./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.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_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/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_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/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_f671ffdb-9092-4054-83fa-224e2e2d2093/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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- 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 04:02:14,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:02:14,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:02:14,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:02:14,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:02:14,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:02:14,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:02:14,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:02:14,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:02:14,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:02:14,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:02:14,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:02:14,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:02:14,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:02:14,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:02:14,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:02:14,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:02:14,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:02:14,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:02:14,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:02:14,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:02:14,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:02:14,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:02:14,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:02:14,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:02:14,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:02:14,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:02:14,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:02:14,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:02:14,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:02:14,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:02:14,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:02:14,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:02:14,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:02:14,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:02:14,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:02:14,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:02:14,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:02:14,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:02:14,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:02:14,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:02:14,852 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:02:14,890 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:02:14,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:02:14,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:02:14,891 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:02:14,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:02:14,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:02:14,893 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:02:14,893 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:02:14,893 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:02:14,893 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:02:14,894 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:02:14,898 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:02:14,898 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:02:14,899 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:02:14,899 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:02:14,899 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:02:14,900 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:02:14,900 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:02:14,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:02:14,901 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:02:14,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:02:14,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:02:14,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:02:14,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:02:14,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:02:14,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:02:14,903 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:02:14,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:02:14,904 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:02:14,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:02:14,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:02:14,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:02:14,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:14,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:02:14,906 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:02:14,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:02:14,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:02:14,906 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:02:14,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:02:14,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:02:14,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:02:14,907 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_f671ffdb-9092-4054-83fa-224e2e2d2093/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2022-11-03 04:02:15,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:02:15,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:02:15,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:02:15,338 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:02:15,340 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:02:15,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2022-11-03 04:02:15,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data/f5d37d6cd/47652ae0e19e48f8b95d933f7811edae/FLAG2e19f47bf [2022-11-03 04:02:16,356 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:02:16,360 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2022-11-03 04:02:16,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data/f5d37d6cd/47652ae0e19e48f8b95d933f7811edae/FLAG2e19f47bf [2022-11-03 04:02:16,460 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data/f5d37d6cd/47652ae0e19e48f8b95d933f7811edae [2022-11-03 04:02:16,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:02:16,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:02:16,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:16,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:02:16,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:02:16,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:16" (1/1) ... [2022-11-03 04:02:16,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38bd1c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:16, skipping insertion in model container [2022-11-03 04:02:16,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:16" (1/1) ... [2022-11-03 04:02:16,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:02:16,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:02:17,339 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_f671ffdb-9092-4054-83fa-224e2e2d2093/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2022-11-03 04:02:17,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:17,452 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:02:17,618 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_f671ffdb-9092-4054-83fa-224e2e2d2093/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2022-11-03 04:02:17,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:17,676 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:02:17,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17 WrapperNode [2022-11-03 04:02:17,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:17,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:17,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:02:17,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:02:17,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:17,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:17,863 INFO L138 Inliner]: procedures = 90, calls = 338, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 818 [2022-11-03 04:02:17,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:17,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:02:17,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:02:17,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:02:17,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:17,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:17,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:17,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:17,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:17,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:18,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:18,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:18,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:02:18,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:02:18,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:02:18,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:02:18,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (1/1) ... [2022-11-03 04:02:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:18,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:02:18,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:02:18,150 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 04:02:18,150 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 04:02:18,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:02:18,150 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 04:02:18,151 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 04:02:18,151 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 04:02:18,151 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 04:02:18,151 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-11-03 04:02:18,151 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-11-03 04:02:18,151 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 04:02:18,152 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 04:02:18,152 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 04:02:18,152 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 04:02:18,152 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 04:02:18,152 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 04:02:18,152 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 04:02:18,153 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 04:02:18,153 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 04:02:18,153 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 04:02:18,153 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 04:02:18,153 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 04:02:18,153 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 04:02:18,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 04:02:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 04:02:18,154 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 04:02:18,154 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 04:02:18,155 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 04:02:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 04:02:18,155 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 04:02:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 04:02:18,155 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 04:02:18,155 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 04:02:18,156 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 04:02:18,156 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 04:02:18,156 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 04:02:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 04:02:18,157 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 04:02:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 04:02:18,157 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 04:02:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:02:18,157 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 04:02:18,158 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 04:02:18,158 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 04:02:18,159 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 04:02:18,159 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 04:02:18,160 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 04:02:18,161 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 04:02:18,161 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 04:02:18,161 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 04:02:18,162 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 04:02:18,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:02:18,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:02:18,163 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 04:02:18,164 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 04:02:18,418 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:02:18,423 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:02:19,915 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:02:20,764 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:02:20,765 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 04:02:20,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:20 BoogieIcfgContainer [2022-11-03 04:02:20,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:02:20,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:02:20,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:02:20,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:02:20,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:02:16" (1/3) ... [2022-11-03 04:02:20,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18660eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:20, skipping insertion in model container [2022-11-03 04:02:20,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:17" (2/3) ... [2022-11-03 04:02:20,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18660eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:20, skipping insertion in model container [2022-11-03 04:02:20,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:20" (3/3) ... [2022-11-03 04:02:20,780 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2022-11-03 04:02:20,799 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:02:20,799 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:02:20,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:02:20,880 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;@6e136b7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:02:20,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:02:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 04:02:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 04:02:20,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:20,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:20,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash 5537700, now seen corresponding path program 1 times [2022-11-03 04:02:20,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:20,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618273876] [2022-11-03 04:02:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:20,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:22,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:22,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618273876] [2022-11-03 04:02:22,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618273876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:22,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:22,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:22,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513980773] [2022-11-03 04:02:22,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:22,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:22,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:22,115 INFO L87 Difference]: Start difference. First operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 04:02:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:23,199 INFO L93 Difference]: Finished difference Result 1204 states and 1950 transitions. [2022-11-03 04:02:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:02:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-11-03 04:02:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:23,237 INFO L225 Difference]: With dead ends: 1204 [2022-11-03 04:02:23,238 INFO L226 Difference]: Without dead ends: 800 [2022-11-03 04:02:23,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:02:23,262 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 1011 mSDsluCounter, 3832 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 4449 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:23,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 4449 Invalid, 447 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:02:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-11-03 04:02:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 784. [2022-11-03 04:02:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 549 states have (on average 1.5810564663023678) internal successors, (868), 576 states have internal predecessors, (868), 188 states have call successors, (188), 47 states have call predecessors, (188), 46 states have return successors, (193), 185 states have call predecessors, (193), 184 states have call successors, (193) [2022-11-03 04:02:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1249 transitions. [2022-11-03 04:02:23,403 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1249 transitions. Word has length 82 [2022-11-03 04:02:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:23,404 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1249 transitions. [2022-11-03 04:02:23,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 04:02:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1249 transitions. [2022-11-03 04:02:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 04:02:23,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:23,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:23,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:02:23,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:23,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1875561754, now seen corresponding path program 1 times [2022-11-03 04:02:23,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:23,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315869235] [2022-11-03 04:02:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:23,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:24,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:24,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315869235] [2022-11-03 04:02:24,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315869235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:24,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:24,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:02:24,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565239551] [2022-11-03 04:02:24,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:24,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:24,881 INFO L87 Difference]: Start difference. First operand 784 states and 1249 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 04:02:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:27,019 INFO L93 Difference]: Finished difference Result 3051 states and 4958 transitions. [2022-11-03 04:02:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:27,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2022-11-03 04:02:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:27,045 INFO L225 Difference]: With dead ends: 3051 [2022-11-03 04:02:27,045 INFO L226 Difference]: Without dead ends: 2282 [2022-11-03 04:02:27,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:27,059 INFO L413 NwaCegarLoop]: 1248 mSDtfsCounter, 1182 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 3100 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:27,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1186 Valid, 3100 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 04:02:27,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2022-11-03 04:02:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1968. [2022-11-03 04:02:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1429 states have (on average 1.5612316305108467) internal successors, (2231), 1481 states have internal predecessors, (2231), 422 states have call successors, (422), 117 states have call predecessors, (422), 116 states have return successors, (492), 407 states have call predecessors, (492), 414 states have call successors, (492) [2022-11-03 04:02:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 3145 transitions. [2022-11-03 04:02:27,341 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 3145 transitions. Word has length 87 [2022-11-03 04:02:27,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:27,343 INFO L495 AbstractCegarLoop]: Abstraction has 1968 states and 3145 transitions. [2022-11-03 04:02:27,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 04:02:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 3145 transitions. [2022-11-03 04:02:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 04:02:27,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:27,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:27,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:02:27,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:27,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1759243421, now seen corresponding path program 1 times [2022-11-03 04:02:27,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:27,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764310984] [2022-11-03 04:02:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:27,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:27,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:27,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764310984] [2022-11-03 04:02:27,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764310984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:27,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:27,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:27,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051854841] [2022-11-03 04:02:27,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:27,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:27,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:27,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:27,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:27,809 INFO L87 Difference]: Start difference. First operand 1968 states and 3145 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:02:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:28,340 INFO L93 Difference]: Finished difference Result 3091 states and 4974 transitions. [2022-11-03 04:02:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2022-11-03 04:02:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:28,367 INFO L225 Difference]: With dead ends: 3091 [2022-11-03 04:02:28,368 INFO L226 Difference]: Without dead ends: 2099 [2022-11-03 04:02:28,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:28,390 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 32 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3776 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:28,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3776 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:02:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2022-11-03 04:02:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2063. [2022-11-03 04:02:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 1496 states have (on average 1.5481283422459893) internal successors, (2316), 1549 states have internal predecessors, (2316), 434 states have call successors, (434), 117 states have call predecessors, (434), 132 states have return successors, (559), 434 states have call predecessors, (559), 426 states have call successors, (559) [2022-11-03 04:02:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 3309 transitions. [2022-11-03 04:02:28,653 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 3309 transitions. Word has length 86 [2022-11-03 04:02:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:28,655 INFO L495 AbstractCegarLoop]: Abstraction has 2063 states and 3309 transitions. [2022-11-03 04:02:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:02:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 3309 transitions. [2022-11-03 04:02:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 04:02:28,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:28,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:28,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:02:28,662 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1201600250, now seen corresponding path program 1 times [2022-11-03 04:02:28,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:28,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550881133] [2022-11-03 04:02:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:28,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:29,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:29,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550881133] [2022-11-03 04:02:29,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550881133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:29,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:29,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:02:29,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675036026] [2022-11-03 04:02:29,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:29,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:29,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:29,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:29,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:29,143 INFO L87 Difference]: Start difference. First operand 2063 states and 3309 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:02:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:29,614 INFO L93 Difference]: Finished difference Result 3193 states and 5130 transitions. [2022-11-03 04:02:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2022-11-03 04:02:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:29,637 INFO L225 Difference]: With dead ends: 3193 [2022-11-03 04:02:29,637 INFO L226 Difference]: Without dead ends: 2132 [2022-11-03 04:02:29,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:29,655 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3332 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3795 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:29,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3795 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-11-03 04:02:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2070. [2022-11-03 04:02:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 1503 states have (on average 1.5455755156353959) internal successors, (2323), 1549 states have internal predecessors, (2323), 434 states have call successors, (434), 117 states have call predecessors, (434), 132 states have return successors, (559), 441 states have call predecessors, (559), 426 states have call successors, (559) [2022-11-03 04:02:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3316 transitions. [2022-11-03 04:02:29,916 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3316 transitions. Word has length 87 [2022-11-03 04:02:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:29,917 INFO L495 AbstractCegarLoop]: Abstraction has 2070 states and 3316 transitions. [2022-11-03 04:02:29,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:02:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3316 transitions. [2022-11-03 04:02:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 04:02:29,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:29,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:29,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:02:29,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:29,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1617245847, now seen corresponding path program 1 times [2022-11-03 04:02:29,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:29,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247716427] [2022-11-03 04:02:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:29,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:30,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:30,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247716427] [2022-11-03 04:02:30,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247716427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:30,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:30,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:02:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056187801] [2022-11-03 04:02:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:30,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:30,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:30,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:30,274 INFO L87 Difference]: Start difference. First operand 2070 states and 3316 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, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 04:02:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:31,845 INFO L93 Difference]: Finished difference Result 4535 states and 7325 transitions. [2022-11-03 04:02:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:02:31,846 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, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-11-03 04:02:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:31,871 INFO L225 Difference]: With dead ends: 4535 [2022-11-03 04:02:31,871 INFO L226 Difference]: Without dead ends: 3111 [2022-11-03 04:02:31,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:31,888 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 1146 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:31,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 2136 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 04:02:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-03 04:02:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3070. [2022-11-03 04:02:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 2199 states have (on average 1.4943155979990905) internal successors, (3286), 2271 states have internal predecessors, (3286), 651 states have call successors, (651), 194 states have call predecessors, (651), 219 states have return successors, (882), 662 states have call predecessors, (882), 640 states have call successors, (882) [2022-11-03 04:02:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 4819 transitions. [2022-11-03 04:02:32,232 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 4819 transitions. Word has length 93 [2022-11-03 04:02:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:32,236 INFO L495 AbstractCegarLoop]: Abstraction has 3070 states and 4819 transitions. [2022-11-03 04:02:32,236 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, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 04:02:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 4819 transitions. [2022-11-03 04:02:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 04:02:32,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:32,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:32,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:02:32,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:32,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1301135404, now seen corresponding path program 1 times [2022-11-03 04:02:32,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:32,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701853798] [2022-11-03 04:02:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:32,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:32,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701853798] [2022-11-03 04:02:32,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701853798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:32,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:32,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:02:32,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360249935] [2022-11-03 04:02:32,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:32,641 INFO L87 Difference]: Start difference. First operand 3070 states and 4819 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 04:02:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:33,551 INFO L93 Difference]: Finished difference Result 5309 states and 8380 transitions. [2022-11-03 04:02:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:33,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2022-11-03 04:02:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:33,580 INFO L225 Difference]: With dead ends: 5309 [2022-11-03 04:02:33,580 INFO L226 Difference]: Without dead ends: 3111 [2022-11-03 04:02:33,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:33,603 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 519 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:33,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 2839 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:02:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-03 04:02:33,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3086. [2022-11-03 04:02:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2208 states have (on average 1.4923007246376812) internal successors, (3295), 2284 states have internal predecessors, (3295), 655 states have call successors, (655), 197 states have call predecessors, (655), 222 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-03 04:02:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4843 transitions. [2022-11-03 04:02:33,990 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4843 transitions. Word has length 95 [2022-11-03 04:02:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:33,990 INFO L495 AbstractCegarLoop]: Abstraction has 3086 states and 4843 transitions. [2022-11-03 04:02:33,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 04:02:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4843 transitions. [2022-11-03 04:02:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 04:02:33,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:33,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 04:02:33,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2045698277, now seen corresponding path program 1 times [2022-11-03 04:02:33,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:33,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465058202] [2022-11-03 04:02:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:33,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:02:34,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:34,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465058202] [2022-11-03 04:02:34,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465058202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:34,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685382898] [2022-11-03 04:02:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:34,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:34,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:34,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:34,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:02:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:02:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:02:34,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:34,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685382898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:34,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:34,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-03 04:02:34,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234957334] [2022-11-03 04:02:34,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:34,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:34,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:34,651 INFO L87 Difference]: Start difference. First operand 3086 states and 4843 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:02:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:35,144 INFO L93 Difference]: Finished difference Result 6211 states and 9938 transitions. [2022-11-03 04:02:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:35,145 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2022-11-03 04:02:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:35,170 INFO L225 Difference]: With dead ends: 6211 [2022-11-03 04:02:35,171 INFO L226 Difference]: Without dead ends: 3140 [2022-11-03 04:02:35,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:35,203 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 85 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:35,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1689 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2022-11-03 04:02:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3140. [2022-11-03 04:02:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2253 states have (on average 1.486462494451842) internal successors, (3349), 2329 states have internal predecessors, (3349), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-03 04:02:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4897 transitions. [2022-11-03 04:02:35,560 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4897 transitions. Word has length 99 [2022-11-03 04:02:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:35,561 INFO L495 AbstractCegarLoop]: Abstraction has 3140 states and 4897 transitions. [2022-11-03 04:02:35,562 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:02:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4897 transitions. [2022-11-03 04:02:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 04:02:35,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:35,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:35,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:35,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 04:02:35,783 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash 392584210, now seen corresponding path program 1 times [2022-11-03 04:02:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:35,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030982824] [2022-11-03 04:02:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:35,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:36,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:36,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030982824] [2022-11-03 04:02:36,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030982824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:36,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560555819] [2022-11-03 04:02:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:36,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:36,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:36,069 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:36,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:02:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:36,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:02:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:02:36,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:36,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560555819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:36,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:36,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-03 04:02:36,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433659886] [2022-11-03 04:02:36,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:36,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:36,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:36,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:36,599 INFO L87 Difference]: Start difference. First operand 3140 states and 4897 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:02:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:37,083 INFO L93 Difference]: Finished difference Result 6292 states and 9956 transitions. [2022-11-03 04:02:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 101 [2022-11-03 04:02:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:37,109 INFO L225 Difference]: With dead ends: 6292 [2022-11-03 04:02:37,110 INFO L226 Difference]: Without dead ends: 3131 [2022-11-03 04:02:37,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:37,138 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 91 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:37,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1685 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:02:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-11-03 04:02:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2022-11-03 04:02:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2244 states have (on average 1.4763814616755793) internal successors, (3313), 2320 states have internal predecessors, (3313), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2022-11-03 04:02:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4861 transitions. [2022-11-03 04:02:37,461 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4861 transitions. Word has length 101 [2022-11-03 04:02:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:37,463 INFO L495 AbstractCegarLoop]: Abstraction has 3131 states and 4861 transitions. [2022-11-03 04:02:37,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:02:37,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4861 transitions. [2022-11-03 04:02:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 04:02:37,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:37,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:37,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:37,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:37,685 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1194234044, now seen corresponding path program 1 times [2022-11-03 04:02:37,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:37,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132957215] [2022-11-03 04:02:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:02:38,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:38,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132957215] [2022-11-03 04:02:38,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132957215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:38,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393858553] [2022-11-03 04:02:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:38,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:38,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:38,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:02:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:02:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:02:38,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:38,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393858553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:38,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:38,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-03 04:02:38,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043724218] [2022-11-03 04:02:38,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:38,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:38,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:38,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:38,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:02:38,614 INFO L87 Difference]: Start difference. First operand 3131 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 04:02:40,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:40,248 INFO L93 Difference]: Finished difference Result 8109 states and 13165 transitions. [2022-11-03 04:02:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:40,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-03 04:02:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:40,293 INFO L225 Difference]: With dead ends: 8109 [2022-11-03 04:02:40,294 INFO L226 Difference]: Without dead ends: 4993 [2022-11-03 04:02:40,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:02:40,324 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 619 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:40,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 2000 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 04:02:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-11-03 04:02:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4931. [2022-11-03 04:02:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3556 states have (on average 1.4569741282339708) internal successors, (5181), 3678 states have internal predecessors, (5181), 1011 states have call successors, (1011), 324 states have call predecessors, (1011), 363 states have return successors, (1624), 1022 states have call predecessors, (1624), 994 states have call successors, (1624) [2022-11-03 04:02:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7816 transitions. [2022-11-03 04:02:40,889 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7816 transitions. Word has length 102 [2022-11-03 04:02:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:40,889 INFO L495 AbstractCegarLoop]: Abstraction has 4931 states and 7816 transitions. [2022-11-03 04:02:40,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 04:02:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7816 transitions. [2022-11-03 04:02:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 04:02:40,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:40,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:40,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:41,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:41,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1329618626, now seen corresponding path program 1 times [2022-11-03 04:02:41,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:41,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729975385] [2022-11-03 04:02:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:41,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:41,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:41,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729975385] [2022-11-03 04:02:41,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729975385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:41,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831096092] [2022-11-03 04:02:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:41,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:41,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:41,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:41,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:02:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:02:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:02:42,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:42,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831096092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:42,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:42,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-03 04:02:42,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519796938] [2022-11-03 04:02:42,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:42,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:02:42,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:42,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:02:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:02:42,046 INFO L87 Difference]: Start difference. First operand 4931 states and 7816 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 04:02:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:43,616 INFO L93 Difference]: Finished difference Result 11020 states and 18004 transitions. [2022-11-03 04:02:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:43,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2022-11-03 04:02:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:43,683 INFO L225 Difference]: With dead ends: 11020 [2022-11-03 04:02:43,683 INFO L226 Difference]: Without dead ends: 6104 [2022-11-03 04:02:43,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:02:43,720 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 700 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:43,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 3257 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 04:02:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2022-11-03 04:02:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 6080. [2022-11-03 04:02:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4412 states have (on average 1.4320036264732547) internal successors, (6318), 4548 states have internal predecessors, (6318), 1174 states have call successors, (1174), 449 states have call predecessors, (1174), 493 states have return successors, (2598), 1175 states have call predecessors, (2598), 1145 states have call successors, (2598) [2022-11-03 04:02:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 10090 transitions. [2022-11-03 04:02:44,375 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 10090 transitions. Word has length 103 [2022-11-03 04:02:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:44,375 INFO L495 AbstractCegarLoop]: Abstraction has 6080 states and 10090 transitions. [2022-11-03 04:02:44,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 04:02:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 10090 transitions. [2022-11-03 04:02:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 04:02:44,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:44,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:44,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:44,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 04:02:44,606 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1259941590, now seen corresponding path program 1 times [2022-11-03 04:02:44,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:44,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511246042] [2022-11-03 04:02:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:44,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:02:44,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:44,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511246042] [2022-11-03 04:02:44,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511246042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:44,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578276468] [2022-11-03 04:02:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:44,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:44,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:44,786 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:44,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:02:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:45,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:02:45,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:02:45,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:45,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578276468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:45,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:45,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-03 04:02:45,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328889014] [2022-11-03 04:02:45,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:45,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:45,200 INFO L87 Difference]: Start difference. First operand 6080 states and 10090 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:02:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:45,970 INFO L93 Difference]: Finished difference Result 11905 states and 20369 transitions. [2022-11-03 04:02:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:02:45,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 108 [2022-11-03 04:02:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:46,029 INFO L225 Difference]: With dead ends: 11905 [2022-11-03 04:02:46,030 INFO L226 Difference]: Without dead ends: 5678 [2022-11-03 04:02:46,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:46,110 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 5 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:46,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1189 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-11-03 04:02:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5479. [2022-11-03 04:02:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 3922 states have (on average 1.4280979092299848) internal successors, (5601), 4050 states have internal predecessors, (5601), 1109 states have call successors, (1109), 413 states have call predecessors, (1109), 447 states have return successors, (2203), 1108 states have call predecessors, (2203), 1084 states have call successors, (2203) [2022-11-03 04:02:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 8913 transitions. [2022-11-03 04:02:46,671 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 8913 transitions. Word has length 108 [2022-11-03 04:02:46,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:46,672 INFO L495 AbstractCegarLoop]: Abstraction has 5479 states and 8913 transitions. [2022-11-03 04:02:46,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:02:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 8913 transitions. [2022-11-03 04:02:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:02:46,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:46,677 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:02:46,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:46,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:46,902 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:46,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1709104290, now seen corresponding path program 1 times [2022-11-03 04:02:46,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:46,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692626880] [2022-11-03 04:02:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 04:02:47,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:47,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692626880] [2022-11-03 04:02:47,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692626880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:47,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200611952] [2022-11-03 04:02:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:47,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:47,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:47,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:47,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:02:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:47,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:02:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:02:47,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:02:47,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200611952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:47,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804006719] [2022-11-03 04:02:47,881 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2022-11-03 04:02:47,882 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:47,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:47,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:47,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:02:55,128 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-03 04:02:57,068 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-03 04:02:57,146 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-11-03 04:03:00,509 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-11-03 04:03:09,135 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-11-03 04:03:09,902 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:03:22,290 WARN L234 SmtUtils]: Spent 7.44s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:03:31,084 WARN L234 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:03:52,033 WARN L234 SmtUtils]: Spent 11.03s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:04:08,968 WARN L234 SmtUtils]: Spent 16.48s on a formula simplification. DAG size of input: 844 DAG size of output: 752 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:04:41,759 WARN L234 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 612 DAG size of output: 584 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:04:47,839 WARN L234 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 621 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:04:47,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1804006719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:47,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:04:47,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 6, 7] total 32 [2022-11-03 04:04:47,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508876028] [2022-11-03 04:04:47,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:47,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 04:04:47,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:47,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 04:04:47,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-11-03 04:04:47,853 INFO L87 Difference]: Start difference. First operand 5479 states and 8913 transitions. Second operand has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-03 04:05:04,504 WARN L234 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 679 DAG size of output: 547 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:05:16,285 WARN L234 SmtUtils]: Spent 11.38s on a formula simplification. DAG size of input: 752 DAG size of output: 559 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:05:22,384 WARN L234 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 594 DAG size of output: 576 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:05:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:52,483 INFO L93 Difference]: Finished difference Result 10981 states and 17875 transitions. [2022-11-03 04:05:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 04:05:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 110 [2022-11-03 04:05:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:52,523 INFO L225 Difference]: With dead ends: 10981 [2022-11-03 04:05:52,524 INFO L226 Difference]: Without dead ends: 5525 [2022-11-03 04:05:52,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 130.7s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 04:05:52,574 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 39 mSDsluCounter, 3854 mSDsCounter, 0 mSdLazyCounter, 4402 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 4400 SdHoareTripleChecker+Invalid, 4419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:52,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 4400 Invalid, 4419 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 4402 Invalid, 0 Unknown, 0 Unchecked, 31.2s Time] [2022-11-03 04:05:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2022-11-03 04:05:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5499. [2022-11-03 04:05:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3938 states have (on average 1.4268664296597258) internal successors, (5619), 4065 states have internal predecessors, (5619), 1111 states have call successors, (1111), 415 states have call predecessors, (1111), 449 states have return successors, (2205), 1111 states have call predecessors, (2205), 1086 states have call successors, (2205) [2022-11-03 04:05:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 8935 transitions. [2022-11-03 04:05:53,248 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 8935 transitions. Word has length 110 [2022-11-03 04:05:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:53,249 INFO L495 AbstractCegarLoop]: Abstraction has 5499 states and 8935 transitions. [2022-11-03 04:05:53,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-03 04:05:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 8935 transitions. [2022-11-03 04:05:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 04:05:53,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:53,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:05:53,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:53,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 04:05:53,486 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:53,487 INFO L85 PathProgramCache]: Analyzing trace with hash -710375837, now seen corresponding path program 1 times [2022-11-03 04:05:53,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:53,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823930897] [2022-11-03 04:05:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:53,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:05:53,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:53,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823930897] [2022-11-03 04:05:53,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823930897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:05:53,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328118269] [2022-11-03 04:05:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:53,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:53,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:53,809 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:53,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 04:05:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:05:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 04:05:54,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:05:54,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328118269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:54,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:05:54,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-03 04:05:54,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867690932] [2022-11-03 04:05:54,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:54,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:54,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:54,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:05:54,267 INFO L87 Difference]: Start difference. First operand 5499 states and 8935 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:05:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:55,622 INFO L93 Difference]: Finished difference Result 11386 states and 19601 transitions. [2022-11-03 04:05:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:05:55,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 112 [2022-11-03 04:05:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:55,675 INFO L225 Difference]: With dead ends: 11386 [2022-11-03 04:05:55,675 INFO L226 Difference]: Without dead ends: 6539 [2022-11-03 04:05:55,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:05:55,733 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 252 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:55,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 2574 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:05:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2022-11-03 04:05:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6323. [2022-11-03 04:05:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 4401 states have (on average 1.4314928425357873) internal successors, (6300), 4639 states have internal predecessors, (6300), 1454 states have call successors, (1454), 415 states have call predecessors, (1454), 467 states have return successors, (2858), 1433 states have call predecessors, (2858), 1429 states have call successors, (2858) [2022-11-03 04:05:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10612 transitions. [2022-11-03 04:05:56,542 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10612 transitions. Word has length 112 [2022-11-03 04:05:56,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:56,543 INFO L495 AbstractCegarLoop]: Abstraction has 6323 states and 10612 transitions. [2022-11-03 04:05:56,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 04:05:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10612 transitions. [2022-11-03 04:05:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 04:05:56,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:56,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:05:56,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:56,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 04:05:56,775 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:56,775 INFO L85 PathProgramCache]: Analyzing trace with hash -246584639, now seen corresponding path program 1 times [2022-11-03 04:05:56,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:56,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644351408] [2022-11-03 04:05:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:56,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:05:57,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644351408] [2022-11-03 04:05:57,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644351408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:05:57,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340117534] [2022-11-03 04:05:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:57,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:57,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:57,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:57,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 04:05:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:57,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:05:57,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:05:57,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:05:57,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340117534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:57,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856459695] [2022-11-03 04:05:57,858 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-11-03 04:05:57,858 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:05:57,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:05:57,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:05:57,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:06:02,905 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-03 04:07:19,758 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 461 for LOIs [2022-11-03 04:07:20,010 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 451 for LOIs [2022-11-03 04:07:20,136 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 457 for LOIs [2022-11-03 04:07:20,262 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 86 for LOIs [2022-11-03 04:07:20,378 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 81 for LOIs [2022-11-03 04:07:20,388 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-11-03 04:07:20,512 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2022-11-03 04:07:23,416 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 788 for LOIs [2022-11-03 04:07:39,351 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2022-11-03 04:07:39,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:07:52,988 WARN L234 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:02,446 WARN L234 SmtUtils]: Spent 8.76s on a formula simplification. DAG size of input: 677 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:24,084 WARN L234 SmtUtils]: Spent 11.07s on a formula simplification. DAG size of input: 788 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:08:43,019 WARN L234 SmtUtils]: Spent 18.46s on a formula simplification. DAG size of input: 865 DAG size of output: 746 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:09:16,435 WARN L234 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 612 DAG size of output: 584 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:09:22,521 WARN L234 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 621 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:09:41,391 WARN L234 SmtUtils]: Spent 9.65s on a formula simplification. DAG size of input: 685 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:09:52,264 WARN L234 SmtUtils]: Spent 9.45s on a formula simplification. DAG size of input: 688 DAG size of output: 622 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:10:03,249 WARN L234 SmtUtils]: Spent 9.36s on a formula simplification. DAG size of input: 683 DAG size of output: 613 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:10:22,278 WARN L234 SmtUtils]: Spent 9.93s on a formula simplification. DAG size of input: 694 DAG size of output: 608 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:10:33,457 WARN L234 SmtUtils]: Spent 9.30s on a formula simplification. DAG size of input: 703 DAG size of output: 609 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:10:45,375 WARN L234 SmtUtils]: Spent 9.78s on a formula simplification. DAG size of input: 712 DAG size of output: 613 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:10:56,757 WARN L234 SmtUtils]: Spent 9.13s on a formula simplification. DAG size of input: 717 DAG size of output: 615 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:11:07,722 WARN L234 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 716 DAG size of output: 614 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:11:26,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1856459695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:26,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:11:26,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [5, 6, 7] total 57 [2022-11-03 04:11:26,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693065574] [2022-11-03 04:11:26,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:26,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-03 04:11:26,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:11:26,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-03 04:11:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 04:11:26,849 INFO L87 Difference]: Start difference. First operand 6323 states and 10612 transitions. Second operand has 45 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 04:11:43,395 WARN L234 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 679 DAG size of output: 547 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:11:54,243 WARN L234 SmtUtils]: Spent 10.36s on a formula simplification. DAG size of input: 746 DAG size of output: 558 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:12:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:50,658 INFO L93 Difference]: Finished difference Result 12663 states and 21270 transitions. [2022-11-03 04:12:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 04:12:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) Word has length 117 [2022-11-03 04:12:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:50,702 INFO L225 Difference]: With dead ends: 12663 [2022-11-03 04:12:50,702 INFO L226 Difference]: Without dead ends: 6377 [2022-11-03 04:12:50,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 296 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 257.8s TimeCoverageRelationStatistics Valid=330, Invalid=3452, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 04:12:50,755 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 55 mSDsluCounter, 7783 mSDsCounter, 0 mSdLazyCounter, 10551 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 8282 SdHoareTripleChecker+Invalid, 10567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 10551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:50,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 8282 Invalid, 10567 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [16 Valid, 10551 Invalid, 0 Unknown, 0 Unchecked, 52.1s Time] [2022-11-03 04:12:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6377 states. [2022-11-03 04:12:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6377 to 6337. [2022-11-03 04:12:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6337 states, 4409 states have (on average 1.4304831027443865) internal successors, (6307), 4648 states have internal predecessors, (6307), 1456 states have call successors, (1456), 418 states have call predecessors, (1456), 471 states have return successors, (2862), 1435 states have call predecessors, (2862), 1431 states have call successors, (2862) [2022-11-03 04:12:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 10625 transitions. [2022-11-03 04:12:51,548 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 10625 transitions. Word has length 117 [2022-11-03 04:12:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:51,549 INFO L495 AbstractCegarLoop]: Abstraction has 6337 states and 10625 transitions. [2022-11-03 04:12:51,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 28 states have internal predecessors, (72), 13 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 04:12:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 10625 transitions. [2022-11-03 04:12:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 04:12:51,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:51,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:12:51,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:51,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 04:12:51,782 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:51,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:51,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1164924802, now seen corresponding path program 1 times [2022-11-03 04:12:51,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:12:51,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753944172] [2022-11-03 04:12:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:51,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:12:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:12:52,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:12:52,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753944172] [2022-11-03 04:12:52,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753944172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:12:52,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067936118] [2022-11-03 04:12:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:52,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:52,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:52,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 04:12:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:52,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:12:52,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:12:52,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:12:52,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067936118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:52,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915181637] [2022-11-03 04:12:52,651 INFO L159 IcfgInterpreter]: Started Sifa with 100 locations of interest [2022-11-03 04:12:52,651 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:12:52,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:12:52,652 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:12:52,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:12:56,926 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-11-03 04:13:41,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:41,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:41,681 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 04:13:41,683 INFO L158 Benchmark]: Toolchain (without parser) took 685216.05ms. Allocated memory was 96.5MB in the beginning and 2.2GB in the end (delta: 2.1GB). Free memory was 54.1MB in the beginning and 765.4MB in the end (delta: -711.2MB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2022-11-03 04:13:41,683 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 96.5MB. Free memory was 73.2MB in the beginning and 73.1MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:13:41,684 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1206.40ms. Allocated memory is still 96.5MB. Free memory was 54.0MB in the beginning and 45.2MB in the end (delta: 8.8MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2022-11-03 04:13:41,684 INFO L158 Benchmark]: Boogie Procedure Inliner took 185.02ms. Allocated memory was 96.5MB in the beginning and 144.7MB in the end (delta: 48.2MB). Free memory was 45.2MB in the beginning and 118.4MB in the end (delta: -73.2MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2022-11-03 04:13:41,684 INFO L158 Benchmark]: Boogie Preprocessor took 171.75ms. Allocated memory is still 144.7MB. Free memory was 118.4MB in the beginning and 113.8MB in the end (delta: 4.6MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2022-11-03 04:13:41,685 INFO L158 Benchmark]: RCFGBuilder took 2733.10ms. Allocated memory was 144.7MB in the beginning and 201.3MB in the end (delta: 56.6MB). Free memory was 113.8MB in the beginning and 118.4MB in the end (delta: -4.6MB). Peak memory consumption was 95.7MB. Max. memory is 16.1GB. [2022-11-03 04:13:41,685 INFO L158 Benchmark]: TraceAbstraction took 680909.01ms. Allocated memory was 201.3MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 117.4MB in the beginning and 765.4MB in the end (delta: -648.0MB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2022-11-03 04:13:41,688 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 96.5MB. Free memory was 73.2MB in the beginning and 73.1MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1206.40ms. Allocated memory is still 96.5MB. Free memory was 54.0MB in the beginning and 45.2MB in the end (delta: 8.8MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 185.02ms. Allocated memory was 96.5MB in the beginning and 144.7MB in the end (delta: 48.2MB). Free memory was 45.2MB in the beginning and 118.4MB in the end (delta: -73.2MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 171.75ms. Allocated memory is still 144.7MB. Free memory was 118.4MB in the beginning and 113.8MB in the end (delta: 4.6MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. * RCFGBuilder took 2733.10ms. Allocated memory was 144.7MB in the beginning and 201.3MB in the end (delta: 56.6MB). Free memory was 113.8MB in the beginning and 118.4MB in the end (delta: -4.6MB). Peak memory consumption was 95.7MB. Max. memory is 16.1GB. * TraceAbstraction took 680909.01ms. Allocated memory was 201.3MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 117.4MB in the beginning and 765.4MB in the end (delta: -648.0MB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 04:13:41,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/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_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/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 bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece --- 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 04:13:44,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:13:44,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:13:44,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:13:44,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:13:44,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:13:44,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:13:44,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:13:44,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:13:44,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:13:44,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:13:44,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:13:44,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:13:44,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:13:44,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:13:44,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:13:44,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:13:44,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:13:44,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:13:44,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:13:44,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:13:44,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:13:44,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:13:44,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:13:44,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:13:44,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:13:44,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:13:44,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:13:44,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:13:44,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:13:44,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:13:44,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:13:44,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:13:44,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:13:44,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:13:44,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:13:44,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:13:44,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:13:44,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:13:44,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:13:44,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:13:44,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 04:13:44,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:13:44,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:13:44,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:13:44,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:13:44,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:13:44,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:13:44,334 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:13:44,334 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:13:44,334 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:13:44,335 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:13:44,335 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:13:44,336 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:13:44,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:13:44,337 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:13:44,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:13:44,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:13:44,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:13:44,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:13:44,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:13:44,339 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:13:44,339 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:13:44,339 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:13:44,339 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:13:44,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:13:44,340 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:13:44,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:13:44,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:13:44,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:13:44,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:13:44,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:13:44,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:13:44,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:13:44,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:13:44,342 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:13:44,342 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:13:44,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:13:44,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:13:44,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:13:44,343 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f671ffdb-9092-4054-83fa-224e2e2d2093/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3dce9b114483214f320874a7aac06c61be45c777f03f63c22a8ddab1e62ece [2022-11-03 04:13:44,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:13:44,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:13:44,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:13:44,783 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:13:44,783 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:13:44,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2022-11-03 04:13:44,838 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data/3fbc92f75/7d165aab0d0f42d088f4dfe671e14101/FLAGee609311e [2022-11-03 04:13:45,494 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:13:45,498 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c [2022-11-03 04:13:45,527 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data/3fbc92f75/7d165aab0d0f42d088f4dfe671e14101/FLAGee609311e [2022-11-03 04:13:45,651 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/data/3fbc92f75/7d165aab0d0f42d088f4dfe671e14101 [2022-11-03 04:13:45,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:13:45,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:13:45,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:13:45,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:13:45,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:13:45,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:13:45" (1/1) ... [2022-11-03 04:13:45,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a04567f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:45, skipping insertion in model container [2022-11-03 04:13:45,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:13:45" (1/1) ... [2022-11-03 04:13:45,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:13:45,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:13:46,351 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2022-11-03 04:13:46,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:13:46,442 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 04:13:46,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:13:46,556 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_f671ffdb-9092-4054-83fa-224e2e2d2093/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2022-11-03 04:13:46,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:13:46,604 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:13:46,716 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_f671ffdb-9092-4054-83fa-224e2e2d2093/sv-benchmarks/c/product-lines/elevator_spec13_product21.cil.c[58922,58935] [2022-11-03 04:13:46,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:13:46,773 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:13:46,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46 WrapperNode [2022-11-03 04:13:46,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:13:46,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:13:46,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:13:46,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:13:46,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,863 INFO L138 Inliner]: procedures = 92, calls = 338, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 767 [2022-11-03 04:13:46,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:13:46,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:13:46,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:13:46,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:13:46,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,914 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:13:46,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:13:46,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:13:46,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:13:46,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (1/1) ... [2022-11-03 04:13:46,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:13:46,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:13:46,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:13:47,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:13:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-03 04:13:47,034 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-03 04:13:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:13:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-03 04:13:47,035 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-03 04:13:47,035 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 04:13:47,035 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 04:13:47,035 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-11-03 04:13:47,035 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-11-03 04:13:47,035 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 04:13:47,036 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 04:13:47,036 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 04:13:47,036 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 04:13:47,036 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-03 04:13:47,036 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-03 04:13:47,036 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 04:13:47,037 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 04:13:47,037 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 04:13:47,037 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 04:13:47,037 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 04:13:47,037 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 04:13:47,037 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 04:13:47,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 04:13:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 04:13:47,038 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 04:13:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 04:13:47,039 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 04:13:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 04:13:47,039 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 04:13:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 04:13:47,040 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 04:13:47,040 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 04:13:47,040 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 04:13:47,041 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 04:13:47,041 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 04:13:47,041 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 04:13:47,041 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 04:13:47,041 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 04:13:47,041 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 04:13:47,042 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 04:13:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 04:13:47,042 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 04:13:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 04:13:47,042 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 04:13:47,043 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 04:13:47,044 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 04:13:47,044 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 04:13:47,045 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 04:13:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 04:13:47,046 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-03 04:13:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:13:47,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:13:47,046 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 04:13:47,047 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 04:13:47,318 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:13:47,321 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:13:48,973 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:13:48,984 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:13:48,986 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 04:13:48,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:13:48 BoogieIcfgContainer [2022-11-03 04:13:48,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:13:48,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:13:48,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:13:48,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:13:48,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:13:45" (1/3) ... [2022-11-03 04:13:48,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcd62ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:13:48, skipping insertion in model container [2022-11-03 04:13:48,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:13:46" (2/3) ... [2022-11-03 04:13:48,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcd62ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:13:48, skipping insertion in model container [2022-11-03 04:13:48,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:13:48" (3/3) ... [2022-11-03 04:13:49,000 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2022-11-03 04:13:49,020 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:13:49,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:13:49,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:13:49,116 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;@10bc1e71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:13:49,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:13:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 592 states, 465 states have (on average 1.6924731182795698) internal successors, (787), 483 states have internal predecessors, (787), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 04:13:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 04:13:49,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:49,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:49,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:49,179 INFO L85 PathProgramCache]: Analyzing trace with hash -525274672, now seen corresponding path program 1 times [2022-11-03 04:13:49,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:49,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057104301] [2022-11-03 04:13:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:49,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:49,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:49,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:49,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:13:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 04:13:49,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:13:49,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:49,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:49,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057104301] [2022-11-03 04:13:49,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057104301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:49,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:49,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:13:49,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673819778] [2022-11-03 04:13:49,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:49,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 04:13:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 04:13:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 04:13:49,859 INFO L87 Difference]: Start difference. First operand has 592 states, 465 states have (on average 1.6924731182795698) internal successors, (787), 483 states have internal predecessors, (787), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:13:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:50,001 INFO L93 Difference]: Finished difference Result 1162 states and 1957 transitions. [2022-11-03 04:13:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 04:13:50,005 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 114 [2022-11-03 04:13:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:50,037 INFO L225 Difference]: With dead ends: 1162 [2022-11-03 04:13:50,038 INFO L226 Difference]: Without dead ends: 582 [2022-11-03 04:13:50,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 04:13:50,055 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:50,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:13:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-11-03 04:13:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2022-11-03 04:13:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 458 states have (on average 1.6746724890829694) internal successors, (767), 474 states have internal predecessors, (767), 100 states have call successors, (100), 25 states have call predecessors, (100), 23 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 04:13:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 964 transitions. [2022-11-03 04:13:50,216 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 964 transitions. Word has length 114 [2022-11-03 04:13:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:50,218 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 964 transitions. [2022-11-03 04:13:50,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:13:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 964 transitions. [2022-11-03 04:13:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 04:13:50,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:50,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:50,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:50,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:50,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:50,451 INFO L85 PathProgramCache]: Analyzing trace with hash 281689968, now seen corresponding path program 1 times [2022-11-03 04:13:50,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925261946] [2022-11-03 04:13:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:50,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:50,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:50,455 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:50,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:13:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:50,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:13:50,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:13:51,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:51,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:51,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925261946] [2022-11-03 04:13:51,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925261946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:51,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:51,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:13:51,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709485725] [2022-11-03 04:13:51,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:51,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:13:51,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:51,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:13:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:13:51,029 INFO L87 Difference]: Start difference. First operand 582 states and 964 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:13:51,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:51,180 INFO L93 Difference]: Finished difference Result 1160 states and 1928 transitions. [2022-11-03 04:13:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:13:51,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 114 [2022-11-03 04:13:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:51,185 INFO L225 Difference]: With dead ends: 1160 [2022-11-03 04:13:51,186 INFO L226 Difference]: Without dead ends: 586 [2022-11-03 04:13:51,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:13:51,192 INFO L413 NwaCegarLoop]: 949 mSDtfsCounter, 15 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:51,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2838 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:13:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-03 04:13:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2022-11-03 04:13:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 461 states have (on average 1.6702819956616053) internal successors, (770), 477 states have internal predecessors, (770), 100 states have call successors, (100), 26 states have call predecessors, (100), 24 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 04:13:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 967 transitions. [2022-11-03 04:13:51,238 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 967 transitions. Word has length 114 [2022-11-03 04:13:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:51,238 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 967 transitions. [2022-11-03 04:13:51,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:13:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 967 transitions. [2022-11-03 04:13:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 04:13:51,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:51,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:51,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:51,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:51,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1996051294, now seen corresponding path program 1 times [2022-11-03 04:13:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:51,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34762012] [2022-11-03 04:13:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:51,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:51,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:51,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:51,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:13:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:51,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:13:51,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:13:52,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:52,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:52,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34762012] [2022-11-03 04:13:52,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34762012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:52,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:52,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:13:52,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942565002] [2022-11-03 04:13:52,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:52,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:13:52,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:52,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:13:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:13:52,090 INFO L87 Difference]: Start difference. First operand 586 states and 967 transitions. Second operand has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:52,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:52,441 INFO L93 Difference]: Finished difference Result 1184 states and 1959 transitions. [2022-11-03 04:13:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:13:52,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2022-11-03 04:13:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:52,447 INFO L225 Difference]: With dead ends: 1184 [2022-11-03 04:13:52,447 INFO L226 Difference]: Without dead ends: 608 [2022-11-03 04:13:52,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:13:52,474 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 119 mSDsluCounter, 4682 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5641 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:52,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 5641 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:13:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-03 04:13:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 599. [2022-11-03 04:13:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.6666666666666667) internal successors, (785), 489 states have internal predecessors, (785), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2022-11-03 04:13:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 989 transitions. [2022-11-03 04:13:52,507 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 989 transitions. Word has length 116 [2022-11-03 04:13:52,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:52,507 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 989 transitions. [2022-11-03 04:13:52,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 989 transitions. [2022-11-03 04:13:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 04:13:52,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:52,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:52,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:52,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:52,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:52,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1453039279, now seen corresponding path program 1 times [2022-11-03 04:13:52,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:52,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550190878] [2022-11-03 04:13:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:52,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:52,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:52,732 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:52,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:13:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:13:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:13:53,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:53,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550190878] [2022-11-03 04:13:53,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550190878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:53,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:53,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:13:53,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106605084] [2022-11-03 04:13:53,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:53,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:13:53,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:53,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:13:53,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:13:53,246 INFO L87 Difference]: Start difference. First operand 599 states and 989 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:53,667 INFO L93 Difference]: Finished difference Result 1204 states and 1992 transitions. [2022-11-03 04:13:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:13:53,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2022-11-03 04:13:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:53,696 INFO L225 Difference]: With dead ends: 1204 [2022-11-03 04:13:53,697 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 04:13:53,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:13:53,709 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 105 mSDsluCounter, 4718 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5689 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:53,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 5689 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:13:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 04:13:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 599. [2022-11-03 04:13:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 471 states have (on average 1.6666666666666667) internal successors, (785), 489 states have internal predecessors, (785), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2022-11-03 04:13:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 989 transitions. [2022-11-03 04:13:53,770 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 989 transitions. Word has length 117 [2022-11-03 04:13:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:53,772 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 989 transitions. [2022-11-03 04:13:53,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 989 transitions. [2022-11-03 04:13:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 04:13:53,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:53,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:53,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:53,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:53,995 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:53,995 INFO L85 PathProgramCache]: Analyzing trace with hash 819662083, now seen corresponding path program 1 times [2022-11-03 04:13:53,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:53,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89775185] [2022-11-03 04:13:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:53,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:53,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:53,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 04:13:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:13:54,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:13:54,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:54,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89775185] [2022-11-03 04:13:54,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89775185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:54,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:54,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:13:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655546928] [2022-11-03 04:13:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:54,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:13:54,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:54,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:13:54,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:13:54,486 INFO L87 Difference]: Start difference. First operand 599 states and 989 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:13:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:54,601 INFO L93 Difference]: Finished difference Result 1189 states and 1967 transitions. [2022-11-03 04:13:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:13:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2022-11-03 04:13:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:54,608 INFO L225 Difference]: With dead ends: 1189 [2022-11-03 04:13:54,608 INFO L226 Difference]: Without dead ends: 600 [2022-11-03 04:13:54,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:13:54,614 INFO L413 NwaCegarLoop]: 949 mSDtfsCounter, 22 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2838 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:54,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2838 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:13:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-03 04:13:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2022-11-03 04:13:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 473 states have (on average 1.6659619450317125) internal successors, (788), 490 states have internal predecessors, (788), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2022-11-03 04:13:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 987 transitions. [2022-11-03 04:13:54,652 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 987 transitions. Word has length 117 [2022-11-03 04:13:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:54,653 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 987 transitions. [2022-11-03 04:13:54,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:13:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 987 transitions. [2022-11-03 04:13:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 04:13:54,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:54,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:54,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:54,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:54,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1805408949, now seen corresponding path program 1 times [2022-11-03 04:13:54,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:54,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964276991] [2022-11-03 04:13:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:54,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:54,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:54,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:54,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 04:13:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:55,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:13:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:13:55,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:55,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:55,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964276991] [2022-11-03 04:13:55,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964276991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:55,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:55,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:13:55,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214861254] [2022-11-03 04:13:55,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:55,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:13:55,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:13:55,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:13:55,374 INFO L87 Difference]: Start difference. First operand 600 states and 987 transitions. Second operand has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:55,662 INFO L93 Difference]: Finished difference Result 1194 states and 1972 transitions. [2022-11-03 04:13:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:13:55,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 119 [2022-11-03 04:13:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:55,668 INFO L225 Difference]: With dead ends: 1194 [2022-11-03 04:13:55,669 INFO L226 Difference]: Without dead ends: 609 [2022-11-03 04:13:55,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:13:55,674 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 104 mSDsluCounter, 4671 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5633 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:55,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 5633 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:13:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-11-03 04:13:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 600. [2022-11-03 04:13:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 473 states have (on average 1.6659619450317125) internal successors, (788), 490 states have internal predecessors, (788), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2022-11-03 04:13:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 987 transitions. [2022-11-03 04:13:55,702 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 987 transitions. Word has length 119 [2022-11-03 04:13:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:55,703 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 987 transitions. [2022-11-03 04:13:55,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 987 transitions. [2022-11-03 04:13:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 04:13:55,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:55,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:55,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:55,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:55,930 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:55,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1570987814, now seen corresponding path program 1 times [2022-11-03 04:13:55,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:55,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949935976] [2022-11-03 04:13:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:55,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:55,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:55,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 04:13:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:56,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:13:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:13:56,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:56,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:56,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949935976] [2022-11-03 04:13:56,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949935976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:56,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:56,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:13:56,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993636076] [2022-11-03 04:13:56,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:56,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:13:56,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:13:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:13:56,423 INFO L87 Difference]: Start difference. First operand 600 states and 987 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:13:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:56,679 INFO L93 Difference]: Finished difference Result 1214 states and 2010 transitions. [2022-11-03 04:13:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:13:56,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2022-11-03 04:13:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:56,684 INFO L225 Difference]: With dead ends: 1214 [2022-11-03 04:13:56,685 INFO L226 Difference]: Without dead ends: 629 [2022-11-03 04:13:56,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:13:56,690 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 112 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:56,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 2682 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:13:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-03 04:13:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 620. [2022-11-03 04:13:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 492 states have (on average 1.660569105691057) internal successors, (817), 509 states have internal predecessors, (817), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2022-11-03 04:13:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1015 transitions. [2022-11-03 04:13:56,717 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1015 transitions. Word has length 120 [2022-11-03 04:13:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:56,718 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 1015 transitions. [2022-11-03 04:13:56,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:13:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1015 transitions. [2022-11-03 04:13:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 04:13:56,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:56,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:56,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:56,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:56,946 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:56,947 INFO L85 PathProgramCache]: Analyzing trace with hash 916608113, now seen corresponding path program 1 times [2022-11-03 04:13:56,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:56,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717471635] [2022-11-03 04:13:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:56,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:56,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:56,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:56,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 04:13:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:57,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:13:57,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:13:57,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:57,406 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:57,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717471635] [2022-11-03 04:13:57,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717471635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:57,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:57,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:13:57,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829073129] [2022-11-03 04:13:57,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:57,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:13:57,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:57,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:13:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:13:57,409 INFO L87 Difference]: Start difference. First operand 620 states and 1015 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:57,635 INFO L93 Difference]: Finished difference Result 1243 states and 2041 transitions. [2022-11-03 04:13:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:13:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 121 [2022-11-03 04:13:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:57,642 INFO L225 Difference]: With dead ends: 1243 [2022-11-03 04:13:57,642 INFO L226 Difference]: Without dead ends: 638 [2022-11-03 04:13:57,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:13:57,648 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 154 mSDsluCounter, 4599 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5549 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:57,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 5549 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:13:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-11-03 04:13:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 620. [2022-11-03 04:13:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 492 states have (on average 1.660569105691057) internal successors, (817), 509 states have internal predecessors, (817), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2022-11-03 04:13:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1015 transitions. [2022-11-03 04:13:57,676 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1015 transitions. Word has length 121 [2022-11-03 04:13:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:57,676 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 1015 transitions. [2022-11-03 04:13:57,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1015 transitions. [2022-11-03 04:13:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 04:13:57,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:57,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:57,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:57,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:57,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1014266940, now seen corresponding path program 1 times [2022-11-03 04:13:57,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:57,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221904386] [2022-11-03 04:13:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:57,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:57,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:57,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:57,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 04:13:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:58,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:13:58,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:13:58,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:58,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:58,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221904386] [2022-11-03 04:13:58,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221904386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:58,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:58,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:13:58,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589211664] [2022-11-03 04:13:58,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:58,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:13:58,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:58,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:13:58,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:13:58,354 INFO L87 Difference]: Start difference. First operand 620 states and 1015 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:58,675 INFO L93 Difference]: Finished difference Result 1238 states and 2032 transitions. [2022-11-03 04:13:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:13:58,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 122 [2022-11-03 04:13:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:58,681 INFO L225 Difference]: With dead ends: 1238 [2022-11-03 04:13:58,681 INFO L226 Difference]: Without dead ends: 633 [2022-11-03 04:13:58,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:13:58,686 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 112 mSDsluCounter, 5529 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6469 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:58,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 6469 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:13:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-03 04:13:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 624. [2022-11-03 04:13:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 496 states have (on average 1.655241935483871) internal successors, (821), 513 states have internal predecessors, (821), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2022-11-03 04:13:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1019 transitions. [2022-11-03 04:13:58,712 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1019 transitions. Word has length 122 [2022-11-03 04:13:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:58,712 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 1019 transitions. [2022-11-03 04:13:58,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1019 transitions. [2022-11-03 04:13:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 04:13:58,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:58,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:58,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:58,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:13:58,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:58,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1179636911, now seen corresponding path program 1 times [2022-11-03 04:13:58,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:58,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897982636] [2022-11-03 04:13:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:58,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:58,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:58,933 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:58,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 04:13:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:13:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:13:59,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:13:59,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:59,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897982636] [2022-11-03 04:13:59,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897982636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:13:59,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:13:59,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:13:59,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261389138] [2022-11-03 04:13:59,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:13:59,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:13:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:13:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:13:59,418 INFO L87 Difference]: Start difference. First operand 624 states and 1019 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:59,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:59,861 INFO L93 Difference]: Finished difference Result 1248 states and 2044 transitions. [2022-11-03 04:13:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:13:59,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 123 [2022-11-03 04:13:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:59,868 INFO L225 Difference]: With dead ends: 1248 [2022-11-03 04:13:59,868 INFO L226 Difference]: Without dead ends: 639 [2022-11-03 04:13:59,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:13:59,873 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 108 mSDsluCounter, 5535 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6477 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:59,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6477 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:13:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-03 04:13:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 630. [2022-11-03 04:13:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 502 states have (on average 1.6474103585657371) internal successors, (827), 519 states have internal predecessors, (827), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2022-11-03 04:13:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1025 transitions. [2022-11-03 04:13:59,904 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1025 transitions. Word has length 123 [2022-11-03 04:13:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:59,904 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 1025 transitions. [2022-11-03 04:13:59,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:13:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1025 transitions. [2022-11-03 04:13:59,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:13:59,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:59,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:13:59,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:00,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:00,141 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:00,141 INFO L85 PathProgramCache]: Analyzing trace with hash 566463529, now seen corresponding path program 1 times [2022-11-03 04:14:00,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:00,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252151943] [2022-11-03 04:14:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:00,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:00,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:00,144 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:00,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:14:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:00,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:14:00,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:14:00,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:00,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:00,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252151943] [2022-11-03 04:14:00,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252151943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:00,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:00,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:14:00,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869104243] [2022-11-03 04:14:00,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:00,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:14:00,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:00,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:14:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:14:00,666 INFO L87 Difference]: Start difference. First operand 630 states and 1025 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:14:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:01,027 INFO L93 Difference]: Finished difference Result 1262 states and 2060 transitions. [2022-11-03 04:14:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:14:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 124 [2022-11-03 04:14:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:01,032 INFO L225 Difference]: With dead ends: 1262 [2022-11-03 04:14:01,032 INFO L226 Difference]: Without dead ends: 647 [2022-11-03 04:14:01,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:14:01,037 INFO L413 NwaCegarLoop]: 942 mSDtfsCounter, 108 mSDsluCounter, 5535 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6477 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:01,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 6477 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:14:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-03 04:14:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 638. [2022-11-03 04:14:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 510 states have (on average 1.6372549019607843) internal successors, (835), 527 states have internal predecessors, (835), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2022-11-03 04:14:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1033 transitions. [2022-11-03 04:14:01,064 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1033 transitions. Word has length 124 [2022-11-03 04:14:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:01,065 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 1033 transitions. [2022-11-03 04:14:01,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:14:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1033 transitions. [2022-11-03 04:14:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 04:14:01,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:01,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:01,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:01,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:01,290 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1438604566, now seen corresponding path program 1 times [2022-11-03 04:14:01,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:01,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642332220] [2022-11-03 04:14:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:01,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:01,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:01,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:01,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 04:14:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:01,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:14:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 04:14:01,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:01,762 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642332220] [2022-11-03 04:14:01,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642332220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:01,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:01,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:14:01,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008150406] [2022-11-03 04:14:01,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:01,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:14:01,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:14:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:14:01,765 INFO L87 Difference]: Start difference. First operand 638 states and 1033 transitions. Second operand has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:14:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:02,003 INFO L93 Difference]: Finished difference Result 1195 states and 1935 transitions. [2022-11-03 04:14:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:14:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 125 [2022-11-03 04:14:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:02,009 INFO L225 Difference]: With dead ends: 1195 [2022-11-03 04:14:02,009 INFO L226 Difference]: Without dead ends: 650 [2022-11-03 04:14:02,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:14:02,014 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 98 mSDsluCounter, 4654 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 5606 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:02,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 5606 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:14:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-03 04:14:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 645. [2022-11-03 04:14:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 514 states have (on average 1.632295719844358) internal successors, (839), 533 states have internal predecessors, (839), 101 states have call successors, (101), 28 states have call predecessors, (101), 29 states have return successors, (102), 96 states have call predecessors, (102), 98 states have call successors, (102) [2022-11-03 04:14:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1042 transitions. [2022-11-03 04:14:02,047 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1042 transitions. Word has length 125 [2022-11-03 04:14:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:02,048 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 1042 transitions. [2022-11-03 04:14:02,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:14:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1042 transitions. [2022-11-03 04:14:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 04:14:02,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:02,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:02,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:02,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:02,266 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:02,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1734455383, now seen corresponding path program 1 times [2022-11-03 04:14:02,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:02,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032938477] [2022-11-03 04:14:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:02,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:02,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:02,269 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:02,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 04:14:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:14:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:14:02,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:02,707 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:02,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032938477] [2022-11-03 04:14:02,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032938477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:02,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:02,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:14:02,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497714767] [2022-11-03 04:14:02,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:02,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:14:02,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:02,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:14:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:14:02,709 INFO L87 Difference]: Start difference. First operand 645 states and 1042 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:14:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:02,790 INFO L93 Difference]: Finished difference Result 1259 states and 2040 transitions. [2022-11-03 04:14:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:14:02,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 126 [2022-11-03 04:14:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:02,795 INFO L225 Difference]: With dead ends: 1259 [2022-11-03 04:14:02,795 INFO L226 Difference]: Without dead ends: 627 [2022-11-03 04:14:02,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:14:02,799 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 24 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2837 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:02,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2837 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:14:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-11-03 04:14:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2022-11-03 04:14:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 499 states have (on average 1.6272545090180361) internal successors, (812), 516 states have internal predecessors, (812), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2022-11-03 04:14:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1010 transitions. [2022-11-03 04:14:02,822 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1010 transitions. Word has length 126 [2022-11-03 04:14:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:02,823 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 1010 transitions. [2022-11-03 04:14:02,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:14:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1010 transitions. [2022-11-03 04:14:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 04:14:02,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:02,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:02,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:03,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:03,042 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:03,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1493422036, now seen corresponding path program 1 times [2022-11-03 04:14:03,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:03,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564424962] [2022-11-03 04:14:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:03,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:03,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:03,045 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:03,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:14:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:03,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:14:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 04:14:03,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:03,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:03,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564424962] [2022-11-03 04:14:03,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564424962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:03,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:03,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:14:03,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759541255] [2022-11-03 04:14:03,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:03,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:14:03,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:03,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:14:03,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:14:03,502 INFO L87 Difference]: Start difference. First operand 627 states and 1010 transitions. Second operand has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:14:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:03,718 INFO L93 Difference]: Finished difference Result 1178 states and 1903 transitions. [2022-11-03 04:14:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:14:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2022-11-03 04:14:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:03,723 INFO L225 Difference]: With dead ends: 1178 [2022-11-03 04:14:03,724 INFO L226 Difference]: Without dead ends: 621 [2022-11-03 04:14:03,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:14:03,727 INFO L413 NwaCegarLoop]: 932 mSDtfsCounter, 87 mSDsluCounter, 4568 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 5500 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:03,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 5500 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:14:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-03 04:14:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 618. [2022-11-03 04:14:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 490 states have (on average 1.6244897959183673) internal successors, (796), 507 states have internal predecessors, (796), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2022-11-03 04:14:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 994 transitions. [2022-11-03 04:14:03,752 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 994 transitions. Word has length 127 [2022-11-03 04:14:03,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:03,752 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 994 transitions. [2022-11-03 04:14:03,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:14:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 994 transitions. [2022-11-03 04:14:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 04:14:03,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:03,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:03,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:03,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:03,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:03,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1685221104, now seen corresponding path program 1 times [2022-11-03 04:14:03,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:03,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738569192] [2022-11-03 04:14:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:03,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:03,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:03,979 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:03,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 04:14:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:04,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:14:04,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 04:14:04,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:04,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:04,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738569192] [2022-11-03 04:14:04,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738569192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:04,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:04,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 04:14:04,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076162858] [2022-11-03 04:14:04,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:04,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:14:04,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:04,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:14:04,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:14:04,484 INFO L87 Difference]: Start difference. First operand 618 states and 994 transitions. Second operand has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:14:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:04,707 INFO L93 Difference]: Finished difference Result 1169 states and 1887 transitions. [2022-11-03 04:14:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:14:04,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2022-11-03 04:14:04,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:04,712 INFO L225 Difference]: With dead ends: 1169 [2022-11-03 04:14:04,712 INFO L226 Difference]: Without dead ends: 608 [2022-11-03 04:14:04,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:14:04,717 INFO L413 NwaCegarLoop]: 924 mSDtfsCounter, 99 mSDsluCounter, 4512 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 5436 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:04,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 5436 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:14:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-03 04:14:04,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 605. [2022-11-03 04:14:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 477 states have (on average 1.6079664570230607) internal successors, (767), 494 states have internal predecessors, (767), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 04:14:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 964 transitions. [2022-11-03 04:14:04,738 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 964 transitions. Word has length 127 [2022-11-03 04:14:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:04,739 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 964 transitions. [2022-11-03 04:14:04,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 04:14:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 964 transitions. [2022-11-03 04:14:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 04:14:04,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:04,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:04,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:04,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:04,963 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1682333171, now seen corresponding path program 1 times [2022-11-03 04:14:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:04,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261647489] [2022-11-03 04:14:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:04,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:04,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:04,967 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:04,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 04:14:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:05,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:14:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:14:05,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:05,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261647489] [2022-11-03 04:14:05,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261647489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:05,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:05,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:14:05,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280816074] [2022-11-03 04:14:05,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:05,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:14:05,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:14:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:14:05,484 INFO L87 Difference]: Start difference. First operand 605 states and 964 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:14:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:05,674 INFO L93 Difference]: Finished difference Result 1220 states and 1944 transitions. [2022-11-03 04:14:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:14:05,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 129 [2022-11-03 04:14:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:05,680 INFO L225 Difference]: With dead ends: 1220 [2022-11-03 04:14:05,681 INFO L226 Difference]: Without dead ends: 605 [2022-11-03 04:14:05,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:14:05,685 INFO L413 NwaCegarLoop]: 893 mSDtfsCounter, 76 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2650 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:05,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 2650 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:14:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-11-03 04:14:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2022-11-03 04:14:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 477 states have (on average 1.5911949685534592) internal successors, (759), 493 states have internal predecessors, (759), 100 states have call successors, (100), 29 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 04:14:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 956 transitions. [2022-11-03 04:14:05,714 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 956 transitions. Word has length 129 [2022-11-03 04:14:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:05,715 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 956 transitions. [2022-11-03 04:14:05,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:14:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 956 transitions. [2022-11-03 04:14:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 04:14:05,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:05,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:05,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:05,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:05,946 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash -559226990, now seen corresponding path program 1 times [2022-11-03 04:14:05,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:05,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300499356] [2022-11-03 04:14:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:05,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:05,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:05,949 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:05,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:14:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:14:06,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 04:14:06,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:06,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:06,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300499356] [2022-11-03 04:14:06,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300499356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:06,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:06,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:14:06,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223096758] [2022-11-03 04:14:06,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:06,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:14:06,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:06,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:14:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:14:06,750 INFO L87 Difference]: Start difference. First operand 605 states and 956 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:14:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:07,819 INFO L93 Difference]: Finished difference Result 1680 states and 2724 transitions. [2022-11-03 04:14:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:14:07,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 130 [2022-11-03 04:14:07,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:07,828 INFO L225 Difference]: With dead ends: 1680 [2022-11-03 04:14:07,828 INFO L226 Difference]: Without dead ends: 1139 [2022-11-03 04:14:07,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:14:07,832 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 888 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:07,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 2619 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:14:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-11-03 04:14:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1074. [2022-11-03 04:14:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 857 states have (on average 1.619603267211202) internal successors, (1388), 881 states have internal predecessors, (1388), 171 states have call successors, (171), 48 states have call predecessors, (171), 45 states have return successors, (172), 158 states have call predecessors, (172), 167 states have call successors, (172) [2022-11-03 04:14:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1731 transitions. [2022-11-03 04:14:07,898 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1731 transitions. Word has length 130 [2022-11-03 04:14:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:07,898 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1731 transitions. [2022-11-03 04:14:07,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:14:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1731 transitions. [2022-11-03 04:14:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 04:14:07,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:07,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:07,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:08,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:08,125 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:08,126 INFO L85 PathProgramCache]: Analyzing trace with hash 133105036, now seen corresponding path program 1 times [2022-11-03 04:14:08,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:08,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022078689] [2022-11-03 04:14:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:08,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:08,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:08,127 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:08,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 04:14:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:14:08,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:14:08,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 04:14:09,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:09,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022078689] [2022-11-03 04:14:09,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022078689] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:14:09,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:14:09,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2022-11-03 04:14:09,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223830174] [2022-11-03 04:14:09,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:09,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:14:09,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:14:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:14:09,112 INFO L87 Difference]: Start difference. First operand 1074 states and 1731 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 04:14:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:13,150 INFO L93 Difference]: Finished difference Result 3502 states and 5891 transitions. [2022-11-03 04:14:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:14:13,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 131 [2022-11-03 04:14:13,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:13,190 INFO L225 Difference]: With dead ends: 3502 [2022-11-03 04:14:13,190 INFO L226 Difference]: Without dead ends: 2492 [2022-11-03 04:14:13,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:14:13,197 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 2502 mSDsluCounter, 3393 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2609 SdHoareTripleChecker+Valid, 4553 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:13,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2609 Valid, 4553 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 04:14:13,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-11-03 04:14:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2012. [2022-11-03 04:14:13,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 1602 states have (on average 1.6448189762796503) internal successors, (2635), 1650 states have internal predecessors, (2635), 324 states have call successors, (324), 84 states have call predecessors, (324), 85 states have return successors, (383), 305 states have call predecessors, (383), 318 states have call successors, (383) [2022-11-03 04:14:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 3342 transitions. [2022-11-03 04:14:13,354 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 3342 transitions. Word has length 131 [2022-11-03 04:14:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:13,355 INFO L495 AbstractCegarLoop]: Abstraction has 2012 states and 3342 transitions. [2022-11-03 04:14:13,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 04:14:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 3342 transitions. [2022-11-03 04:14:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 04:14:13,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:13,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:13,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:13,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:13,575 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1132247174, now seen corresponding path program 1 times [2022-11-03 04:14:13,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:13,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691180946] [2022-11-03 04:14:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:13,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:13,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:13,578 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:13,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 04:14:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:14:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 04:14:14,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:14,194 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:14,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691180946] [2022-11-03 04:14:14,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691180946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:14,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:14,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:14:14,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145737538] [2022-11-03 04:14:14,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:14,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:14:14,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:14,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:14:14,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:14:14,196 INFO L87 Difference]: Start difference. First operand 2012 states and 3342 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:14:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:15,468 INFO L93 Difference]: Finished difference Result 5727 states and 9666 transitions. [2022-11-03 04:14:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:14:15,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 132 [2022-11-03 04:14:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:15,491 INFO L225 Difference]: With dead ends: 5727 [2022-11-03 04:14:15,491 INFO L226 Difference]: Without dead ends: 3779 [2022-11-03 04:14:15,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:14:15,506 INFO L413 NwaCegarLoop]: 1129 mSDtfsCounter, 766 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 3117 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:15,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 3117 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:14:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2022-11-03 04:14:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3759. [2022-11-03 04:14:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 2980 states have (on average 1.6251677852348994) internal successors, (4843), 3074 states have internal predecessors, (4843), 615 states have call successors, (615), 166 states have call predecessors, (615), 163 states have return successors, (735), 570 states have call predecessors, (735), 605 states have call successors, (735) [2022-11-03 04:14:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 6193 transitions. [2022-11-03 04:14:15,857 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 6193 transitions. Word has length 132 [2022-11-03 04:14:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:15,857 INFO L495 AbstractCegarLoop]: Abstraction has 3759 states and 6193 transitions. [2022-11-03 04:14:15,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 04:14:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 6193 transitions. [2022-11-03 04:14:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-03 04:14:15,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:15,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:15,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:16,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:16,082 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:16,082 INFO L85 PathProgramCache]: Analyzing trace with hash 532665384, now seen corresponding path program 1 times [2022-11-03 04:14:16,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:16,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383618360] [2022-11-03 04:14:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:16,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:16,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:16,083 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:16,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 04:14:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:14:16,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 04:14:16,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:16,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:16,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383618360] [2022-11-03 04:14:16,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383618360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:16,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:16,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:14:16,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420248705] [2022-11-03 04:14:16,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:16,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:14:16,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:14:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:14:16,631 INFO L87 Difference]: Start difference. First operand 3759 states and 6193 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:18,541 INFO L93 Difference]: Finished difference Result 10847 states and 18551 transitions. [2022-11-03 04:14:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:14:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 138 [2022-11-03 04:14:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:18,589 INFO L225 Difference]: With dead ends: 10847 [2022-11-03 04:14:18,589 INFO L226 Difference]: Without dead ends: 7152 [2022-11-03 04:14:18,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:14:18,608 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 1207 mSDsluCounter, 3940 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 5114 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:18,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 5114 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 04:14:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2022-11-03 04:14:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 5692. [2022-11-03 04:14:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 4489 states have (on average 1.6126085987970595) internal successors, (7239), 4641 states have internal predecessors, (7239), 944 states have call successors, (944), 254 states have call predecessors, (944), 258 states have return successors, (1235), 898 states have call predecessors, (1235), 930 states have call successors, (1235) [2022-11-03 04:14:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9418 transitions. [2022-11-03 04:14:19,128 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9418 transitions. Word has length 138 [2022-11-03 04:14:19,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:19,129 INFO L495 AbstractCegarLoop]: Abstraction has 5692 states and 9418 transitions. [2022-11-03 04:14:19,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9418 transitions. [2022-11-03 04:14:19,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 04:14:19,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:19,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:19,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:19,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:19,347 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash 981219907, now seen corresponding path program 1 times [2022-11-03 04:14:19,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:19,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899162495] [2022-11-03 04:14:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:19,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:19,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:19,350 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:19,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 04:14:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:19,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:14:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 04:14:19,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:19,938 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:19,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899162495] [2022-11-03 04:14:19,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899162495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:19,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:19,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:14:19,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679776566] [2022-11-03 04:14:19,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:19,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:14:19,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:19,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:14:19,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:14:19,940 INFO L87 Difference]: Start difference. First operand 5692 states and 9418 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:20,647 INFO L93 Difference]: Finished difference Result 15162 states and 25887 transitions. [2022-11-03 04:14:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:14:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 139 [2022-11-03 04:14:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:20,719 INFO L225 Difference]: With dead ends: 15162 [2022-11-03 04:14:20,719 INFO L226 Difference]: Without dead ends: 9534 [2022-11-03 04:14:20,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:14:20,760 INFO L413 NwaCegarLoop]: 1060 mSDtfsCounter, 841 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:20,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 1902 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:14:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9534 states. [2022-11-03 04:14:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9534 to 9530. [2022-11-03 04:14:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9530 states, 7487 states have (on average 1.6061172699345532) internal successors, (12025), 7755 states have internal predecessors, (12025), 1606 states have call successors, (1606), 430 states have call predecessors, (1606), 436 states have return successors, (2426), 1546 states have call predecessors, (2426), 1584 states have call successors, (2426) [2022-11-03 04:14:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9530 states to 9530 states and 16057 transitions. [2022-11-03 04:14:21,745 INFO L78 Accepts]: Start accepts. Automaton has 9530 states and 16057 transitions. Word has length 139 [2022-11-03 04:14:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:21,746 INFO L495 AbstractCegarLoop]: Abstraction has 9530 states and 16057 transitions. [2022-11-03 04:14:21,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 9530 states and 16057 transitions. [2022-11-03 04:14:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 04:14:21,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:21,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:21,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:22,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:22,003 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:22,004 INFO L85 PathProgramCache]: Analyzing trace with hash 365078501, now seen corresponding path program 1 times [2022-11-03 04:14:22,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:22,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758946156] [2022-11-03 04:14:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:22,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:22,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:22,005 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:22,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:14:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:14:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 04:14:22,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:22,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758946156] [2022-11-03 04:14:22,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758946156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:22,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:22,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:14:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307858842] [2022-11-03 04:14:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:22,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:14:22,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:22,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:14:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:14:22,720 INFO L87 Difference]: Start difference. First operand 9530 states and 16057 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:24,195 INFO L93 Difference]: Finished difference Result 26696 states and 47307 transitions. [2022-11-03 04:14:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:14:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 140 [2022-11-03 04:14:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:24,320 INFO L225 Difference]: With dead ends: 26696 [2022-11-03 04:14:24,321 INFO L226 Difference]: Without dead ends: 17230 [2022-11-03 04:14:24,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:14:24,402 INFO L413 NwaCegarLoop]: 1062 mSDtfsCounter, 840 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:24,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 1913 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:14:24,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17230 states. [2022-11-03 04:14:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17230 to 17226. [2022-11-03 04:14:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17226 states, 13499 states have (on average 1.6015260389658492) internal successors, (21619), 13999 states have internal predecessors, (21619), 2934 states have call successors, (2934), 782 states have call predecessors, (2934), 792 states have return successors, (5469), 2846 states have call predecessors, (5469), 2896 states have call successors, (5469) [2022-11-03 04:14:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17226 states to 17226 states and 30022 transitions. [2022-11-03 04:14:26,373 INFO L78 Accepts]: Start accepts. Automaton has 17226 states and 30022 transitions. Word has length 140 [2022-11-03 04:14:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:26,374 INFO L495 AbstractCegarLoop]: Abstraction has 17226 states and 30022 transitions. [2022-11-03 04:14:26,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 17226 states and 30022 transitions. [2022-11-03 04:14:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 04:14:26,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:26,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:26,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 04:14:26,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:26,604 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:26,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1536830750, now seen corresponding path program 1 times [2022-11-03 04:14:26,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:26,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549583370] [2022-11-03 04:14:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:26,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:26,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:26,606 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:26,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 04:14:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:14:27,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 04:14:27,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:27,342 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:27,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549583370] [2022-11-03 04:14:27,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549583370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:27,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:27,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:14:27,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622664369] [2022-11-03 04:14:27,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:27,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:14:27,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:27,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:14:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:14:27,344 INFO L87 Difference]: Start difference. First operand 17226 states and 30022 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:29,910 INFO L93 Difference]: Finished difference Result 49804 states and 94201 transitions. [2022-11-03 04:14:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:14:29,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 141 [2022-11-03 04:14:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:30,188 INFO L225 Difference]: With dead ends: 49804 [2022-11-03 04:14:30,188 INFO L226 Difference]: Without dead ends: 32642 [2022-11-03 04:14:30,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:14:30,445 INFO L413 NwaCegarLoop]: 1102 mSDtfsCounter, 839 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:30,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1962 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:14:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32642 states. [2022-11-03 04:14:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32642 to 32638. [2022-11-03 04:14:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32638 states, 25539 states have (on average 1.597595833822781) internal successors, (40801), 26503 states have internal predecessors, (40801), 5594 states have call successors, (5594), 1486 states have call predecessors, (5594), 1504 states have return successors, (13832), 5450 states have call predecessors, (13832), 5524 states have call successors, (13832) [2022-11-03 04:14:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32638 states to 32638 states and 60227 transitions. [2022-11-03 04:14:33,581 INFO L78 Accepts]: Start accepts. Automaton has 32638 states and 60227 transitions. Word has length 141 [2022-11-03 04:14:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:33,582 INFO L495 AbstractCegarLoop]: Abstraction has 32638 states and 60227 transitions. [2022-11-03 04:14:33,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 32638 states and 60227 transitions. [2022-11-03 04:14:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 04:14:33,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:33,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:33,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:33,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:33,802 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1996255840, now seen corresponding path program 1 times [2022-11-03 04:14:33,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:33,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385321492] [2022-11-03 04:14:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:33,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:33,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:33,805 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:33,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 04:14:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:14:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 04:14:34,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:34,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:34,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385321492] [2022-11-03 04:14:34,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385321492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:34,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:34,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 04:14:34,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332219660] [2022-11-03 04:14:34,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:34,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:14:34,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:14:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:14:34,804 INFO L87 Difference]: Start difference. First operand 32638 states and 60227 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:40,862 INFO L93 Difference]: Finished difference Result 96060 states and 202351 transitions. [2022-11-03 04:14:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:14:40,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 142 [2022-11-03 04:14:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:41,399 INFO L225 Difference]: With dead ends: 96060 [2022-11-03 04:14:41,399 INFO L226 Difference]: Without dead ends: 63486 [2022-11-03 04:14:42,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:14:42,127 INFO L413 NwaCegarLoop]: 1129 mSDtfsCounter, 837 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:42,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1998 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:14:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63486 states. [2022-11-03 04:14:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63486 to 63482. [2022-11-03 04:14:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63482 states, 49635 states have (on average 1.5936939659514455) internal successors, (79103), 51527 states have internal predecessors, (79103), 10918 states have call successors, (10918), 2894 states have call predecessors, (10918), 2928 states have return successors, (38707), 10662 states have call predecessors, (38707), 10784 states have call successors, (38707) [2022-11-03 04:14:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63482 states to 63482 states and 128728 transitions. [2022-11-03 04:14:49,057 INFO L78 Accepts]: Start accepts. Automaton has 63482 states and 128728 transitions. Word has length 142 [2022-11-03 04:14:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:49,058 INFO L495 AbstractCegarLoop]: Abstraction has 63482 states and 128728 transitions. [2022-11-03 04:14:49,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 04:14:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 63482 states and 128728 transitions. [2022-11-03 04:14:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 04:14:49,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:49,064 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:49,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-03 04:14:49,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:49,270 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1817631198, now seen corresponding path program 1 times [2022-11-03 04:14:49,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:49,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309081469] [2022-11-03 04:14:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:49,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:49,272 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:49,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f671ffdb-9092-4054-83fa-224e2e2d2093/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 04:14:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:49,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:14:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 04:14:49,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:14:49,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:49,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309081469] [2022-11-03 04:14:49,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309081469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:14:49,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:14:49,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:14:49,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849379854] [2022-11-03 04:14:49,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:14:49,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:14:49,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:14:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:14:49,848 INFO L87 Difference]: Start difference. First operand 63482 states and 128728 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14)