./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI --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 d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 --- 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-5e519f3 [2022-11-03 03:27:37,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:27:37,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:27:37,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:27:37,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:27:37,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:27:37,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:27:37,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:27:37,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:27:37,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:27:37,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:27:37,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:27:37,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:27:37,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:27:37,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:27:37,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:27:37,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:27:37,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:27:37,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:27:37,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:27:37,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:27:37,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:27:37,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:27:37,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:27:37,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:27:37,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:27:37,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:27:37,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:27:37,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:27:37,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:27:37,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:27:37,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:27:37,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:27:37,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:27:37,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:27:37,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:27:37,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:27:37,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:27:37,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:27:37,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:27:37,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:27:37,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:27:37,693 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:27:37,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:27:37,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:27:37,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:27:37,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:27:37,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:27:37,695 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:27:37,696 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:27:37,696 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:27:37,696 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:27:37,698 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:27:37,698 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:27:37,698 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:27:37,698 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:27:37,699 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:27:37,699 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:27:37,699 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:27:37,700 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:27:37,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:27:37,701 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:27:37,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:27:37,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:27:37,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:27:37,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:27:37,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:27:37,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:27:37,702 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:27:37,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:27:37,705 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:27:37,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:27:37,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:27:37,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:27:37,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:37,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:27:37,706 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:27:37,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:27:37,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:27:37,708 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:27:37,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:27:37,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:27:37,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:27:37,709 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_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 [2022-11-03 03:27:38,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:27:38,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:27:38,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:27:38,069 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:27:38,070 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:27:38,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2022-11-03 03:27:38,155 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/data/037413e1f/34e56660e9924bfc84c482e653671a36/FLAG03a27e751 [2022-11-03 03:27:38,806 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:27:38,807 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2022-11-03 03:27:38,842 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/data/037413e1f/34e56660e9924bfc84c482e653671a36/FLAG03a27e751 [2022-11-03 03:27:39,000 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/data/037413e1f/34e56660e9924bfc84c482e653671a36 [2022-11-03 03:27:39,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:27:39,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:27:39,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:39,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:27:39,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:27:39,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:39,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59aac8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39, skipping insertion in model container [2022-11-03 03:27:39,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:39,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:27:39,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:27:39,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2022-11-03 03:27:39,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:39,785 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:27:39,821 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2022-11-03 03:27:39,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:39,992 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:27:39,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39 WrapperNode [2022-11-03 03:27:39,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:39,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:39,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:27:39,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:27:40,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,122 INFO L138 Inliner]: procedures = 99, calls = 356, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 970 [2022-11-03 03:27:40,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:40,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:27:40,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:27:40,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:27:40,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:27:40,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:27:40,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:27:40,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:27:40,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (1/1) ... [2022-11-03 03:27:40,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:40,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:40,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:27:40,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:27:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:27:40,303 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:27:40,303 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:27:40,304 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:27:40,304 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:27:40,304 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:27:40,304 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 03:27:40,304 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 03:27:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:27:40,305 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:27:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:27:40,305 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:27:40,305 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:27:40,306 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:27:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 03:27:40,306 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 03:27:40,306 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 03:27:40,307 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 03:27:40,307 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:27:40,307 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:27:40,307 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:27:40,307 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:27:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 03:27:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 03:27:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:27:40,308 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:27:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 03:27:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:27:40,309 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:27:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 03:27:40,309 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 03:27:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:27:40,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:27:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:27:40,310 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:27:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 03:27:40,311 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 03:27:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:27:40,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:27:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:27:40,315 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:27:40,316 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:27:40,316 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:27:40,317 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:27:40,317 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:27:40,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:27:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:27:40,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:27:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:27:40,320 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:27:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-03 03:27:40,321 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-03 03:27:40,492 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:27:40,495 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:27:41,725 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:27:42,642 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:27:42,642 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:27:42,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:42 BoogieIcfgContainer [2022-11-03 03:27:42,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:27:42,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:27:42,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:27:42,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:27:42,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:27:39" (1/3) ... [2022-11-03 03:27:42,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cb74c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:42, skipping insertion in model container [2022-11-03 03:27:42,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:39" (2/3) ... [2022-11-03 03:27:42,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cb74c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:42, skipping insertion in model container [2022-11-03 03:27:42,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:42" (3/3) ... [2022-11-03 03:27:42,664 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product32.cil.c [2022-11-03 03:27:42,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:27:42,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:27:42,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:27:42,800 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;@35619e61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:27:42,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:27:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-03 03:27:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:27:42,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:42,829 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:27:42,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 990529142, now seen corresponding path program 1 times [2022-11-03 03:27:42,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:42,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48562378] [2022-11-03 03:27:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:42,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:27:43,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:43,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48562378] [2022-11-03 03:27:43,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48562378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:43,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:43,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:27:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057718793] [2022-11-03 03:27:43,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:43,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:27:43,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:43,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:27:43,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:27:43,988 INFO L87 Difference]: Start difference. First operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 03:27:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:46,802 INFO L93 Difference]: Finished difference Result 1329 states and 2129 transitions. [2022-11-03 03:27:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:27:46,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-11-03 03:27:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:46,826 INFO L225 Difference]: With dead ends: 1329 [2022-11-03 03:27:46,827 INFO L226 Difference]: Without dead ends: 933 [2022-11-03 03:27:46,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:27:46,844 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 1679 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:46,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1753 Valid, 1254 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:27:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-11-03 03:27:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 846. [2022-11-03 03:27:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 589 states have (on average 1.5823429541595926) internal successors, (932), 619 states have internal predecessors, (932), 207 states have call successors, (207), 48 states have call predecessors, (207), 49 states have return successors, (209), 191 states have call predecessors, (209), 202 states have call successors, (209) [2022-11-03 03:27:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1348 transitions. [2022-11-03 03:27:47,060 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1348 transitions. Word has length 54 [2022-11-03 03:27:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:47,061 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1348 transitions. [2022-11-03 03:27:47,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-03 03:27:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1348 transitions. [2022-11-03 03:27:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 03:27:47,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:47,081 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:47,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:27:47,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:47,082 INFO L85 PathProgramCache]: Analyzing trace with hash 90202237, now seen corresponding path program 1 times [2022-11-03 03:27:47,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:47,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023294058] [2022-11-03 03:27:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:27:47,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:47,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023294058] [2022-11-03 03:27:47,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023294058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:47,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:47,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:27:47,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017665547] [2022-11-03 03:27:47,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:47,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:27:47,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:27:47,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:27:47,767 INFO L87 Difference]: Start difference. First operand 846 states and 1348 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 03:27:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:50,563 INFO L93 Difference]: Finished difference Result 2624 states and 4232 transitions. [2022-11-03 03:27:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:27:50,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2022-11-03 03:27:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:50,596 INFO L225 Difference]: With dead ends: 2624 [2022-11-03 03:27:50,597 INFO L226 Difference]: Without dead ends: 1802 [2022-11-03 03:27:50,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:27:50,610 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 1205 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:50,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 1926 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:27:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-11-03 03:27:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1715. [2022-11-03 03:27:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1206 states have (on average 1.5887230514096187) internal successors, (1916), 1262 states have internal predecessors, (1916), 409 states have call successors, (409), 92 states have call predecessors, (409), 99 states have return successors, (436), 384 states have call predecessors, (436), 404 states have call successors, (436) [2022-11-03 03:27:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2761 transitions. [2022-11-03 03:27:50,781 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2761 transitions. Word has length 99 [2022-11-03 03:27:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:50,787 INFO L495 AbstractCegarLoop]: Abstraction has 1715 states and 2761 transitions. [2022-11-03 03:27:50,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 03:27:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2761 transitions. [2022-11-03 03:27:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 03:27:50,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:50,795 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:50,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:27:50,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:50,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:50,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1398610745, now seen corresponding path program 1 times [2022-11-03 03:27:50,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:50,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143940748] [2022-11-03 03:27:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:50,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:27:51,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:51,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143940748] [2022-11-03 03:27:51,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143940748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:51,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:51,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 03:27:51,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265729358] [2022-11-03 03:27:51,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:51,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:27:51,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:51,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:27:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:27:51,599 INFO L87 Difference]: Start difference. First operand 1715 states and 2761 transitions. Second operand has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-03 03:27:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:55,573 INFO L93 Difference]: Finished difference Result 4328 states and 6952 transitions. [2022-11-03 03:27:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:27:55,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 102 [2022-11-03 03:27:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:55,592 INFO L225 Difference]: With dead ends: 4328 [2022-11-03 03:27:55,593 INFO L226 Difference]: Without dead ends: 2636 [2022-11-03 03:27:55,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:27:55,603 INFO L413 NwaCegarLoop]: 1033 mSDtfsCounter, 1043 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 4946 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 5402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 4946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:55,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 3272 Invalid, 5402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 4946 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 03:27:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-11-03 03:27:55,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2553. [2022-11-03 03:27:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 1780 states have (on average 1.5719101123595505) internal successors, (2798), 1858 states have internal predecessors, (2798), 615 states have call successors, (615), 138 states have call predecessors, (615), 157 states have return successors, (660), 589 states have call predecessors, (660), 610 states have call successors, (660) [2022-11-03 03:27:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 4073 transitions. [2022-11-03 03:27:55,795 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 4073 transitions. Word has length 102 [2022-11-03 03:27:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:55,796 INFO L495 AbstractCegarLoop]: Abstraction has 2553 states and 4073 transitions. [2022-11-03 03:27:55,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2022-11-03 03:27:55,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 4073 transitions. [2022-11-03 03:27:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 03:27:55,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:55,801 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:55,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:27:55,802 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash 521894974, now seen corresponding path program 1 times [2022-11-03 03:27:55,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:55,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198550049] [2022-11-03 03:27:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:55,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:27:56,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:56,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198550049] [2022-11-03 03:27:56,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198550049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:56,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:56,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:27:56,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75745549] [2022-11-03 03:27:56,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:56,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:27:56,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:27:56,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:27:56,256 INFO L87 Difference]: Start difference. First operand 2553 states and 4073 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:27:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:57,198 INFO L93 Difference]: Finished difference Result 2654 states and 4241 transitions. [2022-11-03 03:27:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:27:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2022-11-03 03:27:57,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:57,221 INFO L225 Difference]: With dead ends: 2654 [2022-11-03 03:27:57,222 INFO L226 Difference]: Without dead ends: 2639 [2022-11-03 03:27:57,225 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 [2022-11-03 03:27:57,232 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 728 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:57,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1964 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:27:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-11-03 03:27:57,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2559. [2022-11-03 03:27:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1786 states have (on average 1.5699888017917134) internal successors, (2804), 1864 states have internal predecessors, (2804), 615 states have call successors, (615), 138 states have call predecessors, (615), 157 states have return successors, (660), 589 states have call predecessors, (660), 610 states have call successors, (660) [2022-11-03 03:27:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 4079 transitions. [2022-11-03 03:27:57,507 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 4079 transitions. Word has length 103 [2022-11-03 03:27:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:57,510 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 4079 transitions. [2022-11-03 03:27:57,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:27:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 4079 transitions. [2022-11-03 03:27:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:27:57,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:57,517 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:57,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:27:57,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:57,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1761517624, now seen corresponding path program 1 times [2022-11-03 03:27:57,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:57,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185337208] [2022-11-03 03:27:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:57,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:27:57,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:58,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185337208] [2022-11-03 03:27:58,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185337208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:58,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:58,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:27:58,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992710548] [2022-11-03 03:27:58,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:58,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:27:58,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:58,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:27:58,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:27:58,002 INFO L87 Difference]: Start difference. First operand 2559 states and 4079 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:27:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:58,819 INFO L93 Difference]: Finished difference Result 2704 states and 4284 transitions. [2022-11-03 03:27:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:27:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 108 [2022-11-03 03:27:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:58,838 INFO L225 Difference]: With dead ends: 2704 [2022-11-03 03:27:58,838 INFO L226 Difference]: Without dead ends: 2689 [2022-11-03 03:27:58,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:27:58,842 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 661 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 2926 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:58,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 2926 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:27:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2022-11-03 03:27:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2635. [2022-11-03 03:27:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1838 states have (on average 1.5625680087051144) internal successors, (2872), 1916 states have internal predecessors, (2872), 631 states have call successors, (631), 146 states have call predecessors, (631), 165 states have return successors, (686), 605 states have call predecessors, (686), 626 states have call successors, (686) [2022-11-03 03:27:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4189 transitions. [2022-11-03 03:27:59,122 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4189 transitions. Word has length 108 [2022-11-03 03:27:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:59,123 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4189 transitions. [2022-11-03 03:27:59,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:27:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4189 transitions. [2022-11-03 03:27:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 03:27:59,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:59,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:59,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:27:59,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 675354164, now seen corresponding path program 1 times [2022-11-03 03:27:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:59,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215589478] [2022-11-03 03:27:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:59,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:28:03,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:03,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215589478] [2022-11-03 03:28:03,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215589478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:03,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208244710] [2022-11-03 03:28:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:03,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:03,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:03,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:03,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:28:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:04,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:28:04,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:28:04,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:28:04,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208244710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:04,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:28:04,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [23] total 25 [2022-11-03 03:28:04,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128446267] [2022-11-03 03:28:04,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:04,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:04,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:04,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:04,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:28:04,380 INFO L87 Difference]: Start difference. First operand 2635 states and 4189 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-03 03:28:04,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:04,853 INFO L93 Difference]: Finished difference Result 2795 states and 4460 transitions. [2022-11-03 03:28:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:28:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 115 [2022-11-03 03:28:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:04,874 INFO L225 Difference]: With dead ends: 2795 [2022-11-03 03:28:04,875 INFO L226 Difference]: Without dead ends: 2780 [2022-11-03 03:28:04,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:28:04,879 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 47 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:04,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1853 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2022-11-03 03:28:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2651. [2022-11-03 03:28:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 1854 states have (on average 1.557713052858684) internal successors, (2888), 1932 states have internal predecessors, (2888), 631 states have call successors, (631), 146 states have call predecessors, (631), 165 states have return successors, (686), 605 states have call predecessors, (686), 626 states have call successors, (686) [2022-11-03 03:28:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 4205 transitions. [2022-11-03 03:28:05,118 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 4205 transitions. Word has length 115 [2022-11-03 03:28:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:05,120 INFO L495 AbstractCegarLoop]: Abstraction has 2651 states and 4205 transitions. [2022-11-03 03:28:05,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-03 03:28:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 4205 transitions. [2022-11-03 03:28:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-03 03:28:05,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:05,128 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:05,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:05,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:05,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash 110156208, now seen corresponding path program 1 times [2022-11-03 03:28:05,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:05,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981773015] [2022-11-03 03:28:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:05,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 03:28:07,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981773015] [2022-11-03 03:28:07,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981773015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:07,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796479542] [2022-11-03 03:28:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:07,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:07,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:07,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111401ef-8b48-4c05-94f3-91066d26eef1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:28:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 03:28:07,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:28:10,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:04,460 WARN L234 SmtUtils]: Spent 48.79s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 03:29:52,746 WARN L234 SmtUtils]: Spent 47.68s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 03:29:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:29:53,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796479542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:53,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1972268285] [2022-11-03 03:29:53,683 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2022-11-03 03:29:53,683 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:53,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:53,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:53,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:01,994 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 451 for LOIs [2022-11-03 03:30:02,066 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 594 for LOIs [2022-11-03 03:30:11,138 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 594 for LOIs [2022-11-03 03:30:15,560 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 578 for LOIs [2022-11-03 03:30:25,197 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 453 for LOIs [2022-11-03 03:30:27,339 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 509 for LOIs [2022-11-03 03:30:29,525 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 59 for LOIs [2022-11-03 03:30:29,538 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 445 for LOIs [2022-11-03 03:30:29,606 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 81 for LOIs [2022-11-03 03:30:29,613 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 599 for LOIs [2022-11-03 03:30:33,308 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 428 for LOIs [2022-11-03 03:30:33,372 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 459 for LOIs [2022-11-03 03:30:34,281 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 455 for LOIs [2022-11-03 03:30:34,354 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 562 for LOIs [2022-11-03 03:30:36,985 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 841 for LOIs