./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh --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 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d --- 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-2329fc7 [2022-12-14 08:33:49,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:33:49,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:33:49,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:33:49,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:33:49,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:33:49,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:33:49,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:33:49,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:33:49,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:33:49,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:33:49,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:33:49,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:33:49,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:33:49,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:33:49,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:33:49,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:33:49,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:33:49,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:33:49,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:33:49,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:33:49,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:33:49,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:33:49,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:33:49,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:33:49,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:33:49,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:33:49,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:33:49,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:33:49,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:33:49,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:33:49,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:33:49,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:33:49,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:33:49,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:33:49,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:33:49,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:33:49,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:33:49,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:33:49,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:33:49,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:33:49,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:33:49,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:33:49,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:33:49,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:33:49,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:33:49,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:33:49,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:33:49,846 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:33:49,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:33:49,846 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:33:49,846 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:33:49,846 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:33:49,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:33:49,847 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:33:49,847 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:33:49,847 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:33:49,847 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:33:49,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:33:49,848 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:33:49,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:33:49,848 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:33:49,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:33:49,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:33:49,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:33:49,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:33:49,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:33:49,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:33:49,849 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:33:49,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:33:49,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:33:49,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:33:49,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:33:49,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:33:49,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:33:49,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:33:49,851 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:33:49,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:33:49,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:33:49,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:33:49,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:33:49,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:33:49,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:33:49,852 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_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d [2022-12-14 08:33:50,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:33:50,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:33:50,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:33:50,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:33:50,057 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:33:50,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2022-12-14 08:33:52,627 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:33:52,762 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:33:52,763 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2022-12-14 08:33:52,770 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/data/d2c1294b1/2c214165816e40289a4180661f22c1b6/FLAG78fed78f3 [2022-12-14 08:33:52,784 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/data/d2c1294b1/2c214165816e40289a4180661f22c1b6 [2022-12-14 08:33:52,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:33:52,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:33:52,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:33:52,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:33:52,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:33:52,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:33:52" (1/1) ... [2022-12-14 08:33:52,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16136a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:52, skipping insertion in model container [2022-12-14 08:33:52,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:33:52" (1/1) ... [2022-12-14 08:33:52,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:33:52,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:33:52,954 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2022-12-14 08:33:53,000 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2022-12-14 08:33:53,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:33:53,044 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:33:53,054 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2022-12-14 08:33:53,068 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2022-12-14 08:33:53,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:33:53,097 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:33:53,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53 WrapperNode [2022-12-14 08:33:53,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:33:53,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:33:53,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:33:53,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:33:53,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,141 INFO L138 Inliner]: procedures = 57, calls = 64, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 465 [2022-12-14 08:33:53,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:33:53,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:33:53,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:33:53,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:33:53,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,172 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:33:53,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:33:53,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:33:53,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:33:53,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (1/1) ... [2022-12-14 08:33:53,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:33:53,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:33:53,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:33:53,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:33:53,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:33:53,228 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 08:33:53,228 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 08:33:53,228 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 08:33:53,229 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 08:33:53,229 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 08:33:53,229 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 08:33:53,229 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 08:33:53,229 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 08:33:53,229 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 08:33:53,229 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 08:33:53,229 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 08:33:53,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 08:33:53,230 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 08:33:53,230 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 08:33:53,230 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 08:33:53,230 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 08:33:53,230 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 08:33:53,230 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 08:33:53,230 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 08:33:53,230 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 08:33:53,231 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 08:33:53,231 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 08:33:53,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:33:53,231 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 08:33:53,231 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 08:33:53,231 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 08:33:53,231 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 08:33:53,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:33:53,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:33:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 08:33:53,232 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 08:33:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 08:33:53,232 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 08:33:53,301 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:33:53,303 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:33:53,712 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:33:53,813 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:33:53,813 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 08:33:53,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:33:53 BoogieIcfgContainer [2022-12-14 08:33:53,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:33:53,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:33:53,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:33:53,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:33:53,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:33:52" (1/3) ... [2022-12-14 08:33:53,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ecb065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:33:53, skipping insertion in model container [2022-12-14 08:33:53,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:33:53" (2/3) ... [2022-12-14 08:33:53,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ecb065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:33:53, skipping insertion in model container [2022-12-14 08:33:53,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:33:53" (3/3) ... [2022-12-14 08:33:53,822 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2022-12-14 08:33:53,837 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:33:53,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 08:33:53,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:33:53,878 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;@6c8592c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:33:53,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 08:33:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 106 states have (on average 1.5) internal successors, (159), 114 states have internal predecessors, (159), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-12-14 08:33:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 08:33:53,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:33:53,890 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] [2022-12-14 08:33:53,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:33:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:33:53,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1265941186, now seen corresponding path program 1 times [2022-12-14 08:33:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:33:53,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117661633] [2022-12-14 08:33:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:53,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:33:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:33:54,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:33:54,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117661633] [2022-12-14 08:33:54,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117661633] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:33:54,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:33:54,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:33:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783607716] [2022-12-14 08:33:54,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:33:54,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:33:54,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:33:54,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:33:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:33:54,172 INFO L87 Difference]: Start difference. First operand has 156 states, 106 states have (on average 1.5) internal successors, (159), 114 states have internal predecessors, (159), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:33:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:33:54,671 INFO L93 Difference]: Finished difference Result 573 states and 853 transitions. [2022-12-14 08:33:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:33:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-12-14 08:33:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:33:54,682 INFO L225 Difference]: With dead ends: 573 [2022-12-14 08:33:54,682 INFO L226 Difference]: Without dead ends: 412 [2022-12-14 08:33:54,685 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 [2022-12-14 08:33:54,687 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 545 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:33:54,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 603 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:33:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-12-14 08:33:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 399. [2022-12-14 08:33:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 283 states have (on average 1.3886925795053005) internal successors, (393), 291 states have internal predecessors, (393), 77 states have call successors, (77), 39 states have call predecessors, (77), 37 states have return successors, (95), 70 states have call predecessors, (95), 73 states have call successors, (95) [2022-12-14 08:33:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 565 transitions. [2022-12-14 08:33:54,768 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 565 transitions. Word has length 38 [2022-12-14 08:33:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:33:54,769 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 565 transitions. [2022-12-14 08:33:54,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:33:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 565 transitions. [2022-12-14 08:33:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 08:33:54,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:33:54,772 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] [2022-12-14 08:33:54,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:33:54,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:33:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:33:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1533741838, now seen corresponding path program 1 times [2022-12-14 08:33:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:33:54,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117362116] [2022-12-14 08:33:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:54,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:33:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:33:54,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:33:54,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117362116] [2022-12-14 08:33:54,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117362116] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:33:54,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:33:54,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:33:54,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930989548] [2022-12-14 08:33:54,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:33:54,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:33:54,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:33:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:33:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:33:54,866 INFO L87 Difference]: Start difference. First operand 399 states and 565 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) [2022-12-14 08:33:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:33:55,426 INFO L93 Difference]: Finished difference Result 874 states and 1195 transitions. [2022-12-14 08:33:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:33:55,427 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 [2022-12-14 08:33:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:33:55,433 INFO L225 Difference]: With dead ends: 874 [2022-12-14 08:33:55,433 INFO L226 Difference]: Without dead ends: 810 [2022-12-14 08:33:55,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:33:55,435 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 730 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:33:55,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 810 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:33:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-12-14 08:33:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 739. [2022-12-14 08:33:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 520 states have (on average 1.3307692307692307) internal successors, (692), 528 states have internal predecessors, (692), 132 states have call successors, (132), 87 states have call predecessors, (132), 85 states have return successors, (165), 125 states have call predecessors, (165), 128 states have call successors, (165) [2022-12-14 08:33:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 989 transitions. [2022-12-14 08:33:55,516 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 989 transitions. Word has length 45 [2022-12-14 08:33:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:33:55,517 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 989 transitions. [2022-12-14 08:33:55,517 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) [2022-12-14 08:33:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 989 transitions. [2022-12-14 08:33:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 08:33:55,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:33:55,519 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] [2022-12-14 08:33:55,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:33:55,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:33:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:33:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash -178178675, now seen corresponding path program 1 times [2022-12-14 08:33:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:33:55,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257150767] [2022-12-14 08:33:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:55,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:33:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:33:55,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:33:55,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257150767] [2022-12-14 08:33:55,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257150767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:33:55,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:33:55,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 08:33:55,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350601666] [2022-12-14 08:33:55,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:33:55,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:33:55,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:33:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:33:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:33:55,698 INFO L87 Difference]: Start difference. First operand 739 states and 989 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) [2022-12-14 08:33:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:33:56,151 INFO L93 Difference]: Finished difference Result 1500 states and 1936 transitions. [2022-12-14 08:33:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:33:56,152 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 [2022-12-14 08:33:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:33:56,158 INFO L225 Difference]: With dead ends: 1500 [2022-12-14 08:33:56,159 INFO L226 Difference]: Without dead ends: 1097 [2022-12-14 08:33:56,161 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 [2022-12-14 08:33:56,162 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 319 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:33:56,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 549 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:33:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-12-14 08:33:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1068. [2022-12-14 08:33:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 743 states have (on average 1.2960969044414536) internal successors, (963), 752 states have internal predecessors, (963), 188 states have call successors, (188), 135 states have call predecessors, (188), 135 states have return successors, (239), 182 states have call predecessors, (239), 184 states have call successors, (239) [2022-12-14 08:33:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1390 transitions. [2022-12-14 08:33:56,277 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1390 transitions. Word has length 46 [2022-12-14 08:33:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:33:56,278 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1390 transitions. [2022-12-14 08:33:56,278 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) [2022-12-14 08:33:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1390 transitions. [2022-12-14 08:33:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 08:33:56,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:33:56,280 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, 1] [2022-12-14 08:33:56,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:33:56,280 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:33:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:33:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash -545333537, now seen corresponding path program 1 times [2022-12-14 08:33:56,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:33:56,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148625836] [2022-12-14 08:33:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:56,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:33:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:33:56,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:33:56,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148625836] [2022-12-14 08:33:56,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148625836] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:33:56,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:33:56,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:33:56,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604027178] [2022-12-14 08:33:56,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:33:56,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:33:56,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:33:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:33:56,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:33:56,331 INFO L87 Difference]: Start difference. First operand 1068 states and 1390 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) [2022-12-14 08:33:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:33:56,460 INFO L93 Difference]: Finished difference Result 2009 states and 2549 transitions. [2022-12-14 08:33:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:33:56,460 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 [2022-12-14 08:33:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:33:56,464 INFO L225 Difference]: With dead ends: 2009 [2022-12-14 08:33:56,464 INFO L226 Difference]: Without dead ends: 1327 [2022-12-14 08:33:56,466 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 [2022-12-14 08:33:56,467 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 68 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:33:56,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 337 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:33:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-12-14 08:33:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1305. [2022-12-14 08:33:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 904 states have (on average 1.279867256637168) internal successors, (1157), 913 states have internal predecessors, (1157), 230 states have call successors, (230), 173 states have call predecessors, (230), 169 states have return successors, (285), 220 states have call predecessors, (285), 226 states have call successors, (285) [2022-12-14 08:33:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1672 transitions. [2022-12-14 08:33:56,533 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1672 transitions. Word has length 47 [2022-12-14 08:33:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:33:56,533 INFO L495 AbstractCegarLoop]: Abstraction has 1305 states and 1672 transitions. [2022-12-14 08:33:56,534 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) [2022-12-14 08:33:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1672 transitions. [2022-12-14 08:33:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 08:33:56,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:33:56,535 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] [2022-12-14 08:33:56,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:33:56,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:33:56,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:33:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1893085611, now seen corresponding path program 1 times [2022-12-14 08:33:56,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:33:56,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193794100] [2022-12-14 08:33:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:56,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:33:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:33:56,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:33:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193794100] [2022-12-14 08:33:56,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193794100] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:33:56,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:33:56,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:33:56,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710468167] [2022-12-14 08:33:56,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:33:56,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:33:56,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:33:56,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:33:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:33:56,572 INFO L87 Difference]: Start difference. First operand 1305 states and 1672 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) [2022-12-14 08:33:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:33:56,675 INFO L93 Difference]: Finished difference Result 1711 states and 2162 transitions. [2022-12-14 08:33:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:33:56,676 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 [2022-12-14 08:33:56,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:33:56,679 INFO L225 Difference]: With dead ends: 1711 [2022-12-14 08:33:56,679 INFO L226 Difference]: Without dead ends: 1156 [2022-12-14 08:33:56,680 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 [2022-12-14 08:33:56,681 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 175 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:33:56,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 246 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:33:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-12-14 08:33:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 950. [2022-12-14 08:33:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 668 states have (on average 1.278443113772455) internal successors, (854), 676 states have internal predecessors, (854), 167 states have call successors, (167), 119 states have call predecessors, (167), 113 states have return successors, (193), 156 states have call predecessors, (193), 163 states have call successors, (193) [2022-12-14 08:33:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1214 transitions. [2022-12-14 08:33:56,734 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1214 transitions. Word has length 53 [2022-12-14 08:33:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:33:56,735 INFO L495 AbstractCegarLoop]: Abstraction has 950 states and 1214 transitions. [2022-12-14 08:33:56,735 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) [2022-12-14 08:33:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1214 transitions. [2022-12-14 08:33:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 08:33:56,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:33:56,736 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] [2022-12-14 08:33:56,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:33:56,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:33:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:33:56,737 INFO L85 PathProgramCache]: Analyzing trace with hash 928281771, now seen corresponding path program 1 times [2022-12-14 08:33:56,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:33:56,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278344123] [2022-12-14 08:33:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:33:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:33:56,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:33:56,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278344123] [2022-12-14 08:33:56,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278344123] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:33:56,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:33:56,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:33:56,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064407067] [2022-12-14 08:33:56,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:33:56,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:33:56,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:33:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:33:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:33:56,791 INFO L87 Difference]: Start difference. First operand 950 states and 1214 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) [2022-12-14 08:33:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:33:57,007 INFO L93 Difference]: Finished difference Result 1205 states and 1515 transitions. [2022-12-14 08:33:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:33:57,007 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 [2022-12-14 08:33:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:33:57,012 INFO L225 Difference]: With dead ends: 1205 [2022-12-14 08:33:57,012 INFO L226 Difference]: Without dead ends: 1202 [2022-12-14 08:33:57,013 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 [2022-12-14 08:33:57,014 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 325 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:33:57,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 225 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:33:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-12-14 08:33:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 949. [2022-12-14 08:33:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 668 states have (on average 1.2694610778443114) internal successors, (848), 675 states have internal predecessors, (848), 166 states have call successors, (166), 119 states have call predecessors, (166), 113 states have return successors, (193), 156 states have call predecessors, (193), 163 states have call successors, (193) [2022-12-14 08:33:57,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1207 transitions. [2022-12-14 08:33:57,085 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1207 transitions. Word has length 54 [2022-12-14 08:33:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:33:57,085 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1207 transitions. [2022-12-14 08:33:57,085 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) [2022-12-14 08:33:57,085 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1207 transitions. [2022-12-14 08:33:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 08:33:57,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:33:57,087 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] [2022-12-14 08:33:57,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:33:57,087 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:33:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:33:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1288763960, now seen corresponding path program 1 times [2022-12-14 08:33:57,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:33:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472897187] [2022-12-14 08:33:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:33:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:33:57,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:33:57,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472897187] [2022-12-14 08:33:57,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472897187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:33:57,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119458489] [2022-12-14 08:33:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:33:57,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:33:57,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:33:57,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:33:57,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:33:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:33:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:33:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:33:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:33:57,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:33:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:33:57,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119458489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:33:57,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056912518] [2022-12-14 08:33:57,634 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 08:33:57,634 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:33:57,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:33:57,640 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:33:57,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:33:58,948 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 105 for LOIs [2022-12-14 08:33:58,960 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 73 for LOIs [2022-12-14 08:33:58,964 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 101 for LOIs [2022-12-14 08:33:58,972 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 109 for LOIs [2022-12-14 08:33:59,161 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 105 for LOIs [2022-12-14 08:33:59,185 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 105 for LOIs [2022-12-14 08:33:59,210 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 105 for LOIs [2022-12-14 08:33:59,221 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 112 for LOIs [2022-12-14 08:33:59,231 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:34:05,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20209#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~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) (= ~E_1~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:34:05,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:34:05,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:34:05,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 08:34:05,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013217589] [2022-12-14 08:34:05,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:34:05,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:34:05,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:05,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:34:05,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 08:34:05,277 INFO L87 Difference]: Start difference. First operand 949 states and 1207 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 08:34:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:05,805 INFO L93 Difference]: Finished difference Result 2179 states and 2658 transitions. [2022-12-14 08:34:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:34:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-12-14 08:34:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:05,812 INFO L225 Difference]: With dead ends: 2179 [2022-12-14 08:34:05,812 INFO L226 Difference]: Without dead ends: 2176 [2022-12-14 08:34:05,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 08:34:05,813 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 526 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:05,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 837 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:34:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2022-12-14 08:34:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1769. [2022-12-14 08:34:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1231 states have (on average 1.2380178716490657) internal successors, (1524), 1238 states have internal predecessors, (1524), 306 states have call successors, (306), 244 states have call predecessors, (306), 230 states have return successors, (345), 288 states have call predecessors, (345), 303 states have call successors, (345) [2022-12-14 08:34:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2175 transitions. [2022-12-14 08:34:05,963 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2175 transitions. Word has length 55 [2022-12-14 08:34:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:05,964 INFO L495 AbstractCegarLoop]: Abstraction has 1769 states and 2175 transitions. [2022-12-14 08:34:05,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 08:34:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2175 transitions. [2022-12-14 08:34:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 08:34:05,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:05,966 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 08:34:05,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:34:06,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:06,167 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1775464853, now seen corresponding path program 2 times [2022-12-14 08:34:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:06,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091786786] [2022-12-14 08:34:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:06,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:34:06,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091786786] [2022-12-14 08:34:06,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091786786] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:06,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:34:06,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:34:06,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232717768] [2022-12-14 08:34:06,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:06,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:06,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:34:06,204 INFO L87 Difference]: Start difference. First operand 1769 states and 2175 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2022-12-14 08:34:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:06,352 INFO L93 Difference]: Finished difference Result 2461 states and 2985 transitions. [2022-12-14 08:34:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:06,352 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), 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 58 [2022-12-14 08:34:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:06,356 INFO L225 Difference]: With dead ends: 2461 [2022-12-14 08:34:06,356 INFO L226 Difference]: Without dead ends: 1315 [2022-12-14 08:34:06,358 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 [2022-12-14 08:34:06,359 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 180 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:06,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 283 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:34:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-12-14 08:34:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1305. [2022-12-14 08:34:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 919 states have (on average 1.2328618063112078) internal successors, (1133), 926 states have internal predecessors, (1133), 222 states have call successors, (222), 168 states have call predecessors, (222), 162 states have return successors, (253), 212 states have call predecessors, (253), 219 states have call successors, (253) [2022-12-14 08:34:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1608 transitions. [2022-12-14 08:34:06,449 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1608 transitions. Word has length 58 [2022-12-14 08:34:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:06,450 INFO L495 AbstractCegarLoop]: Abstraction has 1305 states and 1608 transitions. [2022-12-14 08:34:06,450 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), 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) [2022-12-14 08:34:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1608 transitions. [2022-12-14 08:34:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 08:34:06,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:06,451 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] [2022-12-14 08:34:06,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:34:06,451 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:06,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:06,452 INFO L85 PathProgramCache]: Analyzing trace with hash 4085595, now seen corresponding path program 1 times [2022-12-14 08:34:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:06,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881484537] [2022-12-14 08:34:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:34:06,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881484537] [2022-12-14 08:34:06,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881484537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:06,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:34:06,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:34:06,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957528157] [2022-12-14 08:34:06,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:06,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:34:06,487 INFO L87 Difference]: Start difference. First operand 1305 states and 1608 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) [2022-12-14 08:34:06,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:06,649 INFO L93 Difference]: Finished difference Result 2145 states and 2584 transitions. [2022-12-14 08:34:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:06,650 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 [2022-12-14 08:34:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:06,655 INFO L225 Difference]: With dead ends: 2145 [2022-12-14 08:34:06,655 INFO L226 Difference]: Without dead ends: 1623 [2022-12-14 08:34:06,656 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 [2022-12-14 08:34:06,656 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 43 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:06,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 373 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:34:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-12-14 08:34:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1458. [2022-12-14 08:34:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1026 states have (on average 1.2251461988304093) internal successors, (1257), 1037 states have internal predecessors, (1257), 247 states have call successors, (247), 193 states have call predecessors, (247), 183 states have return successors, (278), 229 states have call predecessors, (278), 244 states have call successors, (278) [2022-12-14 08:34:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1782 transitions. [2022-12-14 08:34:06,792 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1782 transitions. Word has length 61 [2022-12-14 08:34:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:06,792 INFO L495 AbstractCegarLoop]: Abstraction has 1458 states and 1782 transitions. [2022-12-14 08:34:06,792 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) [2022-12-14 08:34:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1782 transitions. [2022-12-14 08:34:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 08:34:06,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:06,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:34:06,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:34:06,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1945089823, now seen corresponding path program 1 times [2022-12-14 08:34:06,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:06,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3555550] [2022-12-14 08:34:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:06,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:34:06,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:06,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3555550] [2022-12-14 08:34:06,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3555550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:06,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:34:06,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:34:06,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253666661] [2022-12-14 08:34:06,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:06,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:34:06,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:06,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:34:06,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:34:06,965 INFO L87 Difference]: Start difference. First operand 1458 states and 1782 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:34:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:07,338 INFO L93 Difference]: Finished difference Result 1994 states and 2575 transitions. [2022-12-14 08:34:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:34:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2022-12-14 08:34:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:07,342 INFO L225 Difference]: With dead ends: 1994 [2022-12-14 08:34:07,342 INFO L226 Difference]: Without dead ends: 1670 [2022-12-14 08:34:07,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:34:07,344 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 330 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:07,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 518 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:34:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-12-14 08:34:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1638. [2022-12-14 08:34:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1155 states have (on average 1.2372294372294372) internal successors, (1429), 1168 states have internal predecessors, (1429), 280 states have call successors, (280), 211 states have call predecessors, (280), 201 states have return successors, (326), 260 states have call predecessors, (326), 277 states have call successors, (326) [2022-12-14 08:34:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2035 transitions. [2022-12-14 08:34:07,461 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2035 transitions. Word has length 67 [2022-12-14 08:34:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:07,461 INFO L495 AbstractCegarLoop]: Abstraction has 1638 states and 2035 transitions. [2022-12-14 08:34:07,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 08:34:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2035 transitions. [2022-12-14 08:34:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 08:34:07,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:07,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:34:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:34:07,463 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1740538686, now seen corresponding path program 1 times [2022-12-14 08:34:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:07,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380607585] [2022-12-14 08:34:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:34:07,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380607585] [2022-12-14 08:34:07,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380607585] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:07,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:34:07,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:34:07,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675499855] [2022-12-14 08:34:07,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:07,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:07,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:34:07,512 INFO L87 Difference]: Start difference. First operand 1638 states and 2035 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-12-14 08:34:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:07,721 INFO L93 Difference]: Finished difference Result 2187 states and 2839 transitions. [2022-12-14 08:34:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:07,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 68 [2022-12-14 08:34:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:07,727 INFO L225 Difference]: With dead ends: 2187 [2022-12-14 08:34:07,727 INFO L226 Difference]: Without dead ends: 1745 [2022-12-14 08:34:07,729 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 [2022-12-14 08:34:07,729 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 37 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:07,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 377 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:34:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-12-14 08:34:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1684. [2022-12-14 08:34:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1195 states have (on average 1.2476987447698744) internal successors, (1491), 1208 states have internal predecessors, (1491), 283 states have call successors, (283), 214 states have call predecessors, (283), 204 states have return successors, (329), 263 states have call predecessors, (329), 280 states have call successors, (329) [2022-12-14 08:34:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2103 transitions. [2022-12-14 08:34:07,856 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2103 transitions. Word has length 68 [2022-12-14 08:34:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:07,856 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 2103 transitions. [2022-12-14 08:34:07,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-12-14 08:34:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2103 transitions. [2022-12-14 08:34:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 08:34:07,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:07,857 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 08:34:07,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:34:07,857 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2096762188, now seen corresponding path program 1 times [2022-12-14 08:34:07,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:07,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740958851] [2022-12-14 08:34:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:07,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:34:07,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:07,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740958851] [2022-12-14 08:34:07,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740958851] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:07,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:34:07,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 08:34:07,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638011640] [2022-12-14 08:34:07,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:07,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:34:07,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:34:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:34:07,966 INFO L87 Difference]: Start difference. First operand 1684 states and 2103 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-12-14 08:34:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:08,538 INFO L93 Difference]: Finished difference Result 3274 states and 3928 transitions. [2022-12-14 08:34:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:34:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 70 [2022-12-14 08:34:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:08,544 INFO L225 Difference]: With dead ends: 3274 [2022-12-14 08:34:08,544 INFO L226 Difference]: Without dead ends: 2152 [2022-12-14 08:34:08,545 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 [2022-12-14 08:34:08,546 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 298 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:08,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 534 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:34:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-12-14 08:34:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 2045. [2022-12-14 08:34:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 1436 states have (on average 1.2207520891364902) internal successors, (1753), 1449 states have internal predecessors, (1753), 347 states have call successors, (347), 270 states have call predecessors, (347), 260 states have return successors, (393), 327 states have call predecessors, (393), 344 states have call successors, (393) [2022-12-14 08:34:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 2493 transitions. [2022-12-14 08:34:08,730 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 2493 transitions. Word has length 70 [2022-12-14 08:34:08,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:08,730 INFO L495 AbstractCegarLoop]: Abstraction has 2045 states and 2493 transitions. [2022-12-14 08:34:08,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2022-12-14 08:34:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 2493 transitions. [2022-12-14 08:34:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 08:34:08,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:08,732 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] [2022-12-14 08:34:08,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 08:34:08,732 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:08,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:08,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1881449289, now seen corresponding path program 1 times [2022-12-14 08:34:08,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:08,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723441784] [2022-12-14 08:34:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:08,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:34:08,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:08,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723441784] [2022-12-14 08:34:08,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723441784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:08,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:34:08,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:34:08,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147251374] [2022-12-14 08:34:08,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:08,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:34:08,764 INFO L87 Difference]: Start difference. First operand 2045 states and 2493 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) [2022-12-14 08:34:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:09,052 INFO L93 Difference]: Finished difference Result 3642 states and 4321 transitions. [2022-12-14 08:34:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:09,053 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 [2022-12-14 08:34:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:09,062 INFO L225 Difference]: With dead ends: 3642 [2022-12-14 08:34:09,062 INFO L226 Difference]: Without dead ends: 2263 [2022-12-14 08:34:09,064 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 [2022-12-14 08:34:09,064 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 38 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:09,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 367 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:34:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-12-14 08:34:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2182. [2022-12-14 08:34:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 1533 states have (on average 1.2165688193085453) internal successors, (1865), 1552 states have internal predecessors, (1865), 368 states have call successors, (368), 291 states have call predecessors, (368), 279 states have return successors, (420), 340 states have call predecessors, (420), 365 states have call successors, (420) [2022-12-14 08:34:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2653 transitions. [2022-12-14 08:34:09,244 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2653 transitions. Word has length 71 [2022-12-14 08:34:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:09,245 INFO L495 AbstractCegarLoop]: Abstraction has 2182 states and 2653 transitions. [2022-12-14 08:34:09,245 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) [2022-12-14 08:34:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2653 transitions. [2022-12-14 08:34:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 08:34:09,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:09,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:09,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 08:34:09,247 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash 159111491, now seen corresponding path program 1 times [2022-12-14 08:34:09,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:09,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790409262] [2022-12-14 08:34:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:34:09,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:09,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790409262] [2022-12-14 08:34:09,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790409262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:09,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:34:09,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:34:09,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764225060] [2022-12-14 08:34:09,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:09,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:09,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:09,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:34:09,281 INFO L87 Difference]: Start difference. First operand 2182 states and 2653 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:34:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:09,537 INFO L93 Difference]: Finished difference Result 3248 states and 4221 transitions. [2022-12-14 08:34:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:09,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2022-12-14 08:34:09,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:09,544 INFO L225 Difference]: With dead ends: 3248 [2022-12-14 08:34:09,544 INFO L226 Difference]: Without dead ends: 2697 [2022-12-14 08:34:09,546 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 [2022-12-14 08:34:09,546 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 169 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:09,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 262 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:34:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2022-12-14 08:34:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2682. [2022-12-14 08:34:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 1897 states have (on average 1.2377438060094887) internal successors, (2348), 1921 states have internal predecessors, (2348), 453 states have call successors, (453), 342 states have call predecessors, (453), 330 states have return successors, (535), 420 states have call predecessors, (535), 450 states have call successors, (535) [2022-12-14 08:34:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 3336 transitions. [2022-12-14 08:34:09,807 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 3336 transitions. Word has length 88 [2022-12-14 08:34:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:09,807 INFO L495 AbstractCegarLoop]: Abstraction has 2682 states and 3336 transitions. [2022-12-14 08:34:09,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:34:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 3336 transitions. [2022-12-14 08:34:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 08:34:09,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:09,811 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] [2022-12-14 08:34:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 08:34:09,811 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash 360534428, now seen corresponding path program 1 times [2022-12-14 08:34:09,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:09,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783175209] [2022-12-14 08:34:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 08:34:10,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:10,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783175209] [2022-12-14 08:34:10,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783175209] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:10,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336239333] [2022-12-14 08:34:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:10,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:10,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:10,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:10,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:34:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:34:10,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:34:10,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:10,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336239333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:10,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:10,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-14 08:34:10,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619807531] [2022-12-14 08:34:10,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:10,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:34:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:34:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:34:10,161 INFO L87 Difference]: Start difference. First operand 2682 states and 3336 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) [2022-12-14 08:34:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:10,510 INFO L93 Difference]: Finished difference Result 4086 states and 4997 transitions. [2022-12-14 08:34:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:34:10,511 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 [2022-12-14 08:34:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:10,518 INFO L225 Difference]: With dead ends: 4086 [2022-12-14 08:34:10,518 INFO L226 Difference]: Without dead ends: 2466 [2022-12-14 08:34:10,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:34:10,521 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 172 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:10,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 798 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:34:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2022-12-14 08:34:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2177. [2022-12-14 08:34:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 1582 states have (on average 1.259165613147914) internal successors, (1992), 1604 states have internal predecessors, (1992), 349 states have call successors, (349), 252 states have call predecessors, (349), 244 states have return successors, (425), 322 states have call predecessors, (425), 346 states have call successors, (425) [2022-12-14 08:34:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 2766 transitions. [2022-12-14 08:34:10,695 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 2766 transitions. Word has length 102 [2022-12-14 08:34:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:10,695 INFO L495 AbstractCegarLoop]: Abstraction has 2177 states and 2766 transitions. [2022-12-14 08:34:10,695 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) [2022-12-14 08:34:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 2766 transitions. [2022-12-14 08:34:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 08:34:10,698 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:10,698 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:10,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:34:10,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 08:34:10,900 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:10,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1251935951, now seen corresponding path program 1 times [2022-12-14 08:34:10,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:10,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915753755] [2022-12-14 08:34:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 08:34:11,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:11,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915753755] [2022-12-14 08:34:11,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915753755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:11,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182242127] [2022-12-14 08:34:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:11,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:11,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:11,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:11,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:34:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:11,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:34:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 08:34:11,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:11,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182242127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:11,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:11,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 08:34:11,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366902013] [2022-12-14 08:34:11,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:11,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:11,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:11,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:11,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:34:11,181 INFO L87 Difference]: Start difference. First operand 2177 states and 2766 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:34:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:11,385 INFO L93 Difference]: Finished difference Result 3183 states and 4192 transitions. [2022-12-14 08:34:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 99 [2022-12-14 08:34:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:11,392 INFO L225 Difference]: With dead ends: 3183 [2022-12-14 08:34:11,392 INFO L226 Difference]: Without dead ends: 2407 [2022-12-14 08:34:11,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:34:11,396 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 171 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:11,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 196 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:34:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2022-12-14 08:34:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2370. [2022-12-14 08:34:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 1746 states have (on average 1.2554410080183276) internal successors, (2192), 1766 states have internal predecessors, (2192), 355 states have call successors, (355), 274 states have call predecessors, (355), 267 states have return successors, (432), 331 states have call predecessors, (432), 352 states have call successors, (432) [2022-12-14 08:34:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 2979 transitions. [2022-12-14 08:34:11,649 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 2979 transitions. Word has length 99 [2022-12-14 08:34:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:11,650 INFO L495 AbstractCegarLoop]: Abstraction has 2370 states and 2979 transitions. [2022-12-14 08:34:11,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:34:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 2979 transitions. [2022-12-14 08:34:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 08:34:11,652 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:11,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:11,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:34:11,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 08:34:11,853 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash -805668080, now seen corresponding path program 1 times [2022-12-14 08:34:11,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444174769] [2022-12-14 08:34:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:11,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 08:34:11,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:11,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444174769] [2022-12-14 08:34:11,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444174769] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:11,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826017770] [2022-12-14 08:34:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:11,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:11,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:11,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:11,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:34:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:12,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:34:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:34:12,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:12,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826017770] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:12,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:12,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 08:34:12,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997156227] [2022-12-14 08:34:12,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:12,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:12,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:12,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:12,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:34:12,029 INFO L87 Difference]: Start difference. First operand 2370 states and 2979 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:34:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:12,333 INFO L93 Difference]: Finished difference Result 3511 states and 4549 transitions. [2022-12-14 08:34:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 99 [2022-12-14 08:34:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:12,342 INFO L225 Difference]: With dead ends: 3511 [2022-12-14 08:34:12,342 INFO L226 Difference]: Without dead ends: 2596 [2022-12-14 08:34:12,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:34:12,346 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 53 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:12,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 380 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:34:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2022-12-14 08:34:12,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2446. [2022-12-14 08:34:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 1810 states have (on average 1.2640883977900552) internal successors, (2288), 1830 states have internal predecessors, (2288), 361 states have call successors, (361), 280 states have call predecessors, (361), 273 states have return successors, (438), 337 states have call predecessors, (438), 358 states have call successors, (438) [2022-12-14 08:34:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3087 transitions. [2022-12-14 08:34:12,558 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3087 transitions. Word has length 99 [2022-12-14 08:34:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:12,558 INFO L495 AbstractCegarLoop]: Abstraction has 2446 states and 3087 transitions. [2022-12-14 08:34:12,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:34:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3087 transitions. [2022-12-14 08:34:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 08:34:12,560 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:12,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:12,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:34:12,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 08:34:12,762 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash -733593679, now seen corresponding path program 2 times [2022-12-14 08:34:12,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:12,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492346573] [2022-12-14 08:34:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:34:12,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:12,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492346573] [2022-12-14 08:34:12,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492346573] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:12,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149406254] [2022-12-14 08:34:12,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:34:12,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:12,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:12,902 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:12,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:34:12,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:34:12,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:34:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:34:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:34:12,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:12,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149406254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:12,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:12,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:34:12,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908099442] [2022-12-14 08:34:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:12,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:12,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:12,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:12,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:34:12,991 INFO L87 Difference]: Start difference. First operand 2446 states and 3087 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:34:13,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:13,245 INFO L93 Difference]: Finished difference Result 3701 states and 4889 transitions. [2022-12-14 08:34:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:13,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 99 [2022-12-14 08:34:13,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:13,252 INFO L225 Difference]: With dead ends: 3701 [2022-12-14 08:34:13,252 INFO L226 Difference]: Without dead ends: 2710 [2022-12-14 08:34:13,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:34:13,255 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 98 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:13,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 388 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:34:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2022-12-14 08:34:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2670. [2022-12-14 08:34:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2670 states, 1986 states have (on average 1.2628398791540785) internal successors, (2508), 2008 states have internal predecessors, (2508), 389 states have call successors, (389), 301 states have call predecessors, (389), 293 states have return successors, (491), 362 states have call predecessors, (491), 386 states have call successors, (491) [2022-12-14 08:34:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2670 states to 2670 states and 3388 transitions. [2022-12-14 08:34:13,537 INFO L78 Accepts]: Start accepts. Automaton has 2670 states and 3388 transitions. Word has length 99 [2022-12-14 08:34:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:13,538 INFO L495 AbstractCegarLoop]: Abstraction has 2670 states and 3388 transitions. [2022-12-14 08:34:13,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:34:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2670 states and 3388 transitions. [2022-12-14 08:34:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 08:34:13,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:13,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:13,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:34:13,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 08:34:13,742 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2103623105, now seen corresponding path program 1 times [2022-12-14 08:34:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:13,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803872461] [2022-12-14 08:34:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:13,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 08:34:13,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803872461] [2022-12-14 08:34:13,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803872461] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072464694] [2022-12-14 08:34:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:13,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:13,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:13,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:34:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:13,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:34:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:34:13,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:13,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072464694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:13,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:13,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 08:34:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551449944] [2022-12-14 08:34:13,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:13,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:13,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:34:13,992 INFO L87 Difference]: Start difference. First operand 2670 states and 3388 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:34:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:14,286 INFO L93 Difference]: Finished difference Result 4785 states and 6289 transitions. [2022-12-14 08:34:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:14,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2022-12-14 08:34:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:14,294 INFO L225 Difference]: With dead ends: 4785 [2022-12-14 08:34:14,294 INFO L226 Difference]: Without dead ends: 3242 [2022-12-14 08:34:14,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:34:14,297 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 50 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:14,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 342 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:34:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2022-12-14 08:34:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2840. [2022-12-14 08:34:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2128 states have (on average 1.275375939849624) internal successors, (2714), 2151 states have internal predecessors, (2714), 403 states have call successors, (403), 315 states have call predecessors, (403), 307 states have return successors, (505), 375 states have call predecessors, (505), 400 states have call successors, (505) [2022-12-14 08:34:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3622 transitions. [2022-12-14 08:34:14,521 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3622 transitions. Word has length 100 [2022-12-14 08:34:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:14,522 INFO L495 AbstractCegarLoop]: Abstraction has 2840 states and 3622 transitions. [2022-12-14 08:34:14,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:34:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3622 transitions. [2022-12-14 08:34:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 08:34:14,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:14,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:14,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:34:14,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:14,726 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:14,727 INFO L85 PathProgramCache]: Analyzing trace with hash 998271835, now seen corresponding path program 1 times [2022-12-14 08:34:14,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:14,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995282715] [2022-12-14 08:34:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:14,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 08:34:14,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:14,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995282715] [2022-12-14 08:34:14,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995282715] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:14,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952001371] [2022-12-14 08:34:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:14,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:14,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:14,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:14,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:34:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:14,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:34:14,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:34:14,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:14,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952001371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:14,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:14,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 08:34:14,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783875816] [2022-12-14 08:34:14,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:14,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:14,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:34:14,875 INFO L87 Difference]: Start difference. First operand 2840 states and 3622 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:34:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:15,186 INFO L93 Difference]: Finished difference Result 4356 states and 5746 transitions. [2022-12-14 08:34:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:15,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2022-12-14 08:34:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:15,193 INFO L225 Difference]: With dead ends: 4356 [2022-12-14 08:34:15,193 INFO L226 Difference]: Without dead ends: 3451 [2022-12-14 08:34:15,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:34:15,195 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 58 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:15,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 400 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:34:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2022-12-14 08:34:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3083. [2022-12-14 08:34:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 2327 states have (on average 1.284486463257413) internal successors, (2989), 2350 states have internal predecessors, (2989), 425 states have call successors, (425), 337 states have call predecessors, (425), 329 states have return successors, (527), 397 states have call predecessors, (527), 422 states have call successors, (527) [2022-12-14 08:34:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 3941 transitions. [2022-12-14 08:34:15,441 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 3941 transitions. Word has length 101 [2022-12-14 08:34:15,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:15,441 INFO L495 AbstractCegarLoop]: Abstraction has 3083 states and 3941 transitions. [2022-12-14 08:34:15,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:34:15,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 3941 transitions. [2022-12-14 08:34:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 08:34:15,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:15,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:15,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:34:15,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:15,644 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -625043380, now seen corresponding path program 1 times [2022-12-14 08:34:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:15,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473271375] [2022-12-14 08:34:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:15,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:34:15,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:15,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473271375] [2022-12-14 08:34:15,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473271375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:15,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265293825] [2022-12-14 08:34:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:15,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:15,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:15,721 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:15,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:34:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:34:15,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:34:15,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:15,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265293825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:15,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:15,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-12-14 08:34:15,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31308710] [2022-12-14 08:34:15,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:15,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:34:15,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:34:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:34:15,865 INFO L87 Difference]: Start difference. First operand 3083 states and 3941 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:34:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:16,475 INFO L93 Difference]: Finished difference Result 5817 states and 7628 transitions. [2022-12-14 08:34:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:34:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 101 [2022-12-14 08:34:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:16,486 INFO L225 Difference]: With dead ends: 5817 [2022-12-14 08:34:16,486 INFO L226 Difference]: Without dead ends: 3861 [2022-12-14 08:34:16,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:34:16,492 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 318 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:16,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 397 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:34:16,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2022-12-14 08:34:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3857. [2022-12-14 08:34:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 2916 states have (on average 1.2805212620027435) internal successors, (3734), 2944 states have internal predecessors, (3734), 532 states have call successors, (532), 415 states have call predecessors, (532), 407 states have return successors, (672), 499 states have call predecessors, (672), 529 states have call successors, (672) [2022-12-14 08:34:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 4938 transitions. [2022-12-14 08:34:16,828 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 4938 transitions. Word has length 101 [2022-12-14 08:34:16,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:16,828 INFO L495 AbstractCegarLoop]: Abstraction has 3857 states and 4938 transitions. [2022-12-14 08:34:16,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 08:34:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 4938 transitions. [2022-12-14 08:34:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 08:34:16,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:16,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:16,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:34:17,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 08:34:17,032 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1196065192, now seen corresponding path program 1 times [2022-12-14 08:34:17,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:17,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036959344] [2022-12-14 08:34:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:17,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:34:17,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036959344] [2022-12-14 08:34:17,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036959344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653574898] [2022-12-14 08:34:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:17,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:17,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:17,068 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:17,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:34:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:17,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:34:17,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:34:17,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653574898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:17,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:17,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 08:34:17,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044189382] [2022-12-14 08:34:17,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:17,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:34:17,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:17,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:34:17,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:34:17,174 INFO L87 Difference]: Start difference. First operand 3857 states and 4938 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:34:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:17,624 INFO L93 Difference]: Finished difference Result 5792 states and 7740 transitions. [2022-12-14 08:34:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:34:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 102 [2022-12-14 08:34:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:17,632 INFO L225 Difference]: With dead ends: 5792 [2022-12-14 08:34:17,632 INFO L226 Difference]: Without dead ends: 3870 [2022-12-14 08:34:17,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:34:17,635 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 81 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:17,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 384 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:34:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2022-12-14 08:34:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3831. [2022-12-14 08:34:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 2890 states have (on average 1.2553633217993079) internal successors, (3628), 2918 states have internal predecessors, (3628), 532 states have call successors, (532), 415 states have call predecessors, (532), 407 states have return successors, (672), 499 states have call predecessors, (672), 529 states have call successors, (672) [2022-12-14 08:34:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 4832 transitions. [2022-12-14 08:34:17,978 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 4832 transitions. Word has length 102 [2022-12-14 08:34:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:17,978 INFO L495 AbstractCegarLoop]: Abstraction has 3831 states and 4832 transitions. [2022-12-14 08:34:17,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 08:34:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 4832 transitions. [2022-12-14 08:34:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 08:34:17,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:17,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:17,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 08:34:18,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 08:34:18,181 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1052526456, now seen corresponding path program 1 times [2022-12-14 08:34:18,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174574559] [2022-12-14 08:34:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:18,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 08:34:18,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:18,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174574559] [2022-12-14 08:34:18,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174574559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:18,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740930166] [2022-12-14 08:34:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:18,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:18,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:18,463 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:18,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:34:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:18,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:34:18,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:34:18,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:18,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740930166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:18,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:18,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2022-12-14 08:34:18,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512746568] [2022-12-14 08:34:18,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:18,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:34:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:34:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-14 08:34:18,643 INFO L87 Difference]: Start difference. First operand 3831 states and 4832 transitions. Second operand has 6 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 08:34:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:19,283 INFO L93 Difference]: Finished difference Result 5815 states and 7604 transitions. [2022-12-14 08:34:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:34:19,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 102 [2022-12-14 08:34:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:19,290 INFO L225 Difference]: With dead ends: 5815 [2022-12-14 08:34:19,291 INFO L226 Difference]: Without dead ends: 3932 [2022-12-14 08:34:19,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:34:19,295 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 239 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:19,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 261 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:34:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2022-12-14 08:34:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3916. [2022-12-14 08:34:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 2965 states have (on average 1.2401349072512649) internal successors, (3677), 2993 states have internal predecessors, (3677), 534 states have call successors, (534), 423 states have call predecessors, (534), 415 states have return successors, (675), 501 states have call predecessors, (675), 531 states have call successors, (675) [2022-12-14 08:34:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 4886 transitions. [2022-12-14 08:34:19,642 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 4886 transitions. Word has length 102 [2022-12-14 08:34:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:19,642 INFO L495 AbstractCegarLoop]: Abstraction has 3916 states and 4886 transitions. [2022-12-14 08:34:19,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 08:34:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 4886 transitions. [2022-12-14 08:34:19,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 08:34:19,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:19,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:19,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 08:34:19,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:19,846 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash -390063464, now seen corresponding path program 1 times [2022-12-14 08:34:19,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:19,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957846627] [2022-12-14 08:34:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 08:34:19,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:19,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957846627] [2022-12-14 08:34:19,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957846627] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:19,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574715393] [2022-12-14 08:34:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:19,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:19,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:19,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:19,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 08:34:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:20,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:34:20,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:34:20,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:20,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574715393] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:20,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:20,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-12-14 08:34:20,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879530029] [2022-12-14 08:34:20,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:20,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:34:20,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:34:20,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:34:20,078 INFO L87 Difference]: Start difference. First operand 3916 states and 4886 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:34:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:20,676 INFO L93 Difference]: Finished difference Result 7424 states and 9408 transitions. [2022-12-14 08:34:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:34:20,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 103 [2022-12-14 08:34:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:20,685 INFO L225 Difference]: With dead ends: 7424 [2022-12-14 08:34:20,685 INFO L226 Difference]: Without dead ends: 4921 [2022-12-14 08:34:20,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:34:20,690 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 214 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:20,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 328 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:34:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4921 states. [2022-12-14 08:34:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4921 to 4247. [2022-12-14 08:34:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4247 states, 3267 states have (on average 1.2206917661463117) internal successors, (3988), 3295 states have internal predecessors, (3988), 534 states have call successors, (534), 451 states have call predecessors, (534), 444 states have return successors, (700), 502 states have call predecessors, (700), 531 states have call successors, (700) [2022-12-14 08:34:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 5222 transitions. [2022-12-14 08:34:21,093 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 5222 transitions. Word has length 103 [2022-12-14 08:34:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:21,093 INFO L495 AbstractCegarLoop]: Abstraction has 4247 states and 5222 transitions. [2022-12-14 08:34:21,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:34:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 5222 transitions. [2022-12-14 08:34:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 08:34:21,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:21,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:21,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 08:34:21,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:21,297 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:21,299 INFO L85 PathProgramCache]: Analyzing trace with hash 650782380, now seen corresponding path program 1 times [2022-12-14 08:34:21,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:21,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122899570] [2022-12-14 08:34:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:21,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:34:21,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:21,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122899570] [2022-12-14 08:34:21,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122899570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:21,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:34:21,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:34:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972378704] [2022-12-14 08:34:21,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:21,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:34:21,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:34:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:34:21,408 INFO L87 Difference]: Start difference. First operand 4247 states and 5222 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:34:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:22,307 INFO L93 Difference]: Finished difference Result 9046 states and 11254 transitions. [2022-12-14 08:34:22,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:34:22,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 104 [2022-12-14 08:34:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:22,315 INFO L225 Difference]: With dead ends: 9046 [2022-12-14 08:34:22,315 INFO L226 Difference]: Without dead ends: 5226 [2022-12-14 08:34:22,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:34:22,320 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 106 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:22,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 428 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:34:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2022-12-14 08:34:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 5108. [2022-12-14 08:34:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 3900 states have (on average 1.2084615384615385) internal successors, (4713), 3931 states have internal predecessors, (4713), 664 states have call successors, (664), 553 states have call predecessors, (664), 542 states have return successors, (878), 625 states have call predecessors, (878), 661 states have call successors, (878) [2022-12-14 08:34:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 6255 transitions. [2022-12-14 08:34:22,826 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 6255 transitions. Word has length 104 [2022-12-14 08:34:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:22,826 INFO L495 AbstractCegarLoop]: Abstraction has 5108 states and 6255 transitions. [2022-12-14 08:34:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 08:34:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 6255 transitions. [2022-12-14 08:34:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 08:34:22,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:22,829 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:34:22,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 08:34:22,829 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash -550665108, now seen corresponding path program 1 times [2022-12-14 08:34:22,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:22,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389603219] [2022-12-14 08:34:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:22,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:34:22,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:22,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389603219] [2022-12-14 08:34:22,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389603219] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:22,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40595435] [2022-12-14 08:34:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:22,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:22,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:22,944 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:22,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:34:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:23,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:34:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:34:23,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:34:23,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40595435] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:23,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:34:23,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 08:34:23,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476256618] [2022-12-14 08:34:23,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:23,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:34:23,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:23,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:34:23,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:34:23,052 INFO L87 Difference]: Start difference. First operand 5108 states and 6255 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 08:34:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:34:23,827 INFO L93 Difference]: Finished difference Result 7848 states and 9625 transitions. [2022-12-14 08:34:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:34:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 104 [2022-12-14 08:34:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:34:23,836 INFO L225 Difference]: With dead ends: 7848 [2022-12-14 08:34:23,836 INFO L226 Difference]: Without dead ends: 5075 [2022-12-14 08:34:23,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:34:23,840 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 208 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:34:23,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 593 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:34:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2022-12-14 08:34:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4857. [2022-12-14 08:34:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4857 states, 3703 states have (on average 1.1933567377801781) internal successors, (4419), 3735 states have internal predecessors, (4419), 632 states have call successors, (632), 530 states have call predecessors, (632), 520 states have return successors, (803), 593 states have call predecessors, (803), 629 states have call successors, (803) [2022-12-14 08:34:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4857 states to 4857 states and 5854 transitions. [2022-12-14 08:34:24,459 INFO L78 Accepts]: Start accepts. Automaton has 4857 states and 5854 transitions. Word has length 104 [2022-12-14 08:34:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:34:24,460 INFO L495 AbstractCegarLoop]: Abstraction has 4857 states and 5854 transitions. [2022-12-14 08:34:24,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 08:34:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4857 states and 5854 transitions. [2022-12-14 08:34:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 08:34:24,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:34:24,462 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-12-14 08:34:24,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 08:34:24,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 08:34:24,663 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:34:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:34:24,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1453621746, now seen corresponding path program 1 times [2022-12-14 08:34:24,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:34:24,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48816575] [2022-12-14 08:34:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:24,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:34:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:34:24,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:34:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48816575] [2022-12-14 08:34:24,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48816575] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:34:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785320869] [2022-12-14 08:34:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:34:24,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:34:24,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:34:24,913 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:34:24,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 08:34:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:34:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 08:34:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:34:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:34:25,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:34:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 08:34:25,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785320869] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:34:25,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331289800] [2022-12-14 08:34:25,222 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-12-14 08:34:25,222 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:34:25,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:34:25,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:34:25,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:34:33,631 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 174 for LOIs [2022-12-14 08:34:35,602 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 120 for LOIs [2022-12-14 08:34:35,627 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 120 for LOIs [2022-12-14 08:34:35,645 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2022-12-14 08:34:35,758 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 66 for LOIs [2022-12-14 08:34:36,295 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 120 for LOIs [2022-12-14 08:34:36,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:34:51,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [331289800] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:34:51,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:34:51,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [13, 8, 6] total 63 [2022-12-14 08:34:51,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359430880] [2022-12-14 08:34:51,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:34:51,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 08:34:51,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:34:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 08:34:51,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 08:34:51,846 INFO L87 Difference]: Start difference. First operand 4857 states and 5854 transitions. Second operand has 44 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 08:35:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:35:23,834 INFO L93 Difference]: Finished difference Result 8511 states and 10308 transitions. [2022-12-14 08:35:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-14 08:35:23,835 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 110 [2022-12-14 08:35:23,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:35:23,844 INFO L225 Difference]: With dead ends: 8511 [2022-12-14 08:35:23,844 INFO L226 Difference]: Without dead ends: 4783 [2022-12-14 08:35:23,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 271 SyntacticMatches, 16 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6204 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=1551, Invalid=15219, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 08:35:23,852 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 451 mSDsluCounter, 2935 mSDsCounter, 0 mSdLazyCounter, 5422 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 3159 SdHoareTripleChecker+Invalid, 5656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 5422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:35:23,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 3159 Invalid, 5656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 5422 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-12-14 08:35:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2022-12-14 08:35:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4710. [2022-12-14 08:35:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4710 states, 3583 states have (on average 1.1830867987719789) internal successors, (4239), 3611 states have internal predecessors, (4239), 619 states have call successors, (619), 517 states have call predecessors, (619), 506 states have return successors, (755), 583 states have call predecessors, (755), 616 states have call successors, (755) [2022-12-14 08:35:24,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 5613 transitions. [2022-12-14 08:35:24,421 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 5613 transitions. Word has length 110 [2022-12-14 08:35:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:35:24,422 INFO L495 AbstractCegarLoop]: Abstraction has 4710 states and 5613 transitions. [2022-12-14 08:35:24,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 08:35:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 5613 transitions. [2022-12-14 08:35:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 08:35:24,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:35:24,425 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] [2022-12-14 08:35:24,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 08:35:24,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 08:35:24,626 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:35:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:35:24,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2022518316, now seen corresponding path program 1 times [2022-12-14 08:35:24,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:35:24,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018940703] [2022-12-14 08:35:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:24,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:35:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:35:24,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:35:24,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018940703] [2022-12-14 08:35:24,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018940703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:35:24,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334472011] [2022-12-14 08:35:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:24,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:35:24,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:35:24,725 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:35:24,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 08:35:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:24,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:35:24,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:35:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:35:24,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:35:24,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334472011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:35:24,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:35:24,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 08:35:24,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800386059] [2022-12-14 08:35:24,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:35:24,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:35:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:35:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:35:24,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:35:24,852 INFO L87 Difference]: Start difference. First operand 4710 states and 5613 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) [2022-12-14 08:35:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:35:25,470 INFO L93 Difference]: Finished difference Result 5496 states and 6508 transitions. [2022-12-14 08:35:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:35:25,470 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 [2022-12-14 08:35:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:35:25,477 INFO L225 Difference]: With dead ends: 5496 [2022-12-14 08:35:25,477 INFO L226 Difference]: Without dead ends: 4438 [2022-12-14 08:35:25,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:35:25,479 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 64 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:35:25,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 976 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:35:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2022-12-14 08:35:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 4320. [2022-12-14 08:35:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4320 states, 3303 states have (on average 1.1837723281864971) internal successors, (3910), 3325 states have internal predecessors, (3910), 560 states have call successors, (560), 462 states have call predecessors, (560), 455 states have return successors, (686), 534 states have call predecessors, (686), 557 states have call successors, (686) [2022-12-14 08:35:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4320 states to 4320 states and 5156 transitions. [2022-12-14 08:35:25,992 INFO L78 Accepts]: Start accepts. Automaton has 4320 states and 5156 transitions. Word has length 112 [2022-12-14 08:35:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:35:25,992 INFO L495 AbstractCegarLoop]: Abstraction has 4320 states and 5156 transitions. [2022-12-14 08:35:25,992 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) [2022-12-14 08:35:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4320 states and 5156 transitions. [2022-12-14 08:35:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 08:35:25,995 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:35:25,995 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] [2022-12-14 08:35:25,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 08:35:26,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 08:35:26,196 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:35:26,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:35:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1792650159, now seen corresponding path program 1 times [2022-12-14 08:35:26,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:35:26,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353464674] [2022-12-14 08:35:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:26,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:35:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:35:26,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:35:26,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353464674] [2022-12-14 08:35:26,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353464674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:35:26,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:35:26,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:35:26,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565819126] [2022-12-14 08:35:26,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:35:26,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:35:26,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:35:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:35:26,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:35:26,228 INFO L87 Difference]: Start difference. First operand 4320 states and 5156 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 08:35:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:35:26,827 INFO L93 Difference]: Finished difference Result 4813 states and 5714 transitions. [2022-12-14 08:35:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:35:26,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 113 [2022-12-14 08:35:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:35:26,833 INFO L225 Difference]: With dead ends: 4813 [2022-12-14 08:35:26,833 INFO L226 Difference]: Without dead ends: 4187 [2022-12-14 08:35:26,834 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 [2022-12-14 08:35:26,834 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 225 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:35:26,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 335 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:35:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2022-12-14 08:35:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 4140. [2022-12-14 08:35:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3175 states have (on average 1.1845669291338583) internal successors, (3761), 3195 states have internal predecessors, (3761), 532 states have call successors, (532), 436 states have call predecessors, (532), 431 states have return successors, (656), 510 states have call predecessors, (656), 529 states have call successors, (656) [2022-12-14 08:35:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 4949 transitions. [2022-12-14 08:35:27,324 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 4949 transitions. Word has length 113 [2022-12-14 08:35:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:35:27,325 INFO L495 AbstractCegarLoop]: Abstraction has 4140 states and 4949 transitions. [2022-12-14 08:35:27,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 08:35:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 4949 transitions. [2022-12-14 08:35:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 08:35:27,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:35:27,327 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] [2022-12-14 08:35:27,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 08:35:27,327 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:35:27,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:35:27,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1545388754, now seen corresponding path program 1 times [2022-12-14 08:35:27,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:35:27,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116165015] [2022-12-14 08:35:27,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:27,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:35:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 08:35:27,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:35:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116165015] [2022-12-14 08:35:27,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116165015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:35:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387385093] [2022-12-14 08:35:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:27,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:35:27,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:35:27,395 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:35:27,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 08:35:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:27,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:35:27,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:35:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:35:27,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:35:27,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387385093] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:35:27,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:35:27,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-12-14 08:35:27,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236036388] [2022-12-14 08:35:27,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:35:27,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:35:27,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:35:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:35:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:35:27,498 INFO L87 Difference]: Start difference. First operand 4140 states and 4949 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) [2022-12-14 08:35:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:35:28,097 INFO L93 Difference]: Finished difference Result 4889 states and 5794 transitions. [2022-12-14 08:35:28,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:35:28,098 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 [2022-12-14 08:35:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:35:28,103 INFO L225 Difference]: With dead ends: 4889 [2022-12-14 08:35:28,103 INFO L226 Difference]: Without dead ends: 4432 [2022-12-14 08:35:28,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 08:35:28,105 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 156 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:35:28,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 863 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:35:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4432 states. [2022-12-14 08:35:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4432 to 4398. [2022-12-14 08:35:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4398 states, 3337 states have (on average 1.1810008990110878) internal successors, (3941), 3363 states have internal predecessors, (3941), 580 states have call successors, (580), 478 states have call predecessors, (580), 479 states have return successors, (716), 558 states have call predecessors, (716), 577 states have call successors, (716) [2022-12-14 08:35:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4398 states to 4398 states and 5237 transitions. [2022-12-14 08:35:28,609 INFO L78 Accepts]: Start accepts. Automaton has 4398 states and 5237 transitions. Word has length 113 [2022-12-14 08:35:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:35:28,609 INFO L495 AbstractCegarLoop]: Abstraction has 4398 states and 5237 transitions. [2022-12-14 08:35:28,609 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) [2022-12-14 08:35:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4398 states and 5237 transitions. [2022-12-14 08:35:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 08:35:28,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:35:28,611 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:35:28,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 08:35:28,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:35:28,813 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:35:28,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:35:28,814 INFO L85 PathProgramCache]: Analyzing trace with hash 634801197, now seen corresponding path program 1 times [2022-12-14 08:35:28,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:35:28,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049151284] [2022-12-14 08:35:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:28,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:35:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:35:28,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:35:28,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049151284] [2022-12-14 08:35:28,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049151284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:35:28,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445240612] [2022-12-14 08:35:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:28,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:35:28,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:35:28,944 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:35:28,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 08:35:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:29,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:35:29,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:35:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:35:29,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:35:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 08:35:29,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445240612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:35:29,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495258188] [2022-12-14 08:35:29,230 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-12-14 08:35:29,230 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:35:29,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:35:29,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:35:29,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:35:36,729 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 72 for LOIs [2022-12-14 08:35:36,733 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 174 for LOIs [2022-12-14 08:35:37,583 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 147 for LOIs [2022-12-14 08:35:37,627 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 120 for LOIs [2022-12-14 08:35:37,645 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 128 for LOIs [2022-12-14 08:35:37,863 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 67 for LOIs [2022-12-14 08:35:38,176 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 120 for LOIs [2022-12-14 08:35:38,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:35:53,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '289430#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-12-14 08:35:53,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:35:53,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:35:53,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2022-12-14 08:35:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404255398] [2022-12-14 08:35:53,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:35:53,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:35:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:35:53,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:35:53,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=3910, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 08:35:53,380 INFO L87 Difference]: Start difference. First operand 4398 states and 5237 transitions. Second operand has 17 states, 14 states have (on average 8.357142857142858) internal successors, (117), 15 states have internal predecessors, (117), 7 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 08:35:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:35:56,664 INFO L93 Difference]: Finished difference Result 8015 states and 9650 transitions. [2022-12-14 08:35:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-12-14 08:35:56,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 8.357142857142858) internal successors, (117), 15 states have internal predecessors, (117), 7 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 113 [2022-12-14 08:35:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:35:56,670 INFO L225 Difference]: With dead ends: 8015 [2022-12-14 08:35:56,670 INFO L226 Difference]: Without dead ends: 4420 [2022-12-14 08:35:56,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 328 SyntacticMatches, 15 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15225 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=2177, Invalid=31495, Unknown=0, NotChecked=0, Total=33672 [2022-12-14 08:35:56,698 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 1472 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 3169 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 08:35:56,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 3169 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 08:35:56,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2022-12-14 08:35:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 3683. [2022-12-14 08:35:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 2793 states have (on average 1.158968850698174) internal successors, (3237), 2829 states have internal predecessors, (3237), 467 states have call successors, (467), 410 states have call predecessors, (467), 421 states have return successors, (544), 445 states have call predecessors, (544), 464 states have call successors, (544) [2022-12-14 08:35:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 4248 transitions. [2022-12-14 08:35:57,126 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 4248 transitions. Word has length 113 [2022-12-14 08:35:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:35:57,127 INFO L495 AbstractCegarLoop]: Abstraction has 3683 states and 4248 transitions. [2022-12-14 08:35:57,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 8.357142857142858) internal successors, (117), 15 states have internal predecessors, (117), 7 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 08:35:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 4248 transitions. [2022-12-14 08:35:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 08:35:57,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:35:57,128 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:35:57,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 08:35:57,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:35:57,329 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:35:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:35:57,330 INFO L85 PathProgramCache]: Analyzing trace with hash -492477775, now seen corresponding path program 1 times [2022-12-14 08:35:57,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:35:57,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342480977] [2022-12-14 08:35:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:57,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:35:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:35:57,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:35:57,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342480977] [2022-12-14 08:35:57,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342480977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:35:57,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323913495] [2022-12-14 08:35:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:35:57,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:35:57,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:35:57,582 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:35:57,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 08:35:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:35:57,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 08:35:57,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:35:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:35:57,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:35:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 08:35:57,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323913495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:35:57,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740576505] [2022-12-14 08:35:57,944 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-12-14 08:35:57,944 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:35:57,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:35:57,944 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:35:57,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:36:06,462 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 174 for LOIs [2022-12-14 08:36:19,865 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 67 for LOIs [2022-12-14 08:36:19,872 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 139 for LOIs [2022-12-14 08:36:19,894 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2022-12-14 08:36:19,968 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 126 for LOIs [2022-12-14 08:36:20,315 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 120 for LOIs [2022-12-14 08:36:20,344 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:36:30,971 WARN L233 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 556 DAG size of output: 380 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:36:41,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [740576505] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:36:41,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:36:41,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [13, 8, 6] total 66 [2022-12-14 08:36:41,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007201587] [2022-12-14 08:36:41,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:36:41,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 08:36:41,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:36:41,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 08:36:41,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=3889, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 08:36:41,326 INFO L87 Difference]: Start difference. First operand 3683 states and 4248 transitions. Second operand has 47 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 08:37:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:14,961 INFO L93 Difference]: Finished difference Result 6332 states and 7348 transitions. [2022-12-14 08:37:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-14 08:37:14,962 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 113 [2022-12-14 08:37:14,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:14,967 INFO L225 Difference]: With dead ends: 6332 [2022-12-14 08:37:14,968 INFO L226 Difference]: Without dead ends: 3731 [2022-12-14 08:37:14,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 275 SyntacticMatches, 17 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7724 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=1769, Invalid=18253, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 08:37:14,974 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 527 mSDsluCounter, 3044 mSDsCounter, 0 mSdLazyCounter, 5876 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 6134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 5876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:14,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 3273 Invalid, 6134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 5876 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-14 08:37:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2022-12-14 08:37:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3671. [2022-12-14 08:37:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 2783 states have (on average 1.1577434423284225) internal successors, (3222), 2819 states have internal predecessors, (3222), 469 states have call successors, (469), 406 states have call predecessors, (469), 417 states have return successors, (542), 447 states have call predecessors, (542), 466 states have call successors, (542) [2022-12-14 08:37:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 4233 transitions. [2022-12-14 08:37:15,445 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 4233 transitions. Word has length 113 [2022-12-14 08:37:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:15,445 INFO L495 AbstractCegarLoop]: Abstraction has 3671 states and 4233 transitions. [2022-12-14 08:37:15,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 08:37:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 4233 transitions. [2022-12-14 08:37:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 08:37:15,447 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:15,447 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] [2022-12-14 08:37:15,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 08:37:15,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:15,648 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:15,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1511316369, now seen corresponding path program 1 times [2022-12-14 08:37:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:15,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101446281] [2022-12-14 08:37:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:15,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:37:15,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:15,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101446281] [2022-12-14 08:37:15,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101446281] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:37:15,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:37:15,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 08:37:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374917537] [2022-12-14 08:37:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:37:15,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 08:37:15,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 08:37:15,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:37:15,799 INFO L87 Difference]: Start difference. First operand 3671 states and 4233 transitions. Second operand has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-12-14 08:37:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:37:16,760 INFO L93 Difference]: Finished difference Result 4350 states and 4996 transitions. [2022-12-14 08:37:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 08:37:16,761 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 114 [2022-12-14 08:37:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:37:16,766 INFO L225 Difference]: With dead ends: 4350 [2022-12-14 08:37:16,766 INFO L226 Difference]: Without dead ends: 3635 [2022-12-14 08:37:16,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:37:16,767 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 388 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:37:16,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 670 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:37:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2022-12-14 08:37:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 3615. [2022-12-14 08:37:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 2747 states have (on average 1.1568984346559883) internal successors, (3178), 2787 states have internal predecessors, (3178), 454 states have call successors, (454), 394 states have call predecessors, (454), 412 states have return successors, (533), 435 states have call predecessors, (533), 451 states have call successors, (533) [2022-12-14 08:37:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 4165 transitions. [2022-12-14 08:37:17,260 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 4165 transitions. Word has length 114 [2022-12-14 08:37:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:37:17,260 INFO L495 AbstractCegarLoop]: Abstraction has 3615 states and 4165 transitions. [2022-12-14 08:37:17,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-12-14 08:37:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 4165 transitions. [2022-12-14 08:37:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 08:37:17,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:37:17,262 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] [2022-12-14 08:37:17,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 08:37:17,262 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:37:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:37:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1754336868, now seen corresponding path program 1 times [2022-12-14 08:37:17,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:37:17,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619623000] [2022-12-14 08:37:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:17,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:37:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 08:37:17,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:37:17,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619623000] [2022-12-14 08:37:17,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619623000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:37:17,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25127200] [2022-12-14 08:37:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:37:17,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:37:17,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:37:17,687 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:37:17,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 08:37:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:37:17,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 08:37:17,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:37:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:37:18,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:37:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:37:19,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25127200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:37:19,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294347604] [2022-12-14 08:37:19,752 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 08:37:19,752 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:37:19,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:37:19,752 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:37:19,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:37:34,616 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 184 for LOIs [2022-12-14 08:37:34,866 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 136 for LOIs [2022-12-14 08:37:34,887 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 73 for LOIs [2022-12-14 08:37:34,894 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 196 for LOIs [2022-12-14 08:37:35,658 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 124 for LOIs [2022-12-14 08:37:35,764 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 73 for LOIs [2022-12-14 08:37:35,858 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 188 for LOIs [2022-12-14 08:37:36,030 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 211 for LOIs [2022-12-14 08:37:36,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:37:53,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '333171#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~t2_i~0 0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~E_2~0 2) (= ~local~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (= ~E_1~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:37:53,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:37:53,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:37:53,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-12-14 08:37:53,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610719127] [2022-12-14 08:37:53,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:37:53,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 08:37:53,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:37:53,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 08:37:53,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=10388, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 08:37:53,948 INFO L87 Difference]: Start difference. First operand 3615 states and 4165 transitions. Second operand has 49 states, 32 states have (on average 6.125) internal successors, (196), 37 states have internal predecessors, (196), 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) [2022-12-14 08:38:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:08,177 INFO L93 Difference]: Finished difference Result 5347 states and 6138 transitions. [2022-12-14 08:38:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-12-14 08:38:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.125) internal successors, (196), 37 states have internal predecessors, (196), 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 [2022-12-14 08:38:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:08,183 INFO L225 Difference]: With dead ends: 5347 [2022-12-14 08:38:08,183 INFO L226 Difference]: Without dead ends: 4602 [2022-12-14 08:38:08,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38512 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=8526, Invalid=87264, Unknown=0, NotChecked=0, Total=95790 [2022-12-14 08:38:08,189 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 3371 mSDsluCounter, 2425 mSDsCounter, 0 mSdLazyCounter, 7005 mSolverCounterSat, 2139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3374 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 9144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2139 IncrementalHoareTripleChecker+Valid, 7005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:08,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3374 Valid, 2580 Invalid, 9144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2139 Valid, 7005 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 08:38:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-12-14 08:38:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 3767. [2022-12-14 08:38:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 2851 states have (on average 1.1560855840056121) internal successors, (3296), 2892 states have internal predecessors, (3296), 474 states have call successors, (474), 413 states have call predecessors, (474), 440 states have return successors, (563), 462 states have call predecessors, (563), 471 states have call successors, (563) [2022-12-14 08:38:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 4333 transitions. [2022-12-14 08:38:08,801 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 4333 transitions. Word has length 114 [2022-12-14 08:38:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:08,801 INFO L495 AbstractCegarLoop]: Abstraction has 3767 states and 4333 transitions. [2022-12-14 08:38:08,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.125) internal successors, (196), 37 states have internal predecessors, (196), 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) [2022-12-14 08:38:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 4333 transitions. [2022-12-14 08:38:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 08:38:08,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:08,803 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] [2022-12-14 08:38:08,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 08:38:09,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 08:38:09,004 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:09,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:09,005 INFO L85 PathProgramCache]: Analyzing trace with hash -839902097, now seen corresponding path program 1 times [2022-12-14 08:38:09,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:09,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139652932] [2022-12-14 08:38:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:09,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:38:09,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:09,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139652932] [2022-12-14 08:38:09,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139652932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:09,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43505122] [2022-12-14 08:38:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:09,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:09,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:09,199 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:09,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 08:38:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:09,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:38:09,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 08:38:09,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:38:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 08:38:09,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43505122] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:09,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:38:09,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-12-14 08:38:09,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111615129] [2022-12-14 08:38:09,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:09,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:38:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:38:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:38:09,467 INFO L87 Difference]: Start difference. First operand 3767 states and 4333 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) [2022-12-14 08:38:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:10,477 INFO L93 Difference]: Finished difference Result 5004 states and 5766 transitions. [2022-12-14 08:38:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:38:10,477 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 [2022-12-14 08:38:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:10,483 INFO L225 Difference]: With dead ends: 5004 [2022-12-14 08:38:10,483 INFO L226 Difference]: Without dead ends: 4173 [2022-12-14 08:38:10,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-14 08:38:10,484 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 243 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:10,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 492 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:38:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-12-14 08:38:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 3917. [2022-12-14 08:38:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 2941 states have (on average 1.1550493029581774) internal successors, (3397), 2988 states have internal predecessors, (3397), 503 states have call successors, (503), 432 states have call predecessors, (503), 471 states have return successors, (622), 497 states have call predecessors, (622), 500 states have call successors, (622) [2022-12-14 08:38:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 4522 transitions. [2022-12-14 08:38:11,289 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 4522 transitions. Word has length 115 [2022-12-14 08:38:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:11,290 INFO L495 AbstractCegarLoop]: Abstraction has 3917 states and 4522 transitions. [2022-12-14 08:38:11,290 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) [2022-12-14 08:38:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 4522 transitions. [2022-12-14 08:38:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 08:38:11,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:11,293 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:11,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 08:38:11,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 08:38:11,495 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1461240790, now seen corresponding path program 1 times [2022-12-14 08:38:11,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:11,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730849442] [2022-12-14 08:38:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:11,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:38:11,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730849442] [2022-12-14 08:38:11,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730849442] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:11,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459373247] [2022-12-14 08:38:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:11,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:11,873 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:11,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 08:38:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 08:38:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 08:38:12,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:38:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:38:12,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459373247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:38:12,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287506127] [2022-12-14 08:38:12,593 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-12-14 08:38:12,593 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:38:12,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:38:12,593 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:38:12,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:38:24,195 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 73 for LOIs [2022-12-14 08:38:24,201 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 120 for LOIs [2022-12-14 08:38:24,250 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 68 for LOIs [2022-12-14 08:38:24,262 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 139 for LOIs [2022-12-14 08:38:24,287 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 77 for LOIs [2022-12-14 08:38:24,356 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 120 for LOIs [2022-12-14 08:38:24,720 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 120 for LOIs [2022-12-14 08:38:24,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:38:39,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '360581#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-12-14 08:38:39,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:38:39,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:38:39,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 32 [2022-12-14 08:38:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235046283] [2022-12-14 08:38:39,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:38:39,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 08:38:39,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:39,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 08:38:39,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=6399, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 08:38:39,315 INFO L87 Difference]: Start difference. First operand 3917 states and 4522 transitions. Second operand has 32 states, 20 states have (on average 8.1) internal successors, (162), 25 states have internal predecessors, (162), 13 states have call successors, (40), 9 states have call predecessors, (40), 17 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2022-12-14 08:38:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:45,130 INFO L93 Difference]: Finished difference Result 8599 states and 10196 transitions. [2022-12-14 08:38:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 08:38:45,130 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 20 states have (on average 8.1) internal successors, (162), 25 states have internal predecessors, (162), 13 states have call successors, (40), 9 states have call predecessors, (40), 17 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) Word has length 116 [2022-12-14 08:38:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:45,140 INFO L225 Difference]: With dead ends: 8599 [2022-12-14 08:38:45,140 INFO L226 Difference]: Without dead ends: 6694 [2022-12-14 08:38:45,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 285 SyntacticMatches, 20 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10978 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=2736, Invalid=22386, Unknown=0, NotChecked=0, Total=25122 [2022-12-14 08:38:45,144 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 2869 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 3427 mSolverCounterSat, 1793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2878 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 5220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1793 IncrementalHoareTripleChecker+Valid, 3427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:45,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2878 Valid, 1381 Invalid, 5220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1793 Valid, 3427 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 08:38:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2022-12-14 08:38:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 3760. [2022-12-14 08:38:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3760 states, 2812 states have (on average 1.1486486486486487) internal successors, (3230), 2858 states have internal predecessors, (3230), 491 states have call successors, (491), 422 states have call predecessors, (491), 455 states have return successors, (594), 480 states have call predecessors, (594), 488 states have call successors, (594) [2022-12-14 08:38:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 4315 transitions. [2022-12-14 08:38:45,874 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 4315 transitions. Word has length 116 [2022-12-14 08:38:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:45,874 INFO L495 AbstractCegarLoop]: Abstraction has 3760 states and 4315 transitions. [2022-12-14 08:38:45,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 20 states have (on average 8.1) internal successors, (162), 25 states have internal predecessors, (162), 13 states have call successors, (40), 9 states have call predecessors, (40), 17 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2022-12-14 08:38:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 4315 transitions. [2022-12-14 08:38:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 08:38:45,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:45,876 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] [2022-12-14 08:38:45,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 08:38:46,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 08:38:46,077 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:46,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1302882949, now seen corresponding path program 1 times [2022-12-14 08:38:46,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:46,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137696572] [2022-12-14 08:38:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:46,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 08:38:46,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:46,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137696572] [2022-12-14 08:38:46,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137696572] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:46,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459873967] [2022-12-14 08:38:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:46,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:46,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:46,428 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:46,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 08:38:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:46,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 08:38:46,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:38:47,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:38:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 08:38:48,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459873967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:38:48,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1677736665] [2022-12-14 08:38:48,257 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 08:38:48,257 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:38:48,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:38:48,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:38:48,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:38:53,475 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 172 for LOIs [2022-12-14 08:38:53,735 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 121 for LOIs [2022-12-14 08:38:53,753 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 60 for LOIs [2022-12-14 08:38:53,758 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 184 for LOIs [2022-12-14 08:38:54,731 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 112 for LOIs [2022-12-14 08:38:54,824 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 60 for LOIs [2022-12-14 08:38:54,899 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 176 for LOIs [2022-12-14 08:38:55,124 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 199 for LOIs [2022-12-14 08:38:55,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:39:11,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '378911#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~c_dr_pc~0 1) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:39:11,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:39:11,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:39:11,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-12-14 08:39:11,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187224853] [2022-12-14 08:39:11,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:39:11,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 08:39:11,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:11,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 08:39:11,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=10434, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 08:39:11,042 INFO L87 Difference]: Start difference. First operand 3760 states and 4315 transitions. Second operand has 49 states, 33 states have (on average 6.454545454545454) internal successors, (213), 38 states have internal predecessors, (213), 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) [2022-12-14 08:39:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:19,740 INFO L93 Difference]: Finished difference Result 6541 states and 7577 transitions. [2022-12-14 08:39:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-12-14 08:39:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.454545454545454) internal successors, (213), 38 states have internal predecessors, (213), 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 [2022-12-14 08:39:19,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:19,749 INFO L225 Difference]: With dead ends: 6541 [2022-12-14 08:39:19,749 INFO L226 Difference]: Without dead ends: 5560 [2022-12-14 08:39:19,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18608 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=4978, Invalid=41462, Unknown=0, NotChecked=0, Total=46440 [2022-12-14 08:39:19,755 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 3911 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 5559 mSolverCounterSat, 3083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3912 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 8642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3083 IncrementalHoareTripleChecker+Valid, 5559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:39:19,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3912 Valid, 1903 Invalid, 8642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3083 Valid, 5559 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 08:39:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2022-12-14 08:39:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 4191. [2022-12-14 08:39:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 3129 states have (on average 1.1514860977948227) internal successors, (3603), 3167 states have internal predecessors, (3603), 556 states have call successors, (556), 473 states have call predecessors, (556), 504 states have return successors, (651), 551 states have call predecessors, (651), 553 states have call successors, (651) [2022-12-14 08:39:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4810 transitions. [2022-12-14 08:39:20,622 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4810 transitions. Word has length 124 [2022-12-14 08:39:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:20,623 INFO L495 AbstractCegarLoop]: Abstraction has 4191 states and 4810 transitions. [2022-12-14 08:39:20,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.454545454545454) internal successors, (213), 38 states have internal predecessors, (213), 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) [2022-12-14 08:39:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4810 transitions. [2022-12-14 08:39:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 08:39:20,624 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:20,624 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] [2022-12-14 08:39:20,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 08:39:20,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 08:39:20,825 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:20,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:20,826 INFO L85 PathProgramCache]: Analyzing trace with hash 92345736, now seen corresponding path program 1 times [2022-12-14 08:39:20,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:20,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833782248] [2022-12-14 08:39:20,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 08:39:20,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:20,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833782248] [2022-12-14 08:39:20,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833782248] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:20,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330590411] [2022-12-14 08:39:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:20,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:39:20,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:39:20,955 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:39:20,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 08:39:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:39:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:39:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 08:39:21,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:39:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 08:39:21,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330590411] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:39:21,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:39:21,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-12-14 08:39:21,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304638726] [2022-12-14 08:39:21,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:21,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:39:21,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:39:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:39:21,209 INFO L87 Difference]: Start difference. First operand 4191 states and 4810 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) [2022-12-14 08:39:22,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:22,306 INFO L93 Difference]: Finished difference Result 4945 states and 5663 transitions. [2022-12-14 08:39:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:39:22,306 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 [2022-12-14 08:39:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:22,311 INFO L225 Difference]: With dead ends: 4945 [2022-12-14 08:39:22,311 INFO L226 Difference]: Without dead ends: 3533 [2022-12-14 08:39:22,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:39:22,313 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 378 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:39:22,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 441 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:39:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2022-12-14 08:39:23,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 3456. [2022-12-14 08:39:23,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3456 states, 2607 states have (on average 1.143843498273878) internal successors, (2982), 2640 states have internal predecessors, (2982), 449 states have call successors, (449), 385 states have call predecessors, (449), 398 states have return successors, (516), 431 states have call predecessors, (516), 446 states have call successors, (516) [2022-12-14 08:39:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3456 states to 3456 states and 3947 transitions. [2022-12-14 08:39:23,057 INFO L78 Accepts]: Start accepts. Automaton has 3456 states and 3947 transitions. Word has length 125 [2022-12-14 08:39:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:23,057 INFO L495 AbstractCegarLoop]: Abstraction has 3456 states and 3947 transitions. [2022-12-14 08:39:23,057 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) [2022-12-14 08:39:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3456 states and 3947 transitions. [2022-12-14 08:39:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 08:39:23,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:23,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:39:23,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 08:39:23,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 08:39:23,259 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1081011849, now seen corresponding path program 1 times [2022-12-14 08:39:23,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:23,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147723294] [2022-12-14 08:39:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:23,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:39:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 08:39:23,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:39:23,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147723294] [2022-12-14 08:39:23,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147723294] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:39:23,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:39:23,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:39:23,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733129232] [2022-12-14 08:39:23,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:39:23,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:39:23,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:39:23,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:39:23,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:39:23,396 INFO L87 Difference]: Start difference. First operand 3456 states and 3947 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:39:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:39:25,050 INFO L93 Difference]: Finished difference Result 8028 states and 9264 transitions. [2022-12-14 08:39:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:39:25,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 128 [2022-12-14 08:39:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:39:25,057 INFO L225 Difference]: With dead ends: 8028 [2022-12-14 08:39:25,057 INFO L226 Difference]: Without dead ends: 6416 [2022-12-14 08:39:25,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:39:25,059 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 322 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:39:25,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 739 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:39:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6416 states. [2022-12-14 08:39:26,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6416 to 4902. [2022-12-14 08:39:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 3705 states have (on average 1.149527665317139) internal successors, (4259), 3744 states have internal predecessors, (4259), 637 states have call successors, (637), 542 states have call predecessors, (637), 558 states have return successors, (728), 616 states have call predecessors, (728), 634 states have call successors, (728) [2022-12-14 08:39:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 5624 transitions. [2022-12-14 08:39:26,144 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 5624 transitions. Word has length 128 [2022-12-14 08:39:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:39:26,144 INFO L495 AbstractCegarLoop]: Abstraction has 4902 states and 5624 transitions. [2022-12-14 08:39:26,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:39:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 5624 transitions. [2022-12-14 08:39:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 08:39:26,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:39:26,146 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 08:39:26,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-14 08:39:26,146 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:39:26,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:39:26,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2090456224, now seen corresponding path program 1 times [2022-12-14 08:39:26,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:39:26,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767745553] [2022-12-14 08:39:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:39:26,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:39:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:39:26,158 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 08:39:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:39:26,213 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 08:39:26,213 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 08:39:26,214 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-12-14 08:39:26,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-14 08:39:26,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-14 08:39:26,218 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:39:26,221 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 08:39:26,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 08:39:26 BoogieIcfgContainer [2022-12-14 08:39:26,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 08:39:26,296 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 08:39:26,296 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 08:39:26,296 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 08:39:26,296 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:33:53" (3/4) ... [2022-12-14 08:39:26,298 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 08:39:26,366 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 08:39:26,366 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 08:39:26,367 INFO L158 Benchmark]: Toolchain (without parser) took 333578.91ms. Allocated memory was 125.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 91.9MB in the beginning and 526.8MB in the end (delta: -434.8MB). Peak memory consumption was 684.2MB. Max. memory is 16.1GB. [2022-12-14 08:39:26,367 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 104.9MB. Free memory was 77.1MB in the beginning and 76.9MB in the end (delta: 153.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:39:26,367 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.38ms. Allocated memory is still 125.8MB. Free memory was 91.5MB in the beginning and 73.9MB in the end (delta: 17.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 08:39:26,367 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.93ms. Allocated memory is still 125.8MB. Free memory was 73.9MB in the beginning and 71.0MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:39:26,367 INFO L158 Benchmark]: Boogie Preprocessor took 36.23ms. Allocated memory is still 125.8MB. Free memory was 71.0MB in the beginning and 68.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:39:26,367 INFO L158 Benchmark]: RCFGBuilder took 636.89ms. Allocated memory is still 125.8MB. Free memory was 68.5MB in the beginning and 62.2MB in the end (delta: 6.2MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. [2022-12-14 08:39:26,367 INFO L158 Benchmark]: TraceAbstraction took 332478.62ms. Allocated memory was 125.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 61.5MB in the beginning and 543.5MB in the end (delta: -482.0MB). Peak memory consumption was 634.4MB. Max. memory is 16.1GB. [2022-12-14 08:39:26,368 INFO L158 Benchmark]: Witness Printer took 70.61ms. Allocated memory is still 1.2GB. Free memory was 543.5MB in the beginning and 526.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 08:39:26,368 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 104.9MB. Free memory was 77.1MB in the beginning and 76.9MB in the end (delta: 153.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 308.38ms. Allocated memory is still 125.8MB. Free memory was 91.5MB in the beginning and 73.9MB in the end (delta: 17.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.93ms. Allocated memory is still 125.8MB. Free memory was 73.9MB in the beginning and 71.0MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.23ms. Allocated memory is still 125.8MB. Free memory was 71.0MB in the beginning and 68.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 636.89ms. Allocated memory is still 125.8MB. Free memory was 68.5MB in the beginning and 62.2MB in the end (delta: 6.2MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. * TraceAbstraction took 332478.62ms. Allocated memory was 125.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 61.5MB in the beginning and 543.5MB in the end (delta: -482.0MB). Peak memory consumption was 634.4MB. Max. memory is 16.1GB. * Witness Printer took 70.61ms. Allocated memory is still 1.2GB. Free memory was 543.5MB in the beginning and 526.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 496]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L33] int q_buf_0 ; [L34] int q_free ; [L35] int q_read_ev ; [L36] int q_write_ev ; [L37] int q_req_up ; [L38] int q_ev ; [L59] int p_num_write ; [L60] int p_last_write ; [L61] int p_dw_st ; [L62] int p_dw_pc ; [L63] int p_dw_i ; [L64] int c_num_read ; [L65] int c_last_read ; [L66] int c_dr_st ; [L67] int c_dr_pc ; [L68] int c_dr_i ; [L172] static int a_t ; [L500] int m_pc = 0; [L501] int t1_pc = 0; [L502] int t2_pc = 0; [L503] int m_st ; [L504] int t1_st ; [L505] int t2_st ; [L506] int m_i ; [L507] int t1_i ; [L508] int t2_i ; [L509] int M_E = 2; [L510] int T1_E = 2; [L511] int T2_E = 2; [L512] int E_M = 2; [L513] int E_1 = 2; [L514] int E_2 = 2; [L519] int token ; [L521] int local ; [L1099] COND FALSE !(__VERIFIER_nondet_int()) [L1102] CALL main2() [L1086] int __retres1 ; [L1090] CALL init_model2() [L1000] m_i = 1 [L1001] t1_i = 1 [L1002] t2_i = 1 [L1090] RET init_model2() [L1091] CALL start_simulation2() [L1027] int kernel_st ; [L1028] int tmp ; [L1029] int tmp___0 ; [L1033] kernel_st = 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1034] FCALL update_channels2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1035] CALL init_threads2() [L719] COND TRUE m_i == 1 [L720] m_st = 0 [L724] COND TRUE t1_i == 1 [L725] t1_st = 0 [L729] COND TRUE t2_i == 1 [L730] t2_st = 0 [L1035] RET init_threads2() [L1036] CALL fire_delta_events2() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L832] COND FALSE !(M_E == 0) [L837] COND FALSE !(T1_E == 0) [L842] COND FALSE !(T2_E == 0) [L847] COND FALSE !(E_M == 0) [L852] COND FALSE !(E_1 == 0) [L857] COND FALSE !(E_2 == 0) [L1036] RET fire_delta_events2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1037] CALL activate_threads2() VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L905] int tmp ; [L906] int tmp___0 ; [L907] int tmp___1 ; [L911] CALL, EXPR is_master_triggered() [L651] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L654] COND FALSE !(m_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L664] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L666] return (__retres1); [L911] RET, EXPR is_master_triggered() [L911] tmp = is_master_triggered() [L913] COND FALSE !(\read(tmp)) [L919] CALL, EXPR is_transmit1_triggered() [L670] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L673] COND FALSE !(t1_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L683] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L685] return (__retres1); [L919] RET, EXPR is_transmit1_triggered() [L919] tmp___0 = is_transmit1_triggered() [L921] COND FALSE !(\read(tmp___0)) [L927] CALL, EXPR is_transmit2_triggered() [L689] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L692] COND FALSE !(t2_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L702] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L704] return (__retres1); [L927] RET, EXPR is_transmit2_triggered() [L927] tmp___1 = is_transmit2_triggered() [L929] COND FALSE !(\read(tmp___1)) [L1037] RET activate_threads2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1038] CALL reset_delta_events2() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L870] COND FALSE !(M_E == 1) [L875] COND FALSE !(T1_E == 1) [L880] COND FALSE !(T2_E == 1) [L885] COND FALSE !(E_M == 1) [L890] COND FALSE !(E_1 == 1) [L895] COND FALSE !(E_2 == 1) [L1038] RET reset_delta_events2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L1041] COND TRUE 1 [L1044] kernel_st = 1 [L1045] CALL eval2() [L765] int tmp ; VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L769] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L772] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L739] int __retres1 ; [L742] COND TRUE m_st == 0 [L743] __retres1 = 1 [L760] return (__retres1); [L772] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L772] tmp = exists_runnable_thread2() [L774] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, tmp=1, token=0] [L779] COND TRUE m_st == 0 [L780] int tmp_ndt_1; [L781] tmp_ndt_1 = __VERIFIER_nondet_int() [L782] COND FALSE !(\read(tmp_ndt_1)) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, tmp=1, tmp_ndt_1=0, token=0] [L793] COND TRUE t1_st == 0 [L794] int tmp_ndt_2; [L795] tmp_ndt_2 = __VERIFIER_nondet_int() [L796] COND TRUE \read(tmp_ndt_2) [L798] t1_st = 1 [L799] CALL transmit1() [L582] COND TRUE t1_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L593] COND TRUE 1 [L595] t1_pc = 1 [L596] t1_st = 2 [L799] RET transmit1() [L807] COND TRUE t2_st == 0 [L808] int tmp_ndt_3; [L809] tmp_ndt_3 = __VERIFIER_nondet_int() [L810] COND TRUE \read(tmp_ndt_3) [L812] t2_st = 1 [L813] CALL transmit2() [L618] COND TRUE t2_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, token=0] [L629] COND TRUE 1 [L631] t2_pc = 1 [L632] t2_st = 2 [L813] RET transmit2() [L769] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1, token=0] [L772] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L739] int __retres1 ; [L742] COND TRUE m_st == 0 [L743] __retres1 = 1 [L760] return (__retres1); [L772] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1, token=0] [L772] tmp = exists_runnable_thread2() [L774] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=1, token=0] [L779] COND TRUE m_st == 0 [L780] int tmp_ndt_1; [L781] tmp_ndt_1 = __VERIFIER_nondet_int() [L782] COND TRUE \read(tmp_ndt_1) [L784] m_st = 1 [L785] CALL master() [L524] int tmp_var = __VERIFIER_nondet_int(); [L526] COND TRUE m_pc == 0 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L537] COND TRUE 1 [L540] token = __VERIFIER_nondet_int() [L541] local = token [L542] E_1 = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L543] CALL immediate_notify() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L943] CALL activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L905] int tmp ; [L906] int tmp___0 ; [L907] int tmp___1 ; [L911] CALL, EXPR is_master_triggered() [L651] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L654] COND FALSE !(m_pc == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L664] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L666] return (__retres1); [L911] RET, EXPR is_master_triggered() [L911] tmp = is_master_triggered() [L913] COND FALSE !(\read(tmp)) [L919] CALL, EXPR is_transmit1_triggered() [L670] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L673] COND TRUE t1_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L674] COND TRUE E_1 == 1 [L675] __retres1 = 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L685] return (__retres1); [L919] RET, EXPR is_transmit1_triggered() [L919] tmp___0 = is_transmit1_triggered() [L921] COND TRUE \read(tmp___0) [L922] t1_st = 0 [L927] CALL, EXPR is_transmit2_triggered() [L689] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L692] COND TRUE t2_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L693] COND FALSE !(E_2 == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L702] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L704] return (__retres1); [L927] RET, EXPR is_transmit2_triggered() [L927] tmp___1 = is_transmit2_triggered() [L929] COND FALSE !(\read(tmp___1)) [L943] RET activate_threads2() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L543] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L544] E_1 = 2 [L545] m_pc = 1 [L546] m_st = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=0, token=0] [L785] RET master() [L793] COND TRUE t1_st == 0 [L794] int tmp_ndt_2; [L795] tmp_ndt_2 = __VERIFIER_nondet_int() [L796] COND TRUE \read(tmp_ndt_2) [L798] t1_st = 1 [L799] CALL transmit1() [L582] COND FALSE !(t1_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L585] COND TRUE t1_pc == 1 [L601] token += 1 [L602] E_2 = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L603] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L943] CALL activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L905] int tmp ; [L906] int tmp___0 ; [L907] int tmp___1 ; [L911] CALL, EXPR is_master_triggered() [L651] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L654] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L655] COND FALSE !(E_M == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L664] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L666] return (__retres1); [L911] RET, EXPR is_master_triggered() [L911] tmp = is_master_triggered() [L913] COND FALSE !(\read(tmp)) [L919] CALL, EXPR is_transmit1_triggered() [L670] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L673] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L674] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L683] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L685] return (__retres1); [L919] RET, EXPR is_transmit1_triggered() [L919] tmp___0 = is_transmit1_triggered() [L921] COND FALSE !(\read(tmp___0)) [L927] CALL, EXPR is_transmit2_triggered() [L689] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L692] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L693] COND TRUE E_2 == 1 [L694] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L704] return (__retres1); [L927] RET, EXPR is_transmit2_triggered() [L927] tmp___1 = is_transmit2_triggered() [L929] COND TRUE \read(tmp___1) [L930] t2_st = 0 [L943] RET activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L603] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L604] E_2 = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L593] COND TRUE 1 [L595] t1_pc = 1 [L596] t1_st = 2 [L799] RET transmit1() [L807] COND TRUE t2_st == 0 [L808] int tmp_ndt_3; [L809] tmp_ndt_3 = __VERIFIER_nondet_int() [L810] COND TRUE \read(tmp_ndt_3) [L812] t2_st = 1 [L813] CALL transmit2() [L618] COND FALSE !(t2_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=1] [L621] COND TRUE t2_pc == 1 [L637] token += 1 [L638] E_M = 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L639] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L943] CALL activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L905] int tmp ; [L906] int tmp___0 ; [L907] int tmp___1 ; [L911] CALL, EXPR is_master_triggered() [L651] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L654] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L655] COND TRUE E_M == 1 [L656] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L666] return (__retres1); [L911] RET, EXPR is_master_triggered() [L911] tmp = is_master_triggered() [L913] COND TRUE \read(tmp) [L914] m_st = 0 [L919] CALL, EXPR is_transmit1_triggered() [L670] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L673] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L674] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L683] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L685] return (__retres1); [L919] RET, EXPR is_transmit1_triggered() [L919] tmp___0 = is_transmit1_triggered() [L921] COND FALSE !(\read(tmp___0)) [L927] CALL, EXPR is_transmit2_triggered() [L689] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L692] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L693] COND FALSE !(E_2 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L702] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, __retres1=0, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L704] return (__retres1); [L927] RET, EXPR is_transmit2_triggered() [L927] tmp___1 = is_transmit2_triggered() [L929] COND FALSE !(\read(tmp___1)) [L943] RET activate_threads2() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L639] RET immediate_notify() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L640] E_M = 2 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L629] COND TRUE 1 [L631] t2_pc = 1 [L632] t2_st = 2 [L813] RET transmit2() [L769] COND TRUE 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=1, tmp_ndt_3=1, token=2] [L772] CALL, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L739] int __retres1 ; [L742] COND TRUE m_st == 0 [L743] __retres1 = 1 [L760] return (__retres1); [L772] RET, EXPR exists_runnable_thread2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, exists_runnable_thread2()=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=1, tmp_ndt_3=1, token=2] [L772] tmp = exists_runnable_thread2() [L774] COND TRUE \read(tmp) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=1, tmp_ndt_3=1, token=2] [L779] COND TRUE m_st == 0 [L780] int tmp_ndt_1; [L781] tmp_ndt_1 = __VERIFIER_nondet_int() [L782] COND TRUE \read(tmp_ndt_1) [L784] m_st = 1 [L785] CALL master() [L524] int tmp_var = __VERIFIER_nondet_int(); [L526] COND FALSE !(m_pc == 0) VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L529] COND TRUE m_pc == 1 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L551] COND FALSE !(token != local + 2) [L556] COND TRUE tmp_var <= 5 [L557] COND TRUE tmp_var >= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L562] COND TRUE tmp_var <= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L563] COND TRUE tmp_var >= 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L564] COND TRUE tmp_var == 5 VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, tmp_var=5, token=2] [L565] CALL error2() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L496] reach_error() VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] - UnprovableResult [Line: 28]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 16 procedures, 156 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 332.4s, OverallIterations: 40, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 114.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20116 SdHoareTripleChecker+Valid, 26.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19928 mSDsluCounter, 31197 SdHoareTripleChecker+Invalid, 23.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 23237 mSDsCounter, 9781 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37556 IncrementalHoareTripleChecker+Invalid, 47337 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9781 mSolverCounterUnsat, 7960 mSDtfsCounter, 37556 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5283 GetRequests, 3791 SyntacticMatches, 71 SemanticMatches, 1421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98542 ImplicationChecksByTransitivity, 178.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5108occurred in iteration=25, InterpolantAutomatonStates: 909, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.9s AutomataMinimizationTime, 39 MinimizatonAttempts, 11901 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 6000 NumberOfCodeBlocks, 5961 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 6784 ConstructedInterpolants, 0 QuantifiedInterpolants, 17384 SizeOfPredicates, 71 NumberOfNonLiveVariables, 10595 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 70 InterpolantComputations, 32 PerfectInterpolantSequences, 3287/3754 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 33.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 14, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 211, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 308, TOOLS_POST_TIME: 21.4s, TOOLS_POST_CALL_APPLICATIONS: 166, TOOLS_POST_CALL_TIME: 5.7s, TOOLS_POST_RETURN_APPLICATIONS: 140, TOOLS_POST_RETURN_TIME: 2.6s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 608, TOOLS_QUANTIFIERELIM_TIME: 29.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 13.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 659, FLUID_YES_ANSWERS: 2, DOMAIN_JOIN_APPLICATIONS: 195, DOMAIN_JOIN_TIME: 3.1s, DOMAIN_ALPHA_APPLICATIONS: 2, DOMAIN_ALPHA_TIME: 0.2s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 8, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 211, DOMAIN_ISBOTTOM_TIME: 0.3s, LOOP_SUMMARIZER_APPLICATIONS: 8, LOOP_SUMMARIZER_CACHE_MISSES: 8, LOOP_SUMMARIZER_OVERALL_TIME: 6.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 6.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 8, CALL_SUMMARIZER_APPLICATIONS: 140, CALL_SUMMARIZER_CACHE_MISSES: 12, CALL_SUMMARIZER_OVERALL_TIME: 0.2s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.2s, DAG_COMPRESSION_PROCESSED_NODES: 15432, DAG_COMPRESSION_RETAINED_NODES: 569, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 08:39:26,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de6bd6ec-5180-442e-abbf-0535f1ff18d1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE