./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS --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 a46e7920fd800fb5978581c250ecd4216776e6eac1b8dfb89d2f8a9c2732a33c --- 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-8393723 [2022-11-19 06:37:43,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:37:43,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:37:43,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:37:43,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:37:43,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:37:43,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:37:43,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:37:43,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:37:43,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:37:43,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:37:43,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:37:43,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:37:43,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:37:43,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:37:43,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:37:43,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:37:43,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:37:43,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:37:43,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:37:43,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:37:43,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:37:43,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:37:43,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:37:43,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:37:43,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:37:43,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:37:43,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:37:43,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:37:43,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:37:43,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:37:43,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:37:43,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:37:43,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:37:43,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:37:43,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:37:43,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:37:43,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:37:43,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:37:43,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:37:43,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:37:43,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:37:43,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:37:43,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:37:43,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:37:43,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:37:43,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:37:43,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:37:43,796 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:37:43,796 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:37:43,796 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:37:43,797 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:37:43,797 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:37:43,797 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:37:43,797 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:37:43,798 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:37:43,798 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:37:43,798 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:37:43,798 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:37:43,799 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:37:43,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:37:43,800 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:37:43,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:37:43,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:37:43,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:37:43,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:37:43,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:37:43,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:37:43,802 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:37:43,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:37:43,802 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:37:43,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:37:43,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:37:43,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:37:43,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:37:43,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:37:43,804 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:37:43,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:37:43,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:37:43,805 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:37:43,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:37:43,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:37:43,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:37:43,806 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_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a46e7920fd800fb5978581c250ecd4216776e6eac1b8dfb89d2f8a9c2732a33c [2022-11-19 06:37:44,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:37:44,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:37:44,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:37:44,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:37:44,114 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:37:44,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c [2022-11-19 06:37:44,195 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/data/2078d0e38/9d8749a86d5245a7bdf42a4e58c6c895/FLAG98f0fb369 [2022-11-19 06:37:44,673 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:37:44,673 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c [2022-11-19 06:37:44,702 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/data/2078d0e38/9d8749a86d5245a7bdf42a4e58c6c895/FLAG98f0fb369 [2022-11-19 06:37:45,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/data/2078d0e38/9d8749a86d5245a7bdf42a4e58c6c895 [2022-11-19 06:37:45,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:37:45,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:37:45,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:37:45,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:37:45,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:37:45,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3871e46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45, skipping insertion in model container [2022-11-19 06:37:45,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:37:45,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:37:45,294 WARN L234 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_c6a173cf-9eed-43f3-81bb-18db85497957/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[914,927] [2022-11-19 06:37:45,351 WARN L234 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_c6a173cf-9eed-43f3-81bb-18db85497957/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[7115,7128] [2022-11-19 06:37:45,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:37:45,486 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:37:45,508 WARN L234 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_c6a173cf-9eed-43f3-81bb-18db85497957/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[914,927] [2022-11-19 06:37:45,537 WARN L234 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_c6a173cf-9eed-43f3-81bb-18db85497957/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-2.c[7115,7128] [2022-11-19 06:37:45,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:37:45,633 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:37:45,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45 WrapperNode [2022-11-19 06:37:45,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:37:45,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:37:45,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:37:45,635 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:37:45,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,750 INFO L138 Inliner]: procedures = 77, calls = 93, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1040 [2022-11-19 06:37:45,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:37:45,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:37:45,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:37:45,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:37:45,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,816 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:37:45,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:37:45,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:37:45,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:37:45,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (1/1) ... [2022-11-19 06:37:45,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:37:45,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:45,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:37:45,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:37:45,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:37:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 06:37:45,927 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 06:37:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 06:37:45,927 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 06:37:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 06:37:45,927 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 06:37:45,927 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 06:37:45,927 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 06:37:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 06:37:45,928 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 06:37:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 06:37:45,928 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 06:37:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 06:37:45,928 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 06:37:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 06:37:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 06:37:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 06:37:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 06:37:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 06:37:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 06:37:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 06:37:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 06:37:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:37:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 06:37:45,930 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 06:37:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 06:37:45,930 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 06:37:45,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:37:45,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:37:45,931 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 06:37:45,931 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 06:37:46,094 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:37:46,112 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:37:47,163 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:37:47,863 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:37:47,863 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-19 06:37:47,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:37:47 BoogieIcfgContainer [2022-11-19 06:37:47,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:37:47,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:37:47,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:37:47,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:37:47,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:37:45" (1/3) ... [2022-11-19 06:37:47,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd65e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:37:47, skipping insertion in model container [2022-11-19 06:37:47,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:45" (2/3) ... [2022-11-19 06:37:47,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd65e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:37:47, skipping insertion in model container [2022-11-19 06:37:47,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:37:47" (3/3) ... [2022-11-19 06:37:47,883 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.12.cil-2.c [2022-11-19 06:37:47,908 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:37:47,908 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 06:37:47,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:37:47,999 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;@71b383b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:37:47,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 06:37:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 260 states, 203 states have (on average 1.541871921182266) internal successors, (313), 209 states have internal predecessors, (313), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-19 06:37:48,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 06:37:48,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:48,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:48,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:48,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2021198345, now seen corresponding path program 1 times [2022-11-19 06:37:48,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:48,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331825392] [2022-11-19 06:37:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:48,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:48,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331825392] [2022-11-19 06:37:48,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331825392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:48,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:48,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:37:48,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528171471] [2022-11-19 06:37:48,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:48,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:37:48,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:37:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:37:48,547 INFO L87 Difference]: Start difference. First operand has 260 states, 203 states have (on average 1.541871921182266) internal successors, (313), 209 states have internal predecessors, (313), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:37:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:49,114 INFO L93 Difference]: Finished difference Result 571 states and 857 transitions. [2022-11-19 06:37:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:37:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 06:37:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:49,133 INFO L225 Difference]: With dead ends: 571 [2022-11-19 06:37:49,134 INFO L226 Difference]: Without dead ends: 315 [2022-11-19 06:37:49,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:37:49,151 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 441 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:49,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 648 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:37:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-19 06:37:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 308. [2022-11-19 06:37:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 238 states have (on average 1.453781512605042) internal successors, (346), 242 states have internal predecessors, (346), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-19 06:37:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 440 transitions. [2022-11-19 06:37:49,223 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 440 transitions. Word has length 45 [2022-11-19 06:37:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:49,223 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 440 transitions. [2022-11-19 06:37:49,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:37:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 440 transitions. [2022-11-19 06:37:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 06:37:49,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:49,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:49,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:37:49,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1354794328, now seen corresponding path program 1 times [2022-11-19 06:37:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:49,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828947583] [2022-11-19 06:37:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:49,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:49,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:49,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828947583] [2022-11-19 06:37:49,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828947583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:49,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:49,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:37:49,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015902656] [2022-11-19 06:37:49,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:49,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:37:49,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:37:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:37:49,365 INFO L87 Difference]: Start difference. First operand 308 states and 440 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:37:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:50,208 INFO L93 Difference]: Finished difference Result 710 states and 943 transitions. [2022-11-19 06:37:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:37:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 06:37:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:50,215 INFO L225 Difference]: With dead ends: 710 [2022-11-19 06:37:50,216 INFO L226 Difference]: Without dead ends: 578 [2022-11-19 06:37:50,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:37:50,218 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 908 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:50,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 1148 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:37:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-19 06:37:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 494. [2022-11-19 06:37:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 370 states have (on average 1.3675675675675676) internal successors, (506), 375 states have internal predecessors, (506), 75 states have call successors, (75), 44 states have call predecessors, (75), 47 states have return successors, (77), 76 states have call predecessors, (77), 73 states have call successors, (77) [2022-11-19 06:37:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 658 transitions. [2022-11-19 06:37:50,277 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 658 transitions. Word has length 45 [2022-11-19 06:37:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:50,278 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 658 transitions. [2022-11-19 06:37:50,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:37:50,278 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 658 transitions. [2022-11-19 06:37:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:37:50,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:50,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:50,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:37:50,281 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash 647056804, now seen corresponding path program 1 times [2022-11-19 06:37:50,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:50,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241203619] [2022-11-19 06:37:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:50,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:50,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241203619] [2022-11-19 06:37:50,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241203619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:50,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:50,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:37:50,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477425433] [2022-11-19 06:37:50,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:50,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:37:50,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:37:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:37:50,681 INFO L87 Difference]: Start difference. First operand 494 states and 658 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 06:37:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:51,605 INFO L93 Difference]: Finished difference Result 1010 states and 1274 transitions. [2022-11-19 06:37:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:37:51,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-19 06:37:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:51,613 INFO L225 Difference]: With dead ends: 1010 [2022-11-19 06:37:51,613 INFO L226 Difference]: Without dead ends: 708 [2022-11-19 06:37:51,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:37:51,623 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 534 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:51,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 957 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:37:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-11-19 06:37:51,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 673. [2022-11-19 06:37:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 495 states have (on average 1.3292929292929292) internal successors, (658), 501 states have internal predecessors, (658), 102 states have call successors, (102), 67 states have call predecessors, (102), 74 states have return successors, (108), 106 states have call predecessors, (108), 100 states have call successors, (108) [2022-11-19 06:37:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 868 transitions. [2022-11-19 06:37:51,716 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 868 transitions. Word has length 46 [2022-11-19 06:37:51,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:51,717 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 868 transitions. [2022-11-19 06:37:51,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 06:37:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 868 transitions. [2022-11-19 06:37:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:37:51,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:51,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:51,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:37:51,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash -733543464, now seen corresponding path program 1 times [2022-11-19 06:37:51,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:51,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286562599] [2022-11-19 06:37:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:51,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286562599] [2022-11-19 06:37:51,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286562599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:51,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:51,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:37:51,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766544944] [2022-11-19 06:37:51,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:51,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:37:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:51,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:37:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:37:51,827 INFO L87 Difference]: Start difference. First operand 673 states and 868 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:37:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:52,009 INFO L93 Difference]: Finished difference Result 1237 states and 1538 transitions. [2022-11-19 06:37:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:37:52,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-19 06:37:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:52,013 INFO L225 Difference]: With dead ends: 1237 [2022-11-19 06:37:52,014 INFO L226 Difference]: Without dead ends: 805 [2022-11-19 06:37:52,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:37:52,016 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 67 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:52,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 620 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-11-19 06:37:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 700. [2022-11-19 06:37:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 518 states have (on average 1.3185328185328185) internal successors, (683), 524 states have internal predecessors, (683), 104 states have call successors, (104), 69 states have call predecessors, (104), 76 states have return successors, (110), 108 states have call predecessors, (110), 102 states have call successors, (110) [2022-11-19 06:37:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 897 transitions. [2022-11-19 06:37:52,107 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 897 transitions. Word has length 47 [2022-11-19 06:37:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:52,107 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 897 transitions. [2022-11-19 06:37:52,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:37:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 897 transitions. [2022-11-19 06:37:52,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 06:37:52,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:52,109 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:37:52,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:37:52,110 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:52,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:52,110 INFO L85 PathProgramCache]: Analyzing trace with hash -360963317, now seen corresponding path program 1 times [2022-11-19 06:37:52,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:52,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934446776] [2022-11-19 06:37:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:52,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:37:52,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:52,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934446776] [2022-11-19 06:37:52,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934446776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:52,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:52,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:37:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828575975] [2022-11-19 06:37:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:52,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:37:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:37:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:37:52,189 INFO L87 Difference]: Start difference. First operand 700 states and 897 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:37:52,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:52,350 INFO L93 Difference]: Finished difference Result 890 states and 1118 transitions. [2022-11-19 06:37:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:37:52,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-19 06:37:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:52,355 INFO L225 Difference]: With dead ends: 890 [2022-11-19 06:37:52,355 INFO L226 Difference]: Without dead ends: 617 [2022-11-19 06:37:52,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:37:52,362 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 346 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:52,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 388 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-19 06:37:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 508. [2022-11-19 06:37:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 378 states have (on average 1.3253968253968254) internal successors, (501), 382 states have internal predecessors, (501), 80 states have call successors, (80), 49 states have call predecessors, (80), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-19 06:37:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 659 transitions. [2022-11-19 06:37:52,437 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 659 transitions. Word has length 53 [2022-11-19 06:37:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:52,437 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 659 transitions. [2022-11-19 06:37:52,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:37:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 659 transitions. [2022-11-19 06:37:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 06:37:52,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:52,440 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:37:52,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:37:52,440 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 752262594, now seen corresponding path program 1 times [2022-11-19 06:37:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:52,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482331768] [2022-11-19 06:37:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:52,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:52,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482331768] [2022-11-19 06:37:52,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482331768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:52,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:52,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:37:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637859098] [2022-11-19 06:37:52,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:52,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:37:52,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:37:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:37:52,557 INFO L87 Difference]: Start difference. First operand 508 states and 659 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 06:37:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:52,894 INFO L93 Difference]: Finished difference Result 611 states and 775 transitions. [2022-11-19 06:37:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:37:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-19 06:37:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:52,898 INFO L225 Difference]: With dead ends: 611 [2022-11-19 06:37:52,898 INFO L226 Difference]: Without dead ends: 608 [2022-11-19 06:37:52,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:37:52,899 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 629 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:52,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 364 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:37:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-19 06:37:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2022-11-19 06:37:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 378 states have (on average 1.3174603174603174) internal successors, (498), 381 states have internal predecessors, (498), 79 states have call successors, (79), 49 states have call predecessors, (79), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-19 06:37:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 655 transitions. [2022-11-19 06:37:52,956 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 655 transitions. Word has length 54 [2022-11-19 06:37:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:52,956 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 655 transitions. [2022-11-19 06:37:52,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 06:37:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 655 transitions. [2022-11-19 06:37:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 06:37:52,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:52,958 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:37:52,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:37:52,958 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1843870145, now seen corresponding path program 1 times [2022-11-19 06:37:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:52,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675717529] [2022-11-19 06:37:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:53,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675717529] [2022-11-19 06:37:53,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675717529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:37:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561179264] [2022-11-19 06:37:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:53,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:53,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:53,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:37:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:37:53,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:53,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:37:54,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561179264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:54,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114125776] [2022-11-19 06:37:54,055 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 06:37:54,055 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:54,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:54,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:54,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:02,985 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-11-19 06:38:03,034 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 201 for LOIs [2022-11-19 06:38:03,072 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-11-19 06:38:03,921 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-11-19 06:38:04,007 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-11-19 06:38:04,090 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-11-19 06:38:04,120 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-11-19 06:38:04,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:37,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [114125776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:37,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:38:37,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-19 06:38:37,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634292933] [2022-11-19 06:38:37,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:37,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 06:38:37,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 06:38:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 06:38:37,969 INFO L87 Difference]: Start difference. First operand 507 states and 655 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:39:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:21,958 INFO L93 Difference]: Finished difference Result 871 states and 1066 transitions. [2022-11-19 06:39:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 06:39:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-19 06:39:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:21,963 INFO L225 Difference]: With dead ends: 871 [2022-11-19 06:39:21,963 INFO L226 Difference]: Without dead ends: 556 [2022-11-19 06:39:21,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 63.2s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-11-19 06:39:21,966 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 182 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 6552 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 2885 SdHoareTripleChecker+Invalid, 6724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 6552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:21,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 2885 Invalid, 6724 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [172 Valid, 6552 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-11-19 06:39:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-19 06:39:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 541. [2022-11-19 06:39:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 404 states have (on average 1.301980198019802) internal successors, (526), 407 states have internal predecessors, (526), 81 states have call successors, (81), 55 states have call predecessors, (81), 54 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-11-19 06:39:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 687 transitions. [2022-11-19 06:39:22,078 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 687 transitions. Word has length 55 [2022-11-19 06:39:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:22,078 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 687 transitions. [2022-11-19 06:39:22,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:39:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 687 transitions. [2022-11-19 06:39:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 06:39:22,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:22,080 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:39:22,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:39:22,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:22,286 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1735424114, now seen corresponding path program 1 times [2022-11-19 06:39:22,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:22,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638318787] [2022-11-19 06:39:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:22,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:39:22,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:22,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638318787] [2022-11-19 06:39:22,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638318787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:39:22,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:39:22,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:39:22,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839415412] [2022-11-19 06:39:22,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:39:22,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:39:22,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:22,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:39:22,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:39:22,339 INFO L87 Difference]: Start difference. First operand 541 states and 687 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 06:39:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:22,590 INFO L93 Difference]: Finished difference Result 822 states and 1009 transitions. [2022-11-19 06:39:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:39:22,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-19 06:39:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:22,594 INFO L225 Difference]: With dead ends: 822 [2022-11-19 06:39:22,594 INFO L226 Difference]: Without dead ends: 653 [2022-11-19 06:39:22,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:39:22,595 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 42 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:22,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 659 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:39:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-11-19 06:39:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 576. [2022-11-19 06:39:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 433 states have (on average 1.297921478060046) internal successors, (562), 436 states have internal predecessors, (562), 84 states have call successors, (84), 58 states have call predecessors, (84), 57 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-19 06:39:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 729 transitions. [2022-11-19 06:39:22,728 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 729 transitions. Word has length 61 [2022-11-19 06:39:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:22,729 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 729 transitions. [2022-11-19 06:39:22,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 06:39:22,729 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 729 transitions. [2022-11-19 06:39:22,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 06:39:22,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:22,731 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] [2022-11-19 06:39:22,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:39:22,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1446486761, now seen corresponding path program 1 times [2022-11-19 06:39:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:22,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583854187] [2022-11-19 06:39:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:22,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:39:22,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583854187] [2022-11-19 06:39:22,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583854187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:39:22,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:39:22,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:39:22,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301473938] [2022-11-19 06:39:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:39:22,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:39:22,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:39:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:39:22,900 INFO L87 Difference]: Start difference. First operand 576 states and 729 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:39:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:23,828 INFO L93 Difference]: Finished difference Result 1039 states and 1255 transitions. [2022-11-19 06:39:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:39:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-19 06:39:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:23,832 INFO L225 Difference]: With dead ends: 1039 [2022-11-19 06:39:23,832 INFO L226 Difference]: Without dead ends: 736 [2022-11-19 06:39:23,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:39:23,834 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 518 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:23,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 921 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:39:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-19 06:39:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 715. [2022-11-19 06:39:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 527 states have (on average 1.2618595825426946) internal successors, (665), 530 states have internal predecessors, (665), 108 states have call successors, (108), 79 states have call predecessors, (108), 78 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2022-11-19 06:39:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 880 transitions. [2022-11-19 06:39:23,989 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 880 transitions. Word has length 63 [2022-11-19 06:39:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:23,989 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 880 transitions. [2022-11-19 06:39:23,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:39:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 880 transitions. [2022-11-19 06:39:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 06:39:24,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:24,007 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] [2022-11-19 06:39:24,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:39:24,008 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1421406848, now seen corresponding path program 1 times [2022-11-19 06:39:24,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:24,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468359680] [2022-11-19 06:39:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:24,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:39:24,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:24,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468359680] [2022-11-19 06:39:24,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468359680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:39:24,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934146721] [2022-11-19 06:39:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:24,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:24,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:24,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:24,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:39:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:39:24,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:39:24,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:39:24,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934146721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:24,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073599322] [2022-11-19 06:39:24,751 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 06:39:24,751 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:24,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:24,752 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:24,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:44,923 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 205 for LOIs [2022-11-19 06:39:44,962 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 171 for LOIs [2022-11-19 06:39:44,977 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 324 for LOIs [2022-11-19 06:39:45,157 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 209 for LOIs [2022-11-19 06:39:46,013 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 205 for LOIs [2022-11-19 06:39:46,139 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 205 for LOIs [2022-11-19 06:39:46,266 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 205 for LOIs [2022-11-19 06:39:46,299 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 212 for LOIs [2022-11-19 06:39:46,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:32,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19761#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:40:32,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:32,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:32,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 06:40:32,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200941091] [2022-11-19 06:40:32,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:32,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:40:32,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:32,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:40:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 06:40:32,741 INFO L87 Difference]: Start difference. First operand 715 states and 880 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 06:40:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:33,603 INFO L93 Difference]: Finished difference Result 1809 states and 2121 transitions. [2022-11-19 06:40:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:40:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-19 06:40:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:33,612 INFO L225 Difference]: With dead ends: 1809 [2022-11-19 06:40:33,612 INFO L226 Difference]: Without dead ends: 1806 [2022-11-19 06:40:33,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 06:40:33,614 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 548 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:33,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1426 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:40:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-11-19 06:40:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1229. [2022-11-19 06:40:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 883 states have (on average 1.2276330690826727) internal successors, (1084), 886 states have internal predecessors, (1084), 192 states have call successors, (192), 153 states have call predecessors, (192), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-19 06:40:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1467 transitions. [2022-11-19 06:40:33,830 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1467 transitions. Word has length 64 [2022-11-19 06:40:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:33,831 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1467 transitions. [2022-11-19 06:40:33,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 06:40:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1467 transitions. [2022-11-19 06:40:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 06:40:33,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:33,833 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 06:40:33,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 06:40:34,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:40:34,038 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:34,039 INFO L85 PathProgramCache]: Analyzing trace with hash 148070495, now seen corresponding path program 2 times [2022-11-19 06:40:34,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:34,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095479484] [2022-11-19 06:40:34,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:34,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:40:34,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:34,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095479484] [2022-11-19 06:40:34,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095479484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:40:34,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:40:34,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:40:34,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209575666] [2022-11-19 06:40:34,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:40:34,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:40:34,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:34,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:40:34,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:40:34,083 INFO L87 Difference]: Start difference. First operand 1229 states and 1467 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 06:40:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:34,414 INFO L93 Difference]: Finished difference Result 1981 states and 2323 transitions. [2022-11-19 06:40:34,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:40:34,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-19 06:40:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:34,420 INFO L225 Difference]: With dead ends: 1981 [2022-11-19 06:40:34,420 INFO L226 Difference]: Without dead ends: 1225 [2022-11-19 06:40:34,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:40:34,423 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 349 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:34,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 421 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:40:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-11-19 06:40:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1214. [2022-11-19 06:40:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 868 states have (on average 1.2142857142857142) internal successors, (1054), 871 states have internal predecessors, (1054), 192 states have call successors, (192), 153 states have call predecessors, (192), 152 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-19 06:40:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1437 transitions. [2022-11-19 06:40:34,648 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1437 transitions. Word has length 67 [2022-11-19 06:40:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:34,648 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 1437 transitions. [2022-11-19 06:40:34,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 06:40:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1437 transitions. [2022-11-19 06:40:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 06:40:34,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:34,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:34,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:40:34,651 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash 804736956, now seen corresponding path program 1 times [2022-11-19 06:40:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:34,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271306079] [2022-11-19 06:40:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:34,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:40:34,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:34,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271306079] [2022-11-19 06:40:34,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271306079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:40:34,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:40:34,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:40:34,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631440015] [2022-11-19 06:40:34,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:40:34,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:40:34,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:34,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:40:34,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:40:34,768 INFO L87 Difference]: Start difference. First operand 1214 states and 1437 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 06:40:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:36,049 INFO L93 Difference]: Finished difference Result 2092 states and 2896 transitions. [2022-11-19 06:40:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:40:36,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-11-19 06:40:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:36,060 INFO L225 Difference]: With dead ends: 2092 [2022-11-19 06:40:36,060 INFO L226 Difference]: Without dead ends: 1911 [2022-11-19 06:40:36,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:40:36,063 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 1451 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:36,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1468 Valid, 1442 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:40:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-11-19 06:40:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1900. [2022-11-19 06:40:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1445 states have (on average 1.3397923875432527) internal successors, (1936), 1451 states have internal predecessors, (1936), 277 states have call successors, (277), 177 states have call predecessors, (277), 176 states have return successors, (338), 273 states have call predecessors, (338), 276 states have call successors, (338) [2022-11-19 06:40:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 2551 transitions. [2022-11-19 06:40:36,371 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 2551 transitions. Word has length 67 [2022-11-19 06:40:36,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:36,371 INFO L495 AbstractCegarLoop]: Abstraction has 1900 states and 2551 transitions. [2022-11-19 06:40:36,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 06:40:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 2551 transitions. [2022-11-19 06:40:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 06:40:36,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:36,373 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 06:40:36,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 06:40:36,374 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:36,374 INFO L85 PathProgramCache]: Analyzing trace with hash -498593909, now seen corresponding path program 1 times [2022-11-19 06:40:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:36,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80584009] [2022-11-19 06:40:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:36,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:40:36,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:36,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80584009] [2022-11-19 06:40:36,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80584009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:40:36,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:40:36,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:40:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423327511] [2022-11-19 06:40:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:40:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:40:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:36,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:40:36,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:40:36,436 INFO L87 Difference]: Start difference. First operand 1900 states and 2551 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 06:40:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:36,908 INFO L93 Difference]: Finished difference Result 2866 states and 3645 transitions. [2022-11-19 06:40:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:40:36,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-19 06:40:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:36,919 INFO L225 Difference]: With dead ends: 2866 [2022-11-19 06:40:36,919 INFO L226 Difference]: Without dead ends: 2076 [2022-11-19 06:40:36,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:40:36,923 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 37 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:36,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 650 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:40:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2022-11-19 06:40:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1947. [2022-11-19 06:40:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1484 states have (on average 1.3355795148247978) internal successors, (1982), 1490 states have internal predecessors, (1982), 281 states have call successors, (281), 181 states have call predecessors, (281), 180 states have return successors, (342), 277 states have call predecessors, (342), 280 states have call successors, (342) [2022-11-19 06:40:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2605 transitions. [2022-11-19 06:40:37,249 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2605 transitions. Word has length 71 [2022-11-19 06:40:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:37,249 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 2605 transitions. [2022-11-19 06:40:37,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 06:40:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2605 transitions. [2022-11-19 06:40:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 06:40:37,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:37,252 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:37,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 06:40:37,252 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:37,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1736977228, now seen corresponding path program 1 times [2022-11-19 06:40:37,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:37,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125189452] [2022-11-19 06:40:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:37,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 06:40:37,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:37,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125189452] [2022-11-19 06:40:37,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125189452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:37,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170489391] [2022-11-19 06:40:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:37,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:37,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:37,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:37,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:40:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:37,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:40:37,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:40:37,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:40:37,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170489391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:40:37,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:40:37,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 06:40:37,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304638782] [2022-11-19 06:40:37,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:40:37,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:40:37,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:40:37,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:40:37,899 INFO L87 Difference]: Start difference. First operand 1947 states and 2605 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:40:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:38,523 INFO L93 Difference]: Finished difference Result 2809 states and 3609 transitions. [2022-11-19 06:40:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:40:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 06:40:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:38,532 INFO L225 Difference]: With dead ends: 2809 [2022-11-19 06:40:38,532 INFO L226 Difference]: Without dead ends: 1762 [2022-11-19 06:40:38,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:40:38,536 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 344 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:38,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1418 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:40:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-11-19 06:40:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1577. [2022-11-19 06:40:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1246 states have (on average 1.3731942215088282) internal successors, (1711), 1252 states have internal predecessors, (1711), 210 states have call successors, (210), 120 states have call predecessors, (210), 119 states have return successors, (271), 206 states have call predecessors, (271), 209 states have call successors, (271) [2022-11-19 06:40:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2192 transitions. [2022-11-19 06:40:38,819 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2192 transitions. Word has length 102 [2022-11-19 06:40:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:38,819 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2192 transitions. [2022-11-19 06:40:38,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:40:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2192 transitions. [2022-11-19 06:40:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 06:40:38,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:38,824 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:38,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:39,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 06:40:39,030 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1207127067, now seen corresponding path program 1 times [2022-11-19 06:40:39,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:39,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19476365] [2022-11-19 06:40:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:39,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 06:40:39,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19476365] [2022-11-19 06:40:39,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19476365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506114674] [2022-11-19 06:40:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:39,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:39,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:39,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:39,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:40:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:39,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:40:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:40:39,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:40:39,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506114674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:40:39,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:40:39,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 06:40:39,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122156594] [2022-11-19 06:40:39,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:40:39,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:40:39,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:39,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:40:39,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:40:39,530 INFO L87 Difference]: Start difference. First operand 1577 states and 2192 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:40:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:40,134 INFO L93 Difference]: Finished difference Result 2126 states and 2817 transitions. [2022-11-19 06:40:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:40:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-19 06:40:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:40,141 INFO L225 Difference]: With dead ends: 2126 [2022-11-19 06:40:40,142 INFO L226 Difference]: Without dead ends: 1533 [2022-11-19 06:40:40,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:40:40,146 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 67 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:40,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 2017 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:40:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-11-19 06:40:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1441. [2022-11-19 06:40:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1146 states have (on average 1.3909249563699826) internal successors, (1594), 1152 states have internal predecessors, (1594), 191 states have call successors, (191), 103 states have call predecessors, (191), 102 states have return successors, (252), 187 states have call predecessors, (252), 190 states have call successors, (252) [2022-11-19 06:40:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2037 transitions. [2022-11-19 06:40:40,386 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2037 transitions. Word has length 112 [2022-11-19 06:40:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:40,386 INFO L495 AbstractCegarLoop]: Abstraction has 1441 states and 2037 transitions. [2022-11-19 06:40:40,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:40:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2037 transitions. [2022-11-19 06:40:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 06:40:40,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:40,391 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:40,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:40,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:40,597 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1506468972, now seen corresponding path program 1 times [2022-11-19 06:40:40,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:40,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438419152] [2022-11-19 06:40:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:40,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 06:40:40,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:40,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438419152] [2022-11-19 06:40:40,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438419152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:40,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397717068] [2022-11-19 06:40:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:40,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:40,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:40,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:40:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:40,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:40:40,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:40:41,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:40:41,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397717068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:40:41,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:40:41,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 06:40:41,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946883981] [2022-11-19 06:40:41,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:40:41,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:40:41,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:41,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:40:41,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:40:41,053 INFO L87 Difference]: Start difference. First operand 1441 states and 2037 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 06:40:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:41,584 INFO L93 Difference]: Finished difference Result 2190 states and 2882 transitions. [2022-11-19 06:40:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:40:41,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-19 06:40:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:41,592 INFO L225 Difference]: With dead ends: 2190 [2022-11-19 06:40:41,593 INFO L226 Difference]: Without dead ends: 1733 [2022-11-19 06:40:41,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:40:41,595 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 329 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:41,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1450 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:40:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-19 06:40:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1699. [2022-11-19 06:40:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1308 states have (on average 1.356269113149847) internal successors, (1774), 1320 states have internal predecessors, (1774), 239 states have call successors, (239), 145 states have call predecessors, (239), 150 states have return successors, (312), 235 states have call predecessors, (312), 238 states have call successors, (312) [2022-11-19 06:40:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2325 transitions. [2022-11-19 06:40:41,892 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2325 transitions. Word has length 113 [2022-11-19 06:40:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:41,893 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2325 transitions. [2022-11-19 06:40:41,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 06:40:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2325 transitions. [2022-11-19 06:40:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 06:40:41,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:41,896 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:41,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:42,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:40:42,103 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1962920700, now seen corresponding path program 1 times [2022-11-19 06:40:42,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:42,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115011162] [2022-11-19 06:40:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:42,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:40:42,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115011162] [2022-11-19 06:40:42,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115011162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:42,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436636282] [2022-11-19 06:40:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:42,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:42,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:42,999 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:43,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:40:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:43,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 06:40:43,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:40:44,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 06:40:46,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436636282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:46,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534240812] [2022-11-19 06:40:46,043 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 06:40:46,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:46,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:46,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:46,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:30,861 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 384 for LOIs [2022-11-19 06:42:32,102 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 336 for LOIs [2022-11-19 06:42:32,270 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 329 for LOIs [2022-11-19 06:42:32,441 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 396 for LOIs [2022-11-19 06:42:37,404 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 224 for LOIs [2022-11-19 06:42:38,000 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 173 for LOIs [2022-11-19 06:42:38,621 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 388 for LOIs [2022-11-19 06:42:39,775 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 411 for LOIs [2022-11-19 06:42:40,899 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:09,537 WARN L233 SmtUtils]: Spent 7.68s on a formula simplification. DAG size of input: 357 DAG size of output: 276 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:44:17,553 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 363 DAG size of output: 282 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:44:25,522 WARN L233 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 365 DAG size of output: 284 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:44:58,100 WARN L233 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 367 DAG size of output: 286 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:45:01,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60345#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (<= ~t12_i~0 0) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-11-19 06:45:01,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:45:01,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:45:01,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-19 06:45:01,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434551582] [2022-11-19 06:45:01,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:45:01,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 06:45:01,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:01,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 06:45:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=9948, Unknown=0, NotChecked=0, Total=10712 [2022-11-19 06:45:01,892 INFO L87 Difference]: Start difference. First operand 1699 states and 2325 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-19 06:45:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:27,588 INFO L93 Difference]: Finished difference Result 3989 states and 4979 transitions. [2022-11-19 06:45:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-19 06:45:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-19 06:45:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:27,604 INFO L225 Difference]: With dead ends: 3989 [2022-11-19 06:45:27,604 INFO L226 Difference]: Without dead ends: 3274 [2022-11-19 06:45:27,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 287 SyntacticMatches, 8 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40697 ImplicationChecksByTransitivity, 160.3s TimeCoverageRelationStatistics Valid=9160, Invalid=89122, Unknown=0, NotChecked=0, Total=98282 [2022-11-19 06:45:27,623 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 4686 mSDsluCounter, 4646 mSDsCounter, 0 mSdLazyCounter, 8985 mSolverCounterSat, 2091 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4688 SdHoareTripleChecker+Valid, 4906 SdHoareTripleChecker+Invalid, 11076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2091 IncrementalHoareTripleChecker+Valid, 8985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:27,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4688 Valid, 4906 Invalid, 11076 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2091 Valid, 8985 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-19 06:45:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2022-11-19 06:45:28,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 1975. [2022-11-19 06:45:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1492 states have (on average 1.3304289544235925) internal successors, (1985), 1506 states have internal predecessors, (1985), 284 states have call successors, (284), 182 states have call predecessors, (284), 197 states have return successors, (369), 288 states have call predecessors, (369), 283 states have call successors, (369) [2022-11-19 06:45:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2638 transitions. [2022-11-19 06:45:28,145 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2638 transitions. Word has length 114 [2022-11-19 06:45:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:28,146 INFO L495 AbstractCegarLoop]: Abstraction has 1975 states and 2638 transitions. [2022-11-19 06:45:28,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-19 06:45:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2638 transitions. [2022-11-19 06:45:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 06:45:28,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:28,167 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:28,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:45:28,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 06:45:28,373 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash -851461587, now seen corresponding path program 1 times [2022-11-19 06:45:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:28,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943039103] [2022-11-19 06:45:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:28,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 06:45:28,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943039103] [2022-11-19 06:45:28,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943039103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:45:28,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959997301] [2022-11-19 06:45:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:28,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:45:28,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:45:28,811 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:45:28,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:45:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:28,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:45:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:45:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 06:45:29,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:45:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 06:45:29,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959997301] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 06:45:29,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:45:29,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 06:45:29,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171315990] [2022-11-19 06:45:29,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:29,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:45:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:45:29,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:45:29,362 INFO L87 Difference]: Start difference. First operand 1975 states and 2638 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 06:45:30,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:30,737 INFO L93 Difference]: Finished difference Result 3299 states and 4186 transitions. [2022-11-19 06:45:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:45:30,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-19 06:45:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:30,750 INFO L225 Difference]: With dead ends: 3299 [2022-11-19 06:45:30,751 INFO L226 Difference]: Without dead ends: 2308 [2022-11-19 06:45:30,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-19 06:45:30,755 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 509 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:30,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 911 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:45:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-11-19 06:45:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2055. [2022-11-19 06:45:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 1537 states have (on average 1.324658425504229) internal successors, (2036), 1554 states have internal predecessors, (2036), 303 states have call successors, (303), 191 states have call predecessors, (303), 213 states have return successors, (409), 311 states have call predecessors, (409), 302 states have call successors, (409) [2022-11-19 06:45:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 2748 transitions. [2022-11-19 06:45:31,218 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 2748 transitions. Word has length 115 [2022-11-19 06:45:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:31,218 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 2748 transitions. [2022-11-19 06:45:31,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 06:45:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 2748 transitions. [2022-11-19 06:45:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 06:45:31,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:31,223 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:31,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:45:31,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 06:45:31,436 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:31,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:31,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1559178268, now seen corresponding path program 1 times [2022-11-19 06:45:31,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:31,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186982726] [2022-11-19 06:45:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 06:45:32,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186982726] [2022-11-19 06:45:32,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186982726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:45:32,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942217208] [2022-11-19 06:45:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:32,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:45:32,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:45:32,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:45:32,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:45:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:32,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 06:45:32,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:45:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:45:33,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:45:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:45:35,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942217208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:45:35,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641310126] [2022-11-19 06:45:35,269 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 06:45:35,269 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:45:35,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:45:35,270 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:45:35,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:46:04,678 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 372 for LOIs [2022-11-19 06:46:05,778 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 321 for LOIs [2022-11-19 06:46:05,929 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 319 for LOIs [2022-11-19 06:46:06,095 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 384 for LOIs [2022-11-19 06:46:10,802 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 212 for LOIs [2022-11-19 06:46:11,404 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 160 for LOIs [2022-11-19 06:46:11,976 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 376 for LOIs [2022-11-19 06:46:13,421 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 399 for LOIs [2022-11-19 06:46:14,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:46:49,524 WARN L233 SmtUtils]: Spent 6.69s on a formula simplification. DAG size of input: 327 DAG size of output: 248 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:46:56,636 WARN L233 SmtUtils]: Spent 6.73s on a formula simplification. DAG size of input: 329 DAG size of output: 250 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:47:34,016 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 355 DAG size of output: 274 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:03,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '78749#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t11_i~0) (= 0 ~t2_st~0) (<= 2 ~T12_E~0) (<= 2 ~E_5~0) (= ~t12_st~0 0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (= ~t11_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (<= ~t11_i~0 0) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0) (<= ~T12_E~0 2))' at error location [2022-11-19 06:48:03,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:48:03,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:48:03,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-19 06:48:03,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028974899] [2022-11-19 06:48:03,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:48:03,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 06:48:03,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 06:48:03,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=10477, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 06:48:03,352 INFO L87 Difference]: Start difference. First operand 2055 states and 2748 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-19 06:48:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:14,472 INFO L93 Difference]: Finished difference Result 4904 states and 6090 transitions. [2022-11-19 06:48:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-19 06:48:14,473 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-19 06:48:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:14,490 INFO L225 Difference]: With dead ends: 4904 [2022-11-19 06:48:14,490 INFO L226 Difference]: Without dead ends: 3833 [2022-11-19 06:48:14,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 310 SyntacticMatches, 5 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14920 ImplicationChecksByTransitivity, 115.4s TimeCoverageRelationStatistics Valid=3633, Invalid=32277, Unknown=0, NotChecked=0, Total=35910 [2022-11-19 06:48:14,497 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 4793 mSDsluCounter, 2634 mSDsCounter, 0 mSdLazyCounter, 5964 mSolverCounterSat, 2412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4794 SdHoareTripleChecker+Valid, 2865 SdHoareTripleChecker+Invalid, 8376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2412 IncrementalHoareTripleChecker+Valid, 5964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:14,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4794 Valid, 2865 Invalid, 8376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2412 Valid, 5964 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-19 06:48:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2022-11-19 06:48:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2592. [2022-11-19 06:48:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 1923 states have (on average 1.2922516900676027) internal successors, (2485), 1940 states have internal predecessors, (2485), 377 states have call successors, (377), 250 states have call predecessors, (377), 290 states have return successors, (501), 403 states have call predecessors, (501), 376 states have call successors, (501) [2022-11-19 06:48:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 3363 transitions. [2022-11-19 06:48:15,163 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 3363 transitions. Word has length 124 [2022-11-19 06:48:15,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:15,163 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 3363 transitions. [2022-11-19 06:48:15,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-19 06:48:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 3363 transitions. [2022-11-19 06:48:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 06:48:15,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:15,167 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:15,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:15,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:15,374 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:15,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1119827645, now seen corresponding path program 1 times [2022-11-19 06:48:15,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:15,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124723449] [2022-11-19 06:48:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:15,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 06:48:15,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:15,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124723449] [2022-11-19 06:48:15,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124723449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:15,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479812146] [2022-11-19 06:48:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:15,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:15,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:15,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:15,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:48:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 06:48:15,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 06:48:15,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:48:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 06:48:16,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479812146] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:16,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:48:16,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 06:48:16,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516422003] [2022-11-19 06:48:16,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:16,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:48:16,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:48:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:48:16,136 INFO L87 Difference]: Start difference. First operand 2592 states and 3363 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 06:48:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:17,504 INFO L93 Difference]: Finished difference Result 3551 states and 4454 transitions. [2022-11-19 06:48:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:48:17,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-19 06:48:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:17,513 INFO L225 Difference]: With dead ends: 3551 [2022-11-19 06:48:17,514 INFO L226 Difference]: Without dead ends: 1943 [2022-11-19 06:48:17,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:48:17,518 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 789 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:17,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 837 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:48:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2022-11-19 06:48:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1602. [2022-11-19 06:48:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1226 states have (on average 1.3564437194127243) internal successors, (1663), 1242 states have internal predecessors, (1663), 227 states have call successors, (227), 129 states have call predecessors, (227), 147 states have return successors, (318), 232 states have call predecessors, (318), 226 states have call successors, (318) [2022-11-19 06:48:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2208 transitions. [2022-11-19 06:48:17,838 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2208 transitions. Word has length 125 [2022-11-19 06:48:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:17,863 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2208 transitions. [2022-11-19 06:48:17,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 06:48:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2208 transitions. [2022-11-19 06:48:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 06:48:17,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:17,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:17,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:18,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-19 06:48:18,068 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:18,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1968759868, now seen corresponding path program 1 times [2022-11-19 06:48:18,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:18,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430270284] [2022-11-19 06:48:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:18,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:48:18,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430270284] [2022-11-19 06:48:18,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430270284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512635929] [2022-11-19 06:48:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:18,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:18,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:18,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:18,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:48:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:18,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:48:18,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 06:48:18,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:48:18,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512635929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:18,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:48:18,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:48:18,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517069251] [2022-11-19 06:48:18,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:18,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:48:18,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:48:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:18,554 INFO L87 Difference]: Start difference. First operand 1602 states and 2208 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:19,175 INFO L93 Difference]: Finished difference Result 3320 states and 5092 transitions. [2022-11-19 06:48:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:48:19,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-19 06:48:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:19,187 INFO L225 Difference]: With dead ends: 3320 [2022-11-19 06:48:19,188 INFO L226 Difference]: Without dead ends: 2453 [2022-11-19 06:48:19,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:19,193 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 321 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:19,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:48:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2022-11-19 06:48:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2446. [2022-11-19 06:48:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 1938 states have (on average 1.4169246646026832) internal successors, (2746), 1957 states have internal predecessors, (2746), 329 states have call successors, (329), 159 states have call predecessors, (329), 177 states have return successors, (478), 331 states have call predecessors, (478), 328 states have call successors, (478) [2022-11-19 06:48:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3553 transitions. [2022-11-19 06:48:19,831 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3553 transitions. Word has length 136 [2022-11-19 06:48:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:19,831 INFO L495 AbstractCegarLoop]: Abstraction has 2446 states and 3553 transitions. [2022-11-19 06:48:19,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3553 transitions. [2022-11-19 06:48:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 06:48:19,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:19,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:19,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:20,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 06:48:20,043 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1393679196, now seen corresponding path program 1 times [2022-11-19 06:48:20,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:20,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299508903] [2022-11-19 06:48:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:20,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:48:20,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:20,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299508903] [2022-11-19 06:48:20,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299508903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:20,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101187489] [2022-11-19 06:48:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:20,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:20,179 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:20,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:48:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:20,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:48:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:48:20,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:48:20,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101187489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:20,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:48:20,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:48:20,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707575060] [2022-11-19 06:48:20,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:48:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:48:20,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:20,499 INFO L87 Difference]: Start difference. First operand 2446 states and 3553 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:21,325 INFO L93 Difference]: Finished difference Result 5837 states and 9219 transitions. [2022-11-19 06:48:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:48:21,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-19 06:48:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:21,350 INFO L225 Difference]: With dead ends: 5837 [2022-11-19 06:48:21,350 INFO L226 Difference]: Without dead ends: 4126 [2022-11-19 06:48:21,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:21,359 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 324 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:21,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:48:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2022-11-19 06:48:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 4114. [2022-11-19 06:48:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 3347 states have (on average 1.4586196593964744) internal successors, (4882), 3372 states have internal predecessors, (4882), 528 states have call successors, (528), 219 states have call predecessors, (528), 237 states have return successors, (789), 524 states have call predecessors, (789), 527 states have call successors, (789) [2022-11-19 06:48:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 6199 transitions. [2022-11-19 06:48:21,959 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 6199 transitions. Word has length 136 [2022-11-19 06:48:21,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:21,960 INFO L495 AbstractCegarLoop]: Abstraction has 4114 states and 6199 transitions. [2022-11-19 06:48:21,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 6199 transitions. [2022-11-19 06:48:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 06:48:21,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:21,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:21,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:22,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:22,177 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1789923388, now seen corresponding path program 1 times [2022-11-19 06:48:22,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:22,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688328245] [2022-11-19 06:48:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:22,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:48:22,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:22,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688328245] [2022-11-19 06:48:22,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688328245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:22,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973652621] [2022-11-19 06:48:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:22,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:22,315 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:22,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:48:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:22,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:48:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 06:48:22,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:48:22,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973652621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:22,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:48:22,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:48:22,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907179031] [2022-11-19 06:48:22,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:22,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:48:22,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:48:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:22,622 INFO L87 Difference]: Start difference. First operand 4114 states and 6199 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:23,859 INFO L93 Difference]: Finished difference Result 10811 states and 17332 transitions. [2022-11-19 06:48:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:48:23,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-19 06:48:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:23,888 INFO L225 Difference]: With dead ends: 10811 [2022-11-19 06:48:23,888 INFO L226 Difference]: Without dead ends: 7432 [2022-11-19 06:48:23,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:23,904 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 345 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:23,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:48:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2022-11-19 06:48:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 7410. [2022-11-19 06:48:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 6135 states have (on average 1.4823145884270579) internal successors, (9094), 6172 states have internal predecessors, (9094), 916 states have call successors, (916), 339 states have call predecessors, (916), 357 states have return successors, (1393), 900 states have call predecessors, (1393), 915 states have call successors, (1393) [2022-11-19 06:48:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 11403 transitions. [2022-11-19 06:48:24,901 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 11403 transitions. Word has length 136 [2022-11-19 06:48:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:24,902 INFO L495 AbstractCegarLoop]: Abstraction has 7410 states and 11403 transitions. [2022-11-19 06:48:24,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 11403 transitions. [2022-11-19 06:48:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 06:48:24,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:24,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:24,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:25,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:25,122 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:25,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:25,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1061312676, now seen corresponding path program 1 times [2022-11-19 06:48:25,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:25,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878722846] [2022-11-19 06:48:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:25,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:48:25,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878722846] [2022-11-19 06:48:25,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878722846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690423129] [2022-11-19 06:48:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:25,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:25,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:25,255 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:25,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 06:48:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:48:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:48:25,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:48:25,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690423129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:25,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:48:25,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:48:25,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807986367] [2022-11-19 06:48:25,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:25,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:48:25,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:25,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:48:25,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:25,575 INFO L87 Difference]: Start difference. First operand 7410 states and 11403 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:27,701 INFO L93 Difference]: Finished difference Result 20639 states and 33276 transitions. [2022-11-19 06:48:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:48:27,702 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-19 06:48:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:27,753 INFO L225 Difference]: With dead ends: 20639 [2022-11-19 06:48:27,753 INFO L226 Difference]: Without dead ends: 13964 [2022-11-19 06:48:27,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:27,780 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 336 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:27,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:48:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13964 states. [2022-11-19 06:48:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13964 to 13922. [2022-11-19 06:48:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13922 states, 11651 states have (on average 1.4932623809115098) internal successors, (17398), 11712 states have internal predecessors, (17398), 1672 states have call successors, (1672), 579 states have call predecessors, (1672), 597 states have return successors, (2565), 1632 states have call predecessors, (2565), 1671 states have call successors, (2565) [2022-11-19 06:48:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13922 states to 13922 states and 21635 transitions. [2022-11-19 06:48:29,895 INFO L78 Accepts]: Start accepts. Automaton has 13922 states and 21635 transitions. Word has length 136 [2022-11-19 06:48:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:29,896 INFO L495 AbstractCegarLoop]: Abstraction has 13922 states and 21635 transitions. [2022-11-19 06:48:29,896 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 13922 states and 21635 transitions. [2022-11-19 06:48:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 06:48:29,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:29,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:29,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:30,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 06:48:30,119 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1420587972, now seen corresponding path program 1 times [2022-11-19 06:48:30,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:30,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524216526] [2022-11-19 06:48:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:30,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:48:30,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:30,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524216526] [2022-11-19 06:48:30,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524216526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:30,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758035159] [2022-11-19 06:48:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:30,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:30,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:30,246 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:30,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 06:48:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:30,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:48:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 06:48:30,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:48:30,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758035159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:30,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:48:30,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:48:30,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916448017] [2022-11-19 06:48:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:30,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:48:30,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:48:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:30,563 INFO L87 Difference]: Start difference. First operand 13922 states and 21635 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:34,895 INFO L93 Difference]: Finished difference Result 40055 states and 64600 transitions. [2022-11-19 06:48:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:48:34,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-19 06:48:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:34,998 INFO L225 Difference]: With dead ends: 40055 [2022-11-19 06:48:34,998 INFO L226 Difference]: Without dead ends: 26868 [2022-11-19 06:48:35,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:35,044 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 342 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:35,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:48:35,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26868 states. [2022-11-19 06:48:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26868 to 26786. [2022-11-19 06:48:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26786 states, 22563 states have (on average 1.4965208527234855) internal successors, (33766), 22672 states have internal predecessors, (33766), 3144 states have call successors, (3144), 1059 states have call predecessors, (3144), 1077 states have return successors, (4837), 3056 states have call predecessors, (4837), 3143 states have call successors, (4837) [2022-11-19 06:48:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26786 states to 26786 states and 41747 transitions. [2022-11-19 06:48:38,766 INFO L78 Accepts]: Start accepts. Automaton has 26786 states and 41747 transitions. Word has length 136 [2022-11-19 06:48:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:38,767 INFO L495 AbstractCegarLoop]: Abstraction has 26786 states and 41747 transitions. [2022-11-19 06:48:38,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 26786 states and 41747 transitions. [2022-11-19 06:48:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 06:48:38,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:38,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:38,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:39,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:39,025 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:39,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:39,026 INFO L85 PathProgramCache]: Analyzing trace with hash -396211940, now seen corresponding path program 1 times [2022-11-19 06:48:39,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:39,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998580625] [2022-11-19 06:48:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:39,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:48:39,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998580625] [2022-11-19 06:48:39,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998580625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913329354] [2022-11-19 06:48:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:39,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:39,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:39,194 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:39,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6a173cf-9eed-43f3-81bb-18db85497957/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 06:48:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:39,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:48:39,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 06:48:39,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:48:39,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913329354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:39,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:48:39,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:48:39,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240450409] [2022-11-19 06:48:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:48:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:48:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:39,528 INFO L87 Difference]: Start difference. First operand 26786 states and 41747 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:48:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:48,732 INFO L93 Difference]: Finished difference Result 78407 states and 126120 transitions. [2022-11-19 06:48:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:48:48,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-11-19 06:48:48,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:49,085 INFO L225 Difference]: With dead ends: 78407 [2022-11-19 06:48:49,085 INFO L226 Difference]: Without dead ends: 52356 [2022-11-19 06:48:49,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:49,179 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 330 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:49,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 555 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:48:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52356 states.