./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:02:57,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:02:57,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:02:57,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:02:57,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:02:57,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:02:57,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:02:57,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:02:57,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:02:57,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:02:57,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:02:57,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:02:57,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:02:57,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:02:57,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:02:57,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:02:57,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:02:57,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:02:57,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:02:57,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:02:57,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:02:57,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:02:57,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:02:57,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:02:57,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:02:57,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:02:57,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:02:57,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:02:57,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:02:57,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:02:57,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:02:57,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:02:57,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:02:57,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:02:57,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:02:57,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:02:57,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:02:57,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:02:57,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:02:57,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:02:57,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:02:57,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:02:57,817 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:02:57,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:02:57,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:02:57,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:02:57,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:02:57,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:02:57,819 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:02:57,820 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:02:57,820 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:02:57,820 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:02:57,821 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:02:57,821 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:02:57,821 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:02:57,821 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:02:57,822 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:02:57,822 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:02:57,822 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:02:57,823 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:02:57,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:02:57,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:02:57,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:02:57,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:02:57,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:02:57,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:02:57,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:02:57,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:02:57,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:02:57,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:02:57,826 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:02:57,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:02:57,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:02:57,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:02:57,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:02:57,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:02:57,828 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:02:57,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:02:57,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:02:57,829 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:02:57,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:02:57,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:02:57,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:02:57,830 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_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb [2022-11-23 15:02:58,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:02:58,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:02:58,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:02:58,226 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:02:58,228 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:02:58,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2022-11-23 15:03:01,556 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:03:01,960 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:03:01,961 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2022-11-23 15:03:01,985 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/data/f54e8751d/ddc22481252543b3b885054a05e72ac0/FLAG6b9f789ba [2022-11-23 15:03:02,169 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/data/f54e8751d/ddc22481252543b3b885054a05e72ac0 [2022-11-23 15:03:02,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:03:02,177 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:03:02,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:03:02,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:03:02,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:03:02,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:02" (1/1) ... [2022-11-23 15:03:02,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@308a00e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:02, skipping insertion in model container [2022-11-23 15:03:02,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:02" (1/1) ... [2022-11-23 15:03:02,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:03:02,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:03:02,874 WARN L237 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_707ee335-ab18-4e4b-ba79-5456bdc8af30/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2022-11-23 15:03:02,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:03:02,973 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:03:03,210 WARN L237 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_707ee335-ab18-4e4b-ba79-5456bdc8af30/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2022-11-23 15:03:03,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:03:03,289 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:03:03,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03 WrapperNode [2022-11-23 15:03:03,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:03:03,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:03:03,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:03:03,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:03:03,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,411 INFO L138 Inliner]: procedures = 97, calls = 349, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 966 [2022-11-23 15:03:03,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:03:03,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:03:03,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:03:03,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:03:03,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,474 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:03:03,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:03:03,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:03:03,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:03:03,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (1/1) ... [2022-11-23 15:03:03,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:03:03,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:03,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:03:03,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:03:03,593 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 15:03:03,594 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 15:03:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 15:03:03,594 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 15:03:03,594 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 15:03:03,594 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 15:03:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:03:03,595 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 15:03:03,595 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:03:03,595 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:03:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 15:03:03,596 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 15:03:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 15:03:03,596 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 15:03:03,596 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 15:03:03,597 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 15:03:03,597 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 15:03:03,597 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 15:03:03,597 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 15:03:03,597 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 15:03:03,598 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 15:03:03,598 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 15:03:03,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:03:03,600 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-23 15:03:03,600 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-23 15:03:03,601 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 15:03:03,601 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 15:03:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-23 15:03:03,602 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-23 15:03:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 15:03:03,604 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 15:03:03,604 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:03:03,605 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:03:03,605 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-23 15:03:03,605 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-23 15:03:03,605 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 15:03:03,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 15:03:03,606 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 15:03:03,606 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 15:03:03,606 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 15:03:03,607 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 15:03:03,607 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 15:03:03,607 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 15:03:03,607 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 15:03:03,608 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 15:03:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 15:03:03,609 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 15:03:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 15:03:03,609 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 15:03:03,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:03:03,610 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 15:03:03,610 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 15:03:03,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:03:03,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:03:03,611 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 15:03:03,611 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 15:03:03,871 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:03:03,874 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:03:05,333 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:03:06,248 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:03:06,248 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:03:06,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:06 BoogieIcfgContainer [2022-11-23 15:03:06,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:03:06,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:03:06,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:03:06,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:03:06,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:03:02" (1/3) ... [2022-11-23 15:03:06,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2d71c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:06, skipping insertion in model container [2022-11-23 15:03:06,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:03" (2/3) ... [2022-11-23 15:03:06,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2d71c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:06, skipping insertion in model container [2022-11-23 15:03:06,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:06" (3/3) ... [2022-11-23 15:03:06,262 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product31.cil.c [2022-11-23 15:03:06,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:03:06,283 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:03:06,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:03:06,353 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5be15562, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:03:06,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:03:06,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-23 15:03:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 15:03:06,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:06,386 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:06,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1461414302, now seen corresponding path program 1 times [2022-11-23 15:03:06,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:06,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569517482] [2022-11-23 15:03:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:06,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:03:06,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569517482] [2022-11-23 15:03:06,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569517482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:06,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:06,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:03:06,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730905469] [2022-11-23 15:03:06,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:06,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:03:06,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:03:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:03:07,028 INFO L87 Difference]: Start difference. First operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-23 15:03:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:07,320 INFO L93 Difference]: Finished difference Result 415 states and 652 transitions. [2022-11-23 15:03:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:03:07,328 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2022-11-23 15:03:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:07,348 INFO L225 Difference]: With dead ends: 415 [2022-11-23 15:03:07,348 INFO L226 Difference]: Without dead ends: 393 [2022-11-23 15:03:07,353 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:03:07,357 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:07,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 580 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:03:07,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-23 15:03:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-11-23 15:03:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 265 states have (on average 1.5660377358490567) internal successors, (415), 284 states have internal predecessors, (415), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-23 15:03:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 614 transitions. [2022-11-23 15:03:07,458 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 614 transitions. Word has length 77 [2022-11-23 15:03:07,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:07,460 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 614 transitions. [2022-11-23 15:03:07,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-23 15:03:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 614 transitions. [2022-11-23 15:03:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 15:03:07,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:07,469 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:07,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:03:07,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash -305737627, now seen corresponding path program 1 times [2022-11-23 15:03:07,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596728457] [2022-11-23 15:03:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:07,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:03:08,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:08,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596728457] [2022-11-23 15:03:08,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596728457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:08,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:08,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:03:08,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661432840] [2022-11-23 15:03:08,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:08,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:03:08,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:08,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:03:08,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:03:08,318 INFO L87 Difference]: Start difference. First operand 393 states and 614 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:03:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:11,694 INFO L93 Difference]: Finished difference Result 1210 states and 1921 transitions. [2022-11-23 15:03:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:03:11,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2022-11-23 15:03:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:11,703 INFO L225 Difference]: With dead ends: 1210 [2022-11-23 15:03:11,704 INFO L226 Difference]: Without dead ends: 833 [2022-11-23 15:03:11,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:03:11,710 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1209 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:11,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 1606 Invalid, 3115 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [448 Valid, 2667 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 15:03:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-11-23 15:03:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2022-11-23 15:03:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 537 states have (on average 1.5772811918063314) internal successors, (847), 570 states have internal predecessors, (847), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-11-23 15:03:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1244 transitions. [2022-11-23 15:03:11,862 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1244 transitions. Word has length 78 [2022-11-23 15:03:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:11,865 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1244 transitions. [2022-11-23 15:03:11,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 15:03:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1244 transitions. [2022-11-23 15:03:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 15:03:11,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:11,876 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:11,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:03:11,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:11,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1407431251, now seen corresponding path program 1 times [2022-11-23 15:03:11,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216129601] [2022-11-23 15:03:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:11,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:03:12,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:12,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216129601] [2022-11-23 15:03:12,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216129601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:12,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:12,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:03:12,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424186935] [2022-11-23 15:03:12,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:12,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:03:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:03:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:03:12,368 INFO L87 Difference]: Start difference. First operand 784 states and 1244 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 15:03:13,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:13,298 INFO L93 Difference]: Finished difference Result 855 states and 1356 transitions. [2022-11-23 15:03:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-23 15:03:13,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:13,306 INFO L225 Difference]: With dead ends: 855 [2022-11-23 15:03:13,307 INFO L226 Difference]: Without dead ends: 840 [2022-11-23 15:03:13,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:03:13,309 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 708 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:13,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 1900 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:03:13,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-23 15:03:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 788. [2022-11-23 15:03:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5730129390018484) internal successors, (851), 574 states have internal predecessors, (851), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-11-23 15:03:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1248 transitions. [2022-11-23 15:03:13,426 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1248 transitions. Word has length 82 [2022-11-23 15:03:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:13,427 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1248 transitions. [2022-11-23 15:03:13,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 15:03:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1248 transitions. [2022-11-23 15:03:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 15:03:13,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:13,434 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:13,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:03:13,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:13,437 INFO L85 PathProgramCache]: Analyzing trace with hash 96265248, now seen corresponding path program 1 times [2022-11-23 15:03:13,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:13,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962886608] [2022-11-23 15:03:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:13,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:03:13,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:13,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962886608] [2022-11-23 15:03:13,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962886608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:13,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:13,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:03:13,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571677192] [2022-11-23 15:03:13,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:13,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:03:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:03:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:03:13,769 INFO L87 Difference]: Start difference. First operand 788 states and 1248 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-23 15:03:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:13,987 INFO L93 Difference]: Finished difference Result 807 states and 1272 transitions. [2022-11-23 15:03:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:03:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2022-11-23 15:03:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:13,996 INFO L225 Difference]: With dead ends: 807 [2022-11-23 15:03:13,996 INFO L226 Difference]: Without dead ends: 792 [2022-11-23 15:03:13,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:03:14,003 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 30 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2278 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:14,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2278 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:03:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-11-23 15:03:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 788. [2022-11-23 15:03:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5693160813308689) internal successors, (849), 574 states have internal predecessors, (849), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-11-23 15:03:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1246 transitions. [2022-11-23 15:03:14,075 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1246 transitions. Word has length 87 [2022-11-23 15:03:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:14,076 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1246 transitions. [2022-11-23 15:03:14,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-23 15:03:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1246 transitions. [2022-11-23 15:03:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 15:03:14,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:14,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:14,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:03:14,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash 351092467, now seen corresponding path program 1 times [2022-11-23 15:03:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:14,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931194586] [2022-11-23 15:03:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:14,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:03:14,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:14,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931194586] [2022-11-23 15:03:14,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931194586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:14,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:14,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:03:14,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434467997] [2022-11-23 15:03:14,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:14,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:03:14,436 INFO L87 Difference]: Start difference. First operand 788 states and 1246 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:16,493 INFO L93 Difference]: Finished difference Result 2521 states and 4055 transitions. [2022-11-23 15:03:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-11-23 15:03:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:16,515 INFO L225 Difference]: With dead ends: 2521 [2022-11-23 15:03:16,515 INFO L226 Difference]: Without dead ends: 1749 [2022-11-23 15:03:16,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:03:16,529 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1220 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:16,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 706 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 15:03:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-11-23 15:03:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1583. [2022-11-23 15:03:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1109 states have (on average 1.5807033363390441) internal successors, (1753), 1172 states have internal predecessors, (1753), 381 states have call successors, (381), 87 states have call predecessors, (381), 92 states have return successors, (399), 359 states have call predecessors, (399), 376 states have call successors, (399) [2022-11-23 15:03:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2533 transitions. [2022-11-23 15:03:16,687 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2533 transitions. Word has length 94 [2022-11-23 15:03:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:16,690 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 2533 transitions. [2022-11-23 15:03:16,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2533 transitions. [2022-11-23 15:03:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-23 15:03:16,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:16,696 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:16,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:03:16,697 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2001184935, now seen corresponding path program 1 times [2022-11-23 15:03:16,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:16,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498407157] [2022-11-23 15:03:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:03:17,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:17,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498407157] [2022-11-23 15:03:17,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498407157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:17,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:17,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:03:17,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538456560] [2022-11-23 15:03:17,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:17,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:17,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:17,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:03:17,077 INFO L87 Difference]: Start difference. First operand 1583 states and 2533 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:19,227 INFO L93 Difference]: Finished difference Result 4838 states and 7859 transitions. [2022-11-23 15:03:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-11-23 15:03:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:19,257 INFO L225 Difference]: With dead ends: 4838 [2022-11-23 15:03:19,257 INFO L226 Difference]: Without dead ends: 3274 [2022-11-23 15:03:19,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:03:19,268 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1211 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:19,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 710 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 15:03:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2022-11-23 15:03:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 3061. [2022-11-23 15:03:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 2167 states have (on average 1.5874480849100139) internal successors, (3440), 2297 states have internal predecessors, (3440), 710 states have call successors, (710), 165 states have call predecessors, (710), 183 states have return successors, (788), 660 states have call predecessors, (788), 705 states have call successors, (788) [2022-11-23 15:03:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 4938 transitions. [2022-11-23 15:03:19,574 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 4938 transitions. Word has length 95 [2022-11-23 15:03:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:19,576 INFO L495 AbstractCegarLoop]: Abstraction has 3061 states and 4938 transitions. [2022-11-23 15:03:19,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 4938 transitions. [2022-11-23 15:03:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 15:03:19,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:19,580 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:19,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:03:19,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:19,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1907336459, now seen corresponding path program 1 times [2022-11-23 15:03:19,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:19,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962391873] [2022-11-23 15:03:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:19,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:03:19,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:19,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962391873] [2022-11-23 15:03:19,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962391873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:19,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:19,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:03:19,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937569734] [2022-11-23 15:03:19,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:19,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:19,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:03:19,869 INFO L87 Difference]: Start difference. First operand 3061 states and 4938 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:22,321 INFO L93 Difference]: Finished difference Result 9314 states and 15343 transitions. [2022-11-23 15:03:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:22,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2022-11-23 15:03:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:22,382 INFO L225 Difference]: With dead ends: 9314 [2022-11-23 15:03:22,382 INFO L226 Difference]: Without dead ends: 6278 [2022-11-23 15:03:22,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:03:22,417 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1194 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:22,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1270 Valid, 723 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 15:03:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2022-11-23 15:03:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 5962. [2022-11-23 15:03:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5962 states, 4238 states have (on average 1.5875412930627655) internal successors, (6728), 4508 states have internal predecessors, (6728), 1352 states have call successors, (1352), 321 states have call predecessors, (1352), 371 states have return successors, (1642), 1246 states have call predecessors, (1642), 1347 states have call successors, (1642) [2022-11-23 15:03:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5962 states to 5962 states and 9722 transitions. [2022-11-23 15:03:23,090 INFO L78 Accepts]: Start accepts. Automaton has 5962 states and 9722 transitions. Word has length 96 [2022-11-23 15:03:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:23,091 INFO L495 AbstractCegarLoop]: Abstraction has 5962 states and 9722 transitions. [2022-11-23 15:03:23,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 5962 states and 9722 transitions. [2022-11-23 15:03:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-23 15:03:23,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:23,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:23,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:03:23,095 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1001970203, now seen corresponding path program 1 times [2022-11-23 15:03:23,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:23,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932190730] [2022-11-23 15:03:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:23,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:03:23,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:23,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932190730] [2022-11-23 15:03:23,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932190730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:23,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:23,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:03:23,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308179031] [2022-11-23 15:03:23,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:23,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:23,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:23,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:23,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:03:23,329 INFO L87 Difference]: Start difference. First operand 5962 states and 9722 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:26,537 INFO L93 Difference]: Finished difference Result 18119 states and 30598 transitions. [2022-11-23 15:03:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:26,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2022-11-23 15:03:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:26,635 INFO L225 Difference]: With dead ends: 18119 [2022-11-23 15:03:26,635 INFO L226 Difference]: Without dead ends: 12194 [2022-11-23 15:03:26,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:03:26,678 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1181 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:26,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1256 Valid, 735 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 15:03:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12194 states. [2022-11-23 15:03:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12194 to 11663. [2022-11-23 15:03:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11663 states, 8297 states have (on average 1.5841870555622515) internal successors, (13144), 8859 states have internal predecessors, (13144), 2606 states have call successors, (2606), 633 states have call predecessors, (2606), 759 states have return successors, (3648), 2388 states have call predecessors, (3648), 2601 states have call successors, (3648) [2022-11-23 15:03:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11663 states to 11663 states and 19398 transitions. [2022-11-23 15:03:27,828 INFO L78 Accepts]: Start accepts. Automaton has 11663 states and 19398 transitions. Word has length 97 [2022-11-23 15:03:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:27,829 INFO L495 AbstractCegarLoop]: Abstraction has 11663 states and 19398 transitions. [2022-11-23 15:03:27,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 11663 states and 19398 transitions. [2022-11-23 15:03:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 15:03:27,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:27,833 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:27,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:03:27,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:27,834 INFO L85 PathProgramCache]: Analyzing trace with hash 996167415, now seen corresponding path program 1 times [2022-11-23 15:03:27,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:27,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99067932] [2022-11-23 15:03:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:03:28,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:28,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99067932] [2022-11-23 15:03:28,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99067932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:28,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:28,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:03:28,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654217692] [2022-11-23 15:03:28,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:28,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:28,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:28,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:28,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:03:28,124 INFO L87 Difference]: Start difference. First operand 11663 states and 19398 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:32,300 INFO L93 Difference]: Finished difference Result 35520 states and 62814 transitions. [2022-11-23 15:03:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2022-11-23 15:03:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:32,492 INFO L225 Difference]: With dead ends: 35520 [2022-11-23 15:03:32,492 INFO L226 Difference]: Without dead ends: 23908 [2022-11-23 15:03:32,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:03:32,569 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1172 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:32,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 749 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 15:03:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23908 states. [2022-11-23 15:03:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23908 to 22836. [2022-11-23 15:03:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22836 states, 16271 states have (on average 1.582631675987954) internal successors, (25751), 17395 states have internal predecessors, (25751), 5054 states have call successors, (5054), 1255 states have call predecessors, (5054), 1510 states have return successors, (8491), 4611 states have call predecessors, (8491), 5049 states have call successors, (8491) [2022-11-23 15:03:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22836 states to 22836 states and 39296 transitions. [2022-11-23 15:03:35,568 INFO L78 Accepts]: Start accepts. Automaton has 22836 states and 39296 transitions. Word has length 98 [2022-11-23 15:03:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:35,569 INFO L495 AbstractCegarLoop]: Abstraction has 22836 states and 39296 transitions. [2022-11-23 15:03:35,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:03:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 22836 states and 39296 transitions. [2022-11-23 15:03:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 15:03:35,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:35,585 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:35,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:03:35,585 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1756232201, now seen corresponding path program 1 times [2022-11-23 15:03:35,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:35,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426366861] [2022-11-23 15:03:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:35,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 15:03:36,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:36,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426366861] [2022-11-23 15:03:36,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426366861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:36,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:36,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:03:36,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46072180] [2022-11-23 15:03:36,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:36,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:36,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:36,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:03:36,167 INFO L87 Difference]: Start difference. First operand 22836 states and 39296 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 15:03:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:38,483 INFO L93 Difference]: Finished difference Result 48931 states and 87571 transitions. [2022-11-23 15:03:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 146 [2022-11-23 15:03:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:38,669 INFO L225 Difference]: With dead ends: 48931 [2022-11-23 15:03:38,670 INFO L226 Difference]: Without dead ends: 26112 [2022-11-23 15:03:38,796 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:03:38,797 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 116 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:38,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1818 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:03:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26112 states. [2022-11-23 15:03:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26112 to 23076. [2022-11-23 15:03:41,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23076 states, 16494 states have (on average 1.5776039772038317) internal successors, (26021), 17602 states have internal predecessors, (26021), 5071 states have call successors, (5071), 1255 states have call predecessors, (5071), 1510 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-23 15:03:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23076 states to 23076 states and 39600 transitions. [2022-11-23 15:03:41,651 INFO L78 Accepts]: Start accepts. Automaton has 23076 states and 39600 transitions. Word has length 146 [2022-11-23 15:03:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:41,651 INFO L495 AbstractCegarLoop]: Abstraction has 23076 states and 39600 transitions. [2022-11-23 15:03:41,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 15:03:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 23076 states and 39600 transitions. [2022-11-23 15:03:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-23 15:03:41,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:41,665 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:41,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:03:41,665 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:41,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:41,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1535464535, now seen corresponding path program 1 times [2022-11-23 15:03:41,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:41,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705815372] [2022-11-23 15:03:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:41,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-23 15:03:43,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:43,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705815372] [2022-11-23 15:03:43,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705815372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:03:43,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280355888] [2022-11-23 15:03:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:43,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:43,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:43,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:43,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:03:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:03:43,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:03:44,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:03:44,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280355888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:44,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:03:44,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2022-11-23 15:03:44,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266053547] [2022-11-23 15:03:44,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:44,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:44,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:44,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:03:44,150 INFO L87 Difference]: Start difference. First operand 23076 states and 39600 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:03:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:46,633 INFO L93 Difference]: Finished difference Result 48631 states and 86786 transitions. [2022-11-23 15:03:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:46,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 153 [2022-11-23 15:03:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:46,800 INFO L225 Difference]: With dead ends: 48631 [2022-11-23 15:03:46,800 INFO L226 Difference]: Without dead ends: 25572 [2022-11-23 15:03:46,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:03:46,919 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 213 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:46,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1506 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:03:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25572 states. [2022-11-23 15:03:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25572 to 25572. [2022-11-23 15:03:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25572 states, 18926 states have (on average 1.6217372926133362) internal successors, (30693), 20034 states have internal predecessors, (30693), 5071 states have call successors, (5071), 1319 states have call predecessors, (5071), 1574 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-23 15:03:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25572 states to 25572 states and 44272 transitions. [2022-11-23 15:03:49,595 INFO L78 Accepts]: Start accepts. Automaton has 25572 states and 44272 transitions. Word has length 153 [2022-11-23 15:03:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:49,599 INFO L495 AbstractCegarLoop]: Abstraction has 25572 states and 44272 transitions. [2022-11-23 15:03:49,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:03:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25572 states and 44272 transitions. [2022-11-23 15:03:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-23 15:03:49,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:49,781 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:49,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:49,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:03:49,982 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1573789320, now seen corresponding path program 1 times [2022-11-23 15:03:49,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:49,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183689381] [2022-11-23 15:03:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:49,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-23 15:03:50,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183689381] [2022-11-23 15:03:50,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183689381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:03:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102743499] [2022-11-23 15:03:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:50,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:50,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:50,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:03:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:03:50,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 15:03:50,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:03:50,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102743499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:50,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:03:50,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 15:03:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163944061] [2022-11-23 15:03:50,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:50,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:03:50,835 INFO L87 Difference]: Start difference. First operand 25572 states and 44272 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:03:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:53,233 INFO L93 Difference]: Finished difference Result 53623 states and 96064 transitions. [2022-11-23 15:03:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:03:53,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 158 [2022-11-23 15:03:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:53,384 INFO L225 Difference]: With dead ends: 53623 [2022-11-23 15:03:53,384 INFO L226 Difference]: Without dead ends: 28068 [2022-11-23 15:03:53,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:03:53,525 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 211 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:53,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1506 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:03:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28068 states. [2022-11-23 15:03:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28068 to 28068. [2022-11-23 15:03:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28068 states, 21358 states have (on average 1.6558198333177263) internal successors, (35365), 22466 states have internal predecessors, (35365), 5071 states have call successors, (5071), 1383 states have call predecessors, (5071), 1638 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-23 15:03:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28068 states to 28068 states and 48944 transitions. [2022-11-23 15:03:55,799 INFO L78 Accepts]: Start accepts. Automaton has 28068 states and 48944 transitions. Word has length 158 [2022-11-23 15:03:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:55,800 INFO L495 AbstractCegarLoop]: Abstraction has 28068 states and 48944 transitions. [2022-11-23 15:03:55,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:03:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 28068 states and 48944 transitions. [2022-11-23 15:03:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-23 15:03:55,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:55,813 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:55,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:56,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:03:56,024 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash -321044888, now seen corresponding path program 1 times [2022-11-23 15:03:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:56,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212213134] [2022-11-23 15:03:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:56,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-23 15:03:59,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:59,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212213134] [2022-11-23 15:03:59,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212213134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:03:59,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97461477] [2022-11-23 15:03:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:59,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:59,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:59,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:03:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:03:59,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:03:59,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:03:59,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97461477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:59,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:03:59,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-11-23 15:03:59,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897817802] [2022-11-23 15:03:59,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:59,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:59,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:59,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:59,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-11-23 15:03:59,859 INFO L87 Difference]: Start difference. First operand 28068 states and 48944 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:04:02,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:02,248 INFO L93 Difference]: Finished difference Result 58615 states and 105342 transitions. [2022-11-23 15:04:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:04:02,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 162 [2022-11-23 15:04:02,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:02,371 INFO L225 Difference]: With dead ends: 58615 [2022-11-23 15:04:02,371 INFO L226 Difference]: Without dead ends: 30564 [2022-11-23 15:04:02,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:04:02,451 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 209 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:02,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1506 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:04:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30564 states. [2022-11-23 15:04:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30564 to 30564. [2022-11-23 15:04:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30564 states, 23790 states have (on average 1.6829340058848257) internal successors, (40037), 24898 states have internal predecessors, (40037), 5071 states have call successors, (5071), 1447 states have call predecessors, (5071), 1702 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-23 15:04:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30564 states to 30564 states and 53616 transitions. [2022-11-23 15:04:04,485 INFO L78 Accepts]: Start accepts. Automaton has 30564 states and 53616 transitions. Word has length 162 [2022-11-23 15:04:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:04,486 INFO L495 AbstractCegarLoop]: Abstraction has 30564 states and 53616 transitions. [2022-11-23 15:04:04,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:04:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30564 states and 53616 transitions. [2022-11-23 15:04:04,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-23 15:04:04,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:04,497 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:04,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:04,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:04,716 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:04:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1282711703, now seen corresponding path program 1 times [2022-11-23 15:04:04,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:04,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047770499] [2022-11-23 15:04:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:04,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-23 15:04:07,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:07,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047770499] [2022-11-23 15:04:07,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047770499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:04:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102171531] [2022-11-23 15:04:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:07,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:07,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:07,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:04:07,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:04:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:08,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1882 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:04:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:04:08,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:04:08,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102171531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:08,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:04:08,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-11-23 15:04:08,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406178532] [2022-11-23 15:04:08,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:08,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:04:08,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:04:08,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-11-23 15:04:08,204 INFO L87 Difference]: Start difference. First operand 30564 states and 53616 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:04:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:09,899 INFO L93 Difference]: Finished difference Result 63607 states and 114620 transitions. [2022-11-23 15:04:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:04:09,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 165 [2022-11-23 15:04:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:10,022 INFO L225 Difference]: With dead ends: 63607 [2022-11-23 15:04:10,022 INFO L226 Difference]: Without dead ends: 33060 [2022-11-23 15:04:10,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:04:10,121 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 207 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:10,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1506 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:04:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33060 states. [2022-11-23 15:04:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33060 to 33060. [2022-11-23 15:04:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33060 states, 26222 states have (on average 1.7050186865990389) internal successors, (44709), 27330 states have internal predecessors, (44709), 5071 states have call successors, (5071), 1511 states have call predecessors, (5071), 1766 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-23 15:04:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33060 states to 33060 states and 58288 transitions. [2022-11-23 15:04:12,354 INFO L78 Accepts]: Start accepts. Automaton has 33060 states and 58288 transitions. Word has length 165 [2022-11-23 15:04:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:12,355 INFO L495 AbstractCegarLoop]: Abstraction has 33060 states and 58288 transitions. [2022-11-23 15:04:12,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:04:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 33060 states and 58288 transitions. [2022-11-23 15:04:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-23 15:04:12,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:12,369 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:12,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:04:12,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:04:12,580 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:04:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash -284020391, now seen corresponding path program 1 times [2022-11-23 15:04:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:12,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503291709] [2022-11-23 15:04:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:12,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-23 15:04:15,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:15,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503291709] [2022-11-23 15:04:15,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503291709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:04:15,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179694354] [2022-11-23 15:04:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:15,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:15,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:15,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:04:15,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_707ee335-ab18-4e4b-ba79-5456bdc8af30/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:04:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:15,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:04:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 15:04:15,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:04:15,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179694354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:15,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:04:15,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-11-23 15:04:15,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706923638] [2022-11-23 15:04:15,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:15,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:04:15,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:04:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-11-23 15:04:15,924 INFO L87 Difference]: Start difference. First operand 33060 states and 58288 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 15:04:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:17,738 INFO L93 Difference]: Finished difference Result 68599 states and 123898 transitions. [2022-11-23 15:04:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:04:17,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 167 [2022-11-23 15:04:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:17,868 INFO L225 Difference]: With dead ends: 68599 [2022-11-23 15:04:17,868 INFO L226 Difference]: Without dead ends: 35556 [2022-11-23 15:04:17,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:04:17,951 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 205 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:17,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1506 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:04:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35556 states.