17:51:36,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:51:36,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:51:37,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097872598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:37,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:37,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 23 [2021-12-06 17:51:37,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503050833] [2021-12-06 17:51:37,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:37,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 17:51:37,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:37,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 17:51:37,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:51:37,016 INFO L87 Difference]: Start difference. First operand 119 states and 152 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:43,193 INFO L93 Difference]: Finished difference Result 725 states and 867 transitions. [2021-12-06 17:51:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-06 17:51:43,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 17:51:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:43,196 INFO L225 Difference]: With dead ends: 725 [2021-12-06 17:51:43,197 INFO L226 Difference]: Without dead ends: 697 [2021-12-06 17:51:43,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2037, Invalid=5445, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 17:51:43,205 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 848 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:43,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 601 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:51:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-12-06 17:51:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 157. [2021-12-06 17:51:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.294871794871795) internal successors, (202), 156 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 17:51:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2021-12-06 17:51:43,223 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 26 [2021-12-06 17:51:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:43,223 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2021-12-06 17:51:43,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2021-12-06 17:51:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:51:43,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:43,224 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:43,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:43,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 17:51:43,425 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:43,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:43,426 INFO L85 PathProgramCache]: Analyzing trace with hash -318710337, now seen corresponding path program 8 times [2021-12-06 17:51:43,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:43,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697181633] [2021-12-06 17:51:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:43,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:51:43,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697181633] [2021-12-06 17:51:43,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697181633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887576066] [2021-12-06 17:51:43,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:51:43,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:43,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:43,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:43,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 17:51:43,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:51:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:43,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:51:43,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:51:43,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:51:43,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887576066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:43,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:43,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2021-12-06 17:51:43,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139907263] [2021-12-06 17:51:43,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:43,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:51:43,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:51:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:51:43,635 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 17:51:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:43,691 INFO L93 Difference]: Finished difference Result 191 states and 247 transitions. [2021-12-06 17:51:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:51:43,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 27 [2021-12-06 17:51:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:43,692 INFO L225 Difference]: With dead ends: 191 [2021-12-06 17:51:43,693 INFO L226 Difference]: Without dead ends: 167 [2021-12-06 17:51:43,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:51:43,693 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:43,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 62 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:43,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-06 17:51:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 144. [2021-12-06 17:51:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.3076923076923077) internal successors, (187), 143 states have internal predecessors, (187), 0 states have call successors, (0), 0 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 17:51:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 187 transitions. [2021-12-06 17:51:43,708 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 187 transitions. Word has length 27 [2021-12-06 17:51:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:43,708 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 187 transitions. [2021-12-06 17:51:43,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 17:51:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 187 transitions. [2021-12-06 17:51:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:51:43,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:43,709 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:43,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 17:51:43,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 17:51:43,910 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash -831872481, now seen corresponding path program 5 times [2021-12-06 17:51:43,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:43,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931333375] [2021-12-06 17:51:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:43,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:44,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:44,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931333375] [2021-12-06 17:51:44,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931333375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:44,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731720545] [2021-12-06 17:51:44,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:51:44,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:44,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:44,048 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:44,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 17:51:44,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 17:51:44,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:44,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 17:51:44,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:51:44,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:51:44,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731720545] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:44,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:44,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2021-12-06 17:51:44,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671078208] [2021-12-06 17:51:44,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:44,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:51:44,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:44,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:51:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:51:44,398 INFO L87 Difference]: Start difference. First operand 144 states and 187 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 17:51:50,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:50,213 INFO L93 Difference]: Finished difference Result 263 states and 357 transitions. [2021-12-06 17:51:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-06 17:51:50,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 17:51:50,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:50,214 INFO L225 Difference]: With dead ends: 263 [2021-12-06 17:51:50,214 INFO L226 Difference]: Without dead ends: 244 [2021-12-06 17:51:50,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=851, Invalid=7339, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 17:51:50,217 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 150 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:50,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 162 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 17:51:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-06 17:51:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 165. [2021-12-06 17:51:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2926829268292683) internal successors, (212), 164 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 17:51:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 212 transitions. [2021-12-06 17:51:50,228 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 212 transitions. Word has length 27 [2021-12-06 17:51:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:50,228 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 212 transitions. [2021-12-06 17:51:50,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 17:51:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 212 transitions. [2021-12-06 17:51:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:51:50,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:50,229 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:50,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 17:51:50,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 17:51:50,430 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash -329349222, now seen corresponding path program 9 times [2021-12-06 17:51:50,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:50,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481971493] [2021-12-06 17:51:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:50,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:51:50,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:50,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481971493] [2021-12-06 17:51:50,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481971493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:50,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979610686] [2021-12-06 17:51:50,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:51:50,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:50,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:50,557 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:50,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 17:51:50,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:51:50,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:50,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:51:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 17:51:50,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 17:51:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979610686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:50,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:50,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2021-12-06 17:51:50,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072855195] [2021-12-06 17:51:50,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:50,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:51:50,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:51:50,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:51:50,720 INFO L87 Difference]: Start difference. First operand 165 states and 212 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 17:51:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:50,856 INFO L93 Difference]: Finished difference Result 199 states and 261 transitions. [2021-12-06 17:51:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:51:50,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 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 28 [2021-12-06 17:51:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:50,857 INFO L225 Difference]: With dead ends: 199 [2021-12-06 17:51:50,857 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 17:51:50,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:51:50,858 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:50,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 90 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:51:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 17:51:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-12-06 17:51:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.276243093922652) internal successors, (231), 181 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 17:51:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 231 transitions. [2021-12-06 17:51:50,869 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 231 transitions. Word has length 28 [2021-12-06 17:51:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:50,869 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 231 transitions. [2021-12-06 17:51:50,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 17:51:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 231 transitions. [2021-12-06 17:51:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 17:51:50,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:50,870 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:50,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 17:51:51,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:51,071 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1264600192, now seen corresponding path program 6 times [2021-12-06 17:51:51,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:51,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510914572] [2021-12-06 17:51:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:51,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:51:51,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:51,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510914572] [2021-12-06 17:51:51,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510914572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:51,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770681474] [2021-12-06 17:51:51,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:51:51,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:51,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:51,209 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:51,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 17:51:51,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 17:51:51,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:51:51,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 17:51:51,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:51:51,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 17:51:51,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770681474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:51,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:51,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-12-06 17:51:51,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492811460] [2021-12-06 17:51:51,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:51,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 17:51:51,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 17:51:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-12-06 17:51:51,534 INFO L87 Difference]: Start difference. First operand 182 states and 231 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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 17:52:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:59,409 INFO L93 Difference]: Finished difference Result 1002 states and 1228 transitions. [2021-12-06 17:52:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-12-06 17:52:59,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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 29 [2021-12-06 17:52:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:59,413 INFO L225 Difference]: With dead ends: 1002 [2021-12-06 17:52:59,413 INFO L226 Difference]: Without dead ends: 930 [2021-12-06 17:52:59,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37177 ImplicationChecksByTransitivity, 63.5s TimeCoverageRelationStatistics Valid=14184, Invalid=66756, Unknown=0, NotChecked=0, Total=80940 [2021-12-06 17:52:59,423 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1558 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 1128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1128 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:59,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1558 Valid, 658 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1128 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-06 17:52:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-12-06 17:52:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 213. [2021-12-06 17:52:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.2877358490566038) internal successors, (273), 212 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 17:52:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 273 transitions. [2021-12-06 17:52:59,455 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 273 transitions. Word has length 29 [2021-12-06 17:52:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:59,455 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 273 transitions. [2021-12-06 17:52:59,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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 17:52:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 273 transitions. [2021-12-06 17:52:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 17:52:59,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:59,456 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:52:59,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 17:52:59,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 17:52:59,657 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:59,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:59,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1895449321, now seen corresponding path program 6 times [2021-12-06 17:52:59,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:59,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155190099] [2021-12-06 17:52:59,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:59,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:59,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155190099] [2021-12-06 17:52:59,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155190099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:52:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919696529] [2021-12-06 17:52:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:52:59,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:52:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:52:59,823 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:52:59,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 17:52:59,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 17:52:59,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:52:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:52:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 17:53:00,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 17:53:00,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919696529] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:00,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:00,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2021-12-06 17:53:00,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058855116] [2021-12-06 17:53:00,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:00,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 17:53:00,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:00,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 17:53:00,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:53:00,166 INFO L87 Difference]: Start difference. First operand 213 states and 273 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 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 17:53:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:04,273 INFO L93 Difference]: Finished difference Result 518 states and 723 transitions. [2021-12-06 17:53:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 17:53:04,273 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 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 30 [2021-12-06 17:53:04,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:04,275 INFO L225 Difference]: With dead ends: 518 [2021-12-06 17:53:04,275 INFO L226 Difference]: Without dead ends: 482 [2021-12-06 17:53:04,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2582 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1532, Invalid=8368, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 17:53:04,277 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 278 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:04,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 155 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:53:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-06 17:53:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 295. [2021-12-06 17:53:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.3435374149659864) internal successors, (395), 294 states have internal predecessors, (395), 0 states have call successors, (0), 0 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 17:53:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 395 transitions. [2021-12-06 17:53:04,307 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 395 transitions. Word has length 30 [2021-12-06 17:53:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:04,308 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 395 transitions. [2021-12-06 17:53:04,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 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 17:53:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 395 transitions. [2021-12-06 17:53:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 17:53:04,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:04,308 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:04,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 17:53:04,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 17:53:04,509 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:04,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1845062752, now seen corresponding path program 10 times [2021-12-06 17:53:04,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:04,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293622215] [2021-12-06 17:53:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:04,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:53:04,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:04,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293622215] [2021-12-06 17:53:04,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293622215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:04,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34533373] [2021-12-06 17:53:04,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:53:04,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:04,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:04,592 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:04,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 17:53:04,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:53:04,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:53:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 17:53:04,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:04,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:53:04,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34533373] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:04,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:04,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 25 [2021-12-06 17:53:04,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843426698] [2021-12-06 17:53:04,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:04,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:53:04,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:53:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:53:04,918 INFO L87 Difference]: Start difference. First operand 295 states and 395 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 17:53:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:06,205 INFO L93 Difference]: Finished difference Result 383 states and 499 transitions. [2021-12-06 17:53:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 17:53:06,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 31 [2021-12-06 17:53:06,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:06,206 INFO L225 Difference]: With dead ends: 383 [2021-12-06 17:53:06,206 INFO L226 Difference]: Without dead ends: 338 [2021-12-06 17:53:06,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 17:53:06,207 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 119 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:06,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 260 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:53:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-06 17:53:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 283. [2021-12-06 17:53:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.3617021276595744) internal successors, (384), 282 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 17:53:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 384 transitions. [2021-12-06 17:53:06,225 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 384 transitions. Word has length 31 [2021-12-06 17:53:06,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:06,226 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 384 transitions. [2021-12-06 17:53:06,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 17:53:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 384 transitions. [2021-12-06 17:53:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:53:06,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:06,226 INFO L514 BasicCegarLoop]: trace histogram [9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:06,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 17:53:06,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 17:53:06,427 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:06,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2142573915, now seen corresponding path program 7 times [2021-12-06 17:53:06,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:06,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599599461] [2021-12-06 17:53:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:06,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:53:06,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:06,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599599461] [2021-12-06 17:53:06,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599599461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:06,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696219333] [2021-12-06 17:53:06,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:53:06,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:06,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:06,553 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:06,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 17:53:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:53:06,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:53:06,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 17:53:06,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696219333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:06,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:06,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-06 17:53:06,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481544576] [2021-12-06 17:53:06,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 17:53:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 17:53:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:53:06,886 INFO L87 Difference]: Start difference. First operand 283 states and 384 transitions. Second operand has 33 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 17:53:19,875 WARN L227 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:56:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:05,221 INFO L93 Difference]: Finished difference Result 1299 states and 1704 transitions. [2021-12-06 17:56:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2021-12-06 17:56:05,221 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 17:56:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:05,226 INFO L225 Difference]: With dead ends: 1299 [2021-12-06 17:56:05,226 INFO L226 Difference]: Without dead ends: 1214 [2021-12-06 17:56:05,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80088 ImplicationChecksByTransitivity, 168.8s TimeCoverageRelationStatistics Valid=25367, Invalid=143965, Unknown=0, NotChecked=0, Total=169332 [2021-12-06 17:56:05,233 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1974 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 1551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1551 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:05,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1974 Valid, 881 Invalid, 3527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1551 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-12-06 17:56:05,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-12-06 17:56:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 378. [2021-12-06 17:56:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.389920424403183) internal successors, (524), 377 states have internal predecessors, (524), 0 states have call successors, (0), 0 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 17:56:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 524 transitions. [2021-12-06 17:56:05,263 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 524 transitions. Word has length 32 [2021-12-06 17:56:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:05,263 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 524 transitions. [2021-12-06 17:56:05,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 17:56:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 524 transitions. [2021-12-06 17:56:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:56:05,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:05,264 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:05,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 17:56:05,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:05,465 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1443201552, now seen corresponding path program 8 times [2021-12-06 17:56:05,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:05,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032272359] [2021-12-06 17:56:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:05,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:56:05,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:05,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032272359] [2021-12-06 17:56:05,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032272359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453142680] [2021-12-06 17:56:05,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:56:05,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:05,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:05,662 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:05,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 17:56:05,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:56:05,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 17:56:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 17:56:05,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 17:56:05,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453142680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:56:05,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:56:05,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2021-12-06 17:56:05,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040146336] [2021-12-06 17:56:05,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:05,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 17:56:05,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 17:56:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:56:05,892 INFO L87 Difference]: Start difference. First operand 378 states and 524 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 17:56:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:28,805 INFO L93 Difference]: Finished difference Result 522 states and 740 transitions. [2021-12-06 17:56:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-06 17:56:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 17:56:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:28,808 INFO L225 Difference]: With dead ends: 522 [2021-12-06 17:56:28,808 INFO L226 Difference]: Without dead ends: 476 [2021-12-06 17:56:28,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7293 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=1758, Invalid=20294, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 17:56:28,809 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:28,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 152 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:56:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-12-06 17:56:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 406. [2021-12-06 17:56:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.3604938271604938) internal successors, (551), 405 states have internal predecessors, (551), 0 states have call successors, (0), 0 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 17:56:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 551 transitions. [2021-12-06 17:56:28,839 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 551 transitions. Word has length 33 [2021-12-06 17:56:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:28,840 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 551 transitions. [2021-12-06 17:56:28,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 17:56:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 551 transitions. [2021-12-06 17:56:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 17:56:28,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:28,840 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:28,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-06 17:56:29,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:29,041 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:29,041 INFO L85 PathProgramCache]: Analyzing trace with hash -723253233, now seen corresponding path program 9 times [2021-12-06 17:56:29,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:29,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60666674] [2021-12-06 17:56:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:29,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 17:56:29,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:29,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60666674] [2021-12-06 17:56:29,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60666674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:29,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137507749] [2021-12-06 17:56:29,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:56:29,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:29,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:29,224 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:29,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 17:56:29,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:56:29,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:29,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:56:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 17:56:29,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 17:56:29,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137507749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:56:29,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:56:29,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 33 [2021-12-06 17:56:29,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995706111] [2021-12-06 17:56:29,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:29,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 17:56:29,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:29,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 17:56:29,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:56:29,558 INFO L87 Difference]: Start difference. First operand 406 states and 551 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:56:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:43,483 INFO L93 Difference]: Finished difference Result 1073 states and 1530 transitions. [2021-12-06 17:56:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-12-06 17:56:43,483 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 17:56:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:43,486 INFO L225 Difference]: With dead ends: 1073 [2021-12-06 17:56:43,486 INFO L226 Difference]: Without dead ends: 952 [2021-12-06 17:56:43,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16081 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3593, Invalid=41139, Unknown=0, NotChecked=0, Total=44732 [2021-12-06 17:56:43,488 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 342 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 4087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:43,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 833 Invalid, 4087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 3296 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 17:56:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-12-06 17:56:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 474. [2021-12-06 17:56:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.3890063424947146) internal successors, (657), 473 states have internal predecessors, (657), 0 states have call successors, (0), 0 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 17:56:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 657 transitions. [2021-12-06 17:56:43,519 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 657 transitions. Word has length 35 [2021-12-06 17:56:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:43,519 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 657 transitions. [2021-12-06 17:56:43,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:56:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 657 transitions. [2021-12-06 17:56:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:56:43,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:43,520 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:43,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 17:56:43,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:43,721 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:43,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash -633630471, now seen corresponding path program 11 times [2021-12-06 17:56:43,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:43,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324444153] [2021-12-06 17:56:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:43,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:56:43,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:43,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324444153] [2021-12-06 17:56:43,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324444153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:43,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960203679] [2021-12-06 17:56:43,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:56:43,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:43,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:43,848 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:43,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 17:56:44,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 17:56:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 17:56:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:56:44,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 17:56:44,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960203679] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:56:44,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:56:44,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2021-12-06 17:56:44,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229620119] [2021-12-06 17:56:44,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:44,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:56:44,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:56:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:56:44,655 INFO L87 Difference]: Start difference. First operand 474 states and 657 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 17:56:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:44,808 INFO L93 Difference]: Finished difference Result 637 states and 838 transitions. [2021-12-06 17:56:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:56:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 17:56:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:44,810 INFO L225 Difference]: With dead ends: 637 [2021-12-06 17:56:44,810 INFO L226 Difference]: Without dead ends: 594 [2021-12-06 17:56:44,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:56:44,811 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:44,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 297 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:56:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-12-06 17:56:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 484. [2021-12-06 17:56:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.3933747412008282) internal successors, (673), 483 states have internal predecessors, (673), 0 states have call successors, (0), 0 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 17:56:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 673 transitions. [2021-12-06 17:56:44,842 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 673 transitions. Word has length 36 [2021-12-06 17:56:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:56:44,842 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 673 transitions. [2021-12-06 17:56:44,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 17:56:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 673 transitions. [2021-12-06 17:56:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 17:56:44,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:56:44,843 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:56:44,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 17:56:45,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:45,045 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:56:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:56:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1319021946, now seen corresponding path program 12 times [2021-12-06 17:56:45,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:56:45,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420599012] [2021-12-06 17:56:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:56:45,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:56:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:56:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:56:45,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:56:45,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420599012] [2021-12-06 17:56:45,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420599012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:56:45,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287701479] [2021-12-06 17:56:45,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:56:45,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:56:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:56:45,260 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:56:45,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 17:56:45,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 17:56:45,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:56:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 17:56:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:56:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:56:45,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:56:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 17:56:45,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287701479] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:56:45,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:56:45,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2021-12-06 17:56:45,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369640675] [2021-12-06 17:56:45,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:56:45,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 17:56:45,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:56:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 17:56:45,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=810, Unknown=0, NotChecked=0, Total=870 [2021-12-06 17:56:45,691 INFO L87 Difference]: Start difference. First operand 484 states and 673 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:39,555 INFO L93 Difference]: Finished difference Result 701 states and 975 transitions. [2021-12-06 17:57:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-12-06 17:57:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 17:57:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:39,558 INFO L225 Difference]: With dead ends: 701 [2021-12-06 17:57:39,558 INFO L226 Difference]: Without dead ends: 687 [2021-12-06 17:57:39,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11641 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=2542, Invalid=31130, Unknown=0, NotChecked=0, Total=33672 [2021-12-06 17:57:39,560 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 223 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 3162 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:39,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 214 Invalid, 3566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3162 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-06 17:57:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-12-06 17:57:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 497. [2021-12-06 17:57:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.3850806451612903) internal successors, (687), 496 states have internal predecessors, (687), 0 states have call successors, (0), 0 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 17:57:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 687 transitions. [2021-12-06 17:57:39,596 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 687 transitions. Word has length 38 [2021-12-06 17:57:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:39,596 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 687 transitions. [2021-12-06 17:57:39,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 687 transitions. [2021-12-06 17:57:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 17:57:39,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:39,597 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:57:39,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-06 17:57:39,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:39,798 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1994578934, now seen corresponding path program 13 times [2021-12-06 17:57:39,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:39,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330145440] [2021-12-06 17:57:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:39,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 17:57:40,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330145440] [2021-12-06 17:57:40,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330145440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68886294] [2021-12-06 17:57:40,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:57:40,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:57:40,019 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:57:40,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 17:57:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:40,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 17:57:40,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:57:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 17:57:40,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:57:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 17:57:40,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68886294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:57:40,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:57:40,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 30 [2021-12-06 17:57:40,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903916908] [2021-12-06 17:57:40,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:57:40,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 17:57:40,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:40,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 17:57:40,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2021-12-06 17:57:40,259 INFO L87 Difference]: Start difference. First operand 497 states and 687 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 17:57:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:55,230 INFO L93 Difference]: Finished difference Result 932 states and 1261 transitions. [2021-12-06 17:57:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-06 17:57:55,231 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 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 38 [2021-12-06 17:57:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:55,234 INFO L225 Difference]: With dead ends: 932 [2021-12-06 17:57:55,234 INFO L226 Difference]: Without dead ends: 804 [2021-12-06 17:57:55,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1325, Invalid=15705, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 17:57:55,235 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 246 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:55,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 762 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 2292 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 17:57:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-12-06 17:57:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 579. [2021-12-06 17:57:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 1.3667820069204153) internal successors, (790), 578 states have internal predecessors, (790), 0 states have call successors, (0), 0 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 17:57:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 790 transitions. [2021-12-06 17:57:55,274 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 790 transitions. Word has length 38 [2021-12-06 17:57:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:55,274 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 790 transitions. [2021-12-06 17:57:55,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 17:57:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 790 transitions. [2021-12-06 17:57:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:57:55,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:55,276 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:57:55,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-06 17:57:55,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 17:57:55,477 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash -815447191, now seen corresponding path program 14 times [2021-12-06 17:57:55,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:55,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111051572] [2021-12-06 17:57:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:55,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 17:57:55,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:55,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111051572] [2021-12-06 17:57:55,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111051572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:57:55,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520534749] [2021-12-06 17:57:55,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:57:55,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:57:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:57:55,680 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:57:55,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959f8d1c-7195-4cad-9bf2-84f2002b365f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 17:57:55,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:57:55,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:57:55,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 17:57:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:57:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:57:55,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:57:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 17:57:56,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520534749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:57:56,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:57:56,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 43 [2021-12-06 17:57:56,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272942290] [2021-12-06 17:57:56,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:57:56,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 17:57:56,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:56,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 17:57:56,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:57:56,252 INFO L87 Difference]: Start difference. First operand 579 states and 790 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 17:58:40,932 WARN L227 SmtUtils]: Spent 17.99s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:58:47,709 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296)) (< 0 (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 5 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) is different from false [2021-12-06 17:59:05,086 WARN L227 SmtUtils]: Spent 11.90s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:59:25,375 WARN L227 SmtUtils]: Spent 9.98s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:59:40,479 WARN L227 SmtUtils]: Spent 9.34s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:59:56,112 WARN L227 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:00:07,224 WARN L227 SmtUtils]: Spent 7.19s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:00:16,429 WARN L227 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:00:49,403 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296)) (< 0 (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296)) (< 0 (mod (+ 5 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296))) is different from false [2021-12-06 18:01:10,769 WARN L227 SmtUtils]: Spent 8.68s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:27,529 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:01:40,810 WARN L227 SmtUtils]: Spent 8.88s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:02,690 WARN L227 SmtUtils]: Spent 9.23s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:10,712 WARN L227 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:19,222 WARN L227 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:41,876 WARN L227 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:02:55,491 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:03:28,380 WARN L227 SmtUtils]: Spent 6.64s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:04:59,143 WARN L227 SmtUtils]: Spent 7.79s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:05:21,421 WARN L227 SmtUtils]: Spent 9.67s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:05:44,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 18:05:52,548 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:06:05,642 WARN L227 SmtUtils]: Spent 8.60s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)