./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V --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 a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:16:47,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:16:47,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:16:47,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:16:47,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:16:47,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:16:47,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:16:47,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:16:47,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:16:47,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:16:47,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:16:47,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:16:47,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:16:47,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:16:47,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:16:47,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:16:47,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:16:47,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:16:47,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:16:47,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:16:47,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:16:47,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:16:47,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:16:47,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:16:47,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:16:47,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:16:47,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:16:47,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:16:47,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:16:47,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:16:47,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:16:47,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:16:47,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:16:47,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:16:47,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:16:47,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:16:47,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:16:47,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:16:47,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:16:47,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:16:47,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:16:47,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:16:47,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:16:47,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:16:47,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:16:47,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:16:47,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:16:47,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:16:47,751 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:16:47,751 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:16:47,751 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:16:47,751 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:16:47,752 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:16:47,753 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:16:47,753 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:16:47,753 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:16:47,754 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:16:47,754 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:16:47,754 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:16:47,754 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:16:47,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:16:47,755 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:16:47,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:16:47,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:16:47,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:16:47,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:16:47,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:16:47,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:16:47,758 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:16:47,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:16:47,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:16:47,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:16:47,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:16:47,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:16:47,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:16:47,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:16:47,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:16:47,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:16:47,761 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:16:47,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:16:47,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:16:47,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:16:47,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:16:47,763 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb [2021-11-23 02:16:48,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:16:48,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:16:48,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:16:48,074 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:16:48,074 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:16:48,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-11-23 02:16:48,147 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/data/369226a92/4639eb2d26eb4136a61d7fd929f9cfbd/FLAG83cd0baf5 [2021-11-23 02:16:48,665 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:16:48,666 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-11-23 02:16:48,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/data/369226a92/4639eb2d26eb4136a61d7fd929f9cfbd/FLAG83cd0baf5 [2021-11-23 02:16:49,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/data/369226a92/4639eb2d26eb4136a61d7fd929f9cfbd [2021-11-23 02:16:49,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:16:49,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:16:49,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:16:49,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:16:49,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:16:49,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b43f982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49, skipping insertion in model container [2021-11-23 02:16:49,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:16:49,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:16:49,272 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2021-11-23 02:16:49,338 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2021-11-23 02:16:49,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:16:49,426 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:16:49,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2021-11-23 02:16:49,455 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2021-11-23 02:16:49,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:16:49,508 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:16:49,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49 WrapperNode [2021-11-23 02:16:49,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:16:49,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:16:49,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:16:49,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:16:49,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,597 INFO L137 Inliner]: procedures = 52, calls = 55, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 480 [2021-11-23 02:16:49,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:16:49,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:16:49,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:16:49,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:16:49,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:16:49,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:16:49,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:16:49,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:16:49,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (1/1) ... [2021-11-23 02:16:49,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:16:49,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:49,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:16:49,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:16:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:16:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 02:16:49,736 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 02:16:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-11-23 02:16:49,736 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-11-23 02:16:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-23 02:16:49,737 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-23 02:16:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-23 02:16:49,737 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-23 02:16:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-23 02:16:49,737 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-23 02:16:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-23 02:16:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-23 02:16:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-23 02:16:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-23 02:16:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:16:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-23 02:16:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-23 02:16:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:16:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:16:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-23 02:16:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-23 02:16:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-11-23 02:16:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-11-23 02:16:49,894 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:16:49,896 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:16:50,495 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:16:50,743 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:16:50,743 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-23 02:16:50,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:16:50 BoogieIcfgContainer [2021-11-23 02:16:50,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:16:50,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:16:50,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:16:50,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:16:50,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:16:49" (1/3) ... [2021-11-23 02:16:50,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@520b535e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:16:50, skipping insertion in model container [2021-11-23 02:16:50,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:16:49" (2/3) ... [2021-11-23 02:16:50,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@520b535e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:16:50, skipping insertion in model container [2021-11-23 02:16:50,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:16:50" (3/3) ... [2021-11-23 02:16:50,757 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2021-11-23 02:16:50,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:16:50,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:16:50,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:16:50,846 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:16:50,847 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:16:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 98 states have (on average 1.5408163265306123) internal successors, (151), 105 states have internal predecessors, (151), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-23 02:16:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:16:50,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:50,876 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:16:50,877 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1083558583, now seen corresponding path program 1 times [2021-11-23 02:16:50,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:50,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98652639] [2021-11-23 02:16:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:50,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:51,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98652639] [2021-11-23 02:16:51,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98652639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:51,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:51,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:51,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617599687] [2021-11-23 02:16:51,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:51,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:51,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:51,119 INFO L87 Difference]: Start difference. First operand has 135 states, 98 states have (on average 1.5408163265306123) internal successors, (151), 105 states have internal predecessors, (151), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:16:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:51,280 INFO L93 Difference]: Finished difference Result 302 states and 446 transitions. [2021-11-23 02:16:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-23 02:16:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:51,295 INFO L225 Difference]: With dead ends: 302 [2021-11-23 02:16:51,295 INFO L226 Difference]: Without dead ends: 167 [2021-11-23 02:16:51,300 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:16:51,303 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 164 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:51,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 225 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-23 02:16:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2021-11-23 02:16:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 124 states have (on average 1.435483870967742) internal successors, (178), 128 states have internal predecessors, (178), 27 states have call successors, (27), 12 states have call predecessors, (27), 10 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-23 02:16:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 228 transitions. [2021-11-23 02:16:51,368 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 228 transitions. Word has length 28 [2021-11-23 02:16:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:51,369 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 228 transitions. [2021-11-23 02:16:51,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:16:51,370 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 228 transitions. [2021-11-23 02:16:51,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:16:51,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:51,373 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:16:51,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:16:51,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1565233326, now seen corresponding path program 1 times [2021-11-23 02:16:51,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:51,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368137522] [2021-11-23 02:16:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:51,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:51,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368137522] [2021-11-23 02:16:51,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368137522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:51,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:51,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:51,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87505392] [2021-11-23 02:16:51,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:51,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:51,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:51,456 INFO L87 Difference]: Start difference. First operand 163 states and 228 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:16:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:51,572 INFO L93 Difference]: Finished difference Result 319 states and 445 transitions. [2021-11-23 02:16:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:51,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-23 02:16:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:51,577 INFO L225 Difference]: With dead ends: 319 [2021-11-23 02:16:51,577 INFO L226 Difference]: Without dead ends: 238 [2021-11-23 02:16:51,579 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:16:51,580 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 162 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:51,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 210 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-23 02:16:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2021-11-23 02:16:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 184 states have (on average 1.4076086956521738) internal successors, (259), 188 states have internal predecessors, (259), 34 states have call successors, (34), 16 states have call predecessors, (34), 14 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-23 02:16:51,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 323 transitions. [2021-11-23 02:16:51,614 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 323 transitions. Word has length 29 [2021-11-23 02:16:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:51,614 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 323 transitions. [2021-11-23 02:16:51,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:16:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 323 transitions. [2021-11-23 02:16:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:16:51,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:51,618 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:16:51,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:16:51,618 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:51,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1243530325, now seen corresponding path program 1 times [2021-11-23 02:16:51,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:51,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038998168] [2021-11-23 02:16:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:51,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:51,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:51,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038998168] [2021-11-23 02:16:51,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038998168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:51,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:51,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:51,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131357226] [2021-11-23 02:16:51,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:51,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:51,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:51,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:51,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:51,720 INFO L87 Difference]: Start difference. First operand 234 states and 323 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:16:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:51,861 INFO L93 Difference]: Finished difference Result 474 states and 651 transitions. [2021-11-23 02:16:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:51,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-11-23 02:16:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:51,871 INFO L225 Difference]: With dead ends: 474 [2021-11-23 02:16:51,871 INFO L226 Difference]: Without dead ends: 322 [2021-11-23 02:16:51,876 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:16:51,881 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 46 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:51,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 305 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:51,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-23 02:16:51,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 308. [2021-11-23 02:16:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 247 states have (on average 1.3927125506072875) internal successors, (344), 253 states have internal predecessors, (344), 40 states have call successors, (40), 21 states have call predecessors, (40), 19 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-23 02:16:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 420 transitions. [2021-11-23 02:16:51,962 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 420 transitions. Word has length 30 [2021-11-23 02:16:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:51,962 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 420 transitions. [2021-11-23 02:16:51,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:16:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 420 transitions. [2021-11-23 02:16:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:16:51,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:51,971 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:16:51,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:16:51,973 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:51,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1659027409, now seen corresponding path program 1 times [2021-11-23 02:16:51,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:51,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325404252] [2021-11-23 02:16:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:51,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:52,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:52,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325404252] [2021-11-23 02:16:52,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325404252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:52,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:52,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:16:52,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189189067] [2021-11-23 02:16:52,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:52,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:16:52,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:52,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:16:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:16:52,065 INFO L87 Difference]: Start difference. First operand 308 states and 420 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-11-23 02:16:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:52,304 INFO L93 Difference]: Finished difference Result 448 states and 627 transitions. [2021-11-23 02:16:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:16:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 [2021-11-23 02:16:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:52,309 INFO L225 Difference]: With dead ends: 448 [2021-11-23 02:16:52,310 INFO L226 Difference]: Without dead ends: 372 [2021-11-23 02:16:52,312 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:16:52,322 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 248 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:52,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 366 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:16:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-23 02:16:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 371. [2021-11-23 02:16:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 292 states have (on average 1.3767123287671232) internal successors, (402), 299 states have internal predecessors, (402), 52 states have call successors, (52), 27 states have call predecessors, (52), 25 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-23 02:16:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 502 transitions. [2021-11-23 02:16:52,389 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 502 transitions. Word has length 38 [2021-11-23 02:16:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:52,390 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 502 transitions. [2021-11-23 02:16:52,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-11-23 02:16:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 502 transitions. [2021-11-23 02:16:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:16:52,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:52,397 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:16:52,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:16:52,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash -67207424, now seen corresponding path program 1 times [2021-11-23 02:16:52,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:52,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423261530] [2021-11-23 02:16:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:52,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:16:52,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:52,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423261530] [2021-11-23 02:16:52,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423261530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:52,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:52,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:52,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367548185] [2021-11-23 02:16:52,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:52,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:52,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:52,488 INFO L87 Difference]: Start difference. First operand 371 states and 502 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:16:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:52,563 INFO L93 Difference]: Finished difference Result 534 states and 720 transitions. [2021-11-23 02:16:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-23 02:16:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:52,566 INFO L225 Difference]: With dead ends: 534 [2021-11-23 02:16:52,567 INFO L226 Difference]: Without dead ends: 376 [2021-11-23 02:16:52,567 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:16:52,568 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 32 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:52,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 335 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:16:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-23 02:16:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 365. [2021-11-23 02:16:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 286 states have (on average 1.3566433566433567) internal successors, (388), 293 states have internal predecessors, (388), 52 states have call successors, (52), 27 states have call predecessors, (52), 25 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-23 02:16:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 488 transitions. [2021-11-23 02:16:52,616 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 488 transitions. Word has length 43 [2021-11-23 02:16:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:52,616 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 488 transitions. [2021-11-23 02:16:52,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:16:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 488 transitions. [2021-11-23 02:16:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:16:52,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:52,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:52,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:16:52,619 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:52,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1789590327, now seen corresponding path program 1 times [2021-11-23 02:16:52,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:52,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655795516] [2021-11-23 02:16:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:52,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:16:52,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:52,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655795516] [2021-11-23 02:16:52,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655795516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:52,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:52,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:52,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082391052] [2021-11-23 02:16:52,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:52,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:52,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:52,656 INFO L87 Difference]: Start difference. First operand 365 states and 488 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:16:52,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:52,735 INFO L93 Difference]: Finished difference Result 614 states and 812 transitions. [2021-11-23 02:16:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:52,735 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2021-11-23 02:16:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:52,739 INFO L225 Difference]: With dead ends: 614 [2021-11-23 02:16:52,739 INFO L226 Difference]: Without dead ends: 411 [2021-11-23 02:16:52,740 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:16:52,740 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 147 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:52,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 207 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-23 02:16:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2021-11-23 02:16:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 325 states have (on average 1.3261538461538462) internal successors, (431), 332 states have internal predecessors, (431), 56 states have call successors, (56), 30 states have call predecessors, (56), 28 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-23 02:16:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 539 transitions. [2021-11-23 02:16:52,770 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 539 transitions. Word has length 46 [2021-11-23 02:16:52,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:52,770 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 539 transitions. [2021-11-23 02:16:52,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:16:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 539 transitions. [2021-11-23 02:16:52,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:16:52,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:52,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:52,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:16:52,772 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:52,773 INFO L85 PathProgramCache]: Analyzing trace with hash -276777395, now seen corresponding path program 1 times [2021-11-23 02:16:52,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:52,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810125996] [2021-11-23 02:16:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:52,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:16:52,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:52,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810125996] [2021-11-23 02:16:52,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810125996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:52,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:52,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:16:52,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659188849] [2021-11-23 02:16:52,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:52,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:16:52,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:52,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:16:52,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:16:52,818 INFO L87 Difference]: Start difference. First operand 411 states and 539 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:16:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:52,975 INFO L93 Difference]: Finished difference Result 638 states and 839 transitions. [2021-11-23 02:16:52,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:16:52,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-11-23 02:16:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:52,979 INFO L225 Difference]: With dead ends: 638 [2021-11-23 02:16:52,979 INFO L226 Difference]: Without dead ends: 409 [2021-11-23 02:16:52,980 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:16:52,981 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 202 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:52,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 314 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:52,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-23 02:16:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 407. [2021-11-23 02:16:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 321 states have (on average 1.2928348909657321) internal successors, (415), 328 states have internal predecessors, (415), 56 states have call successors, (56), 30 states have call predecessors, (56), 28 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-23 02:16:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 523 transitions. [2021-11-23 02:16:53,011 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 523 transitions. Word has length 47 [2021-11-23 02:16:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:53,012 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 523 transitions. [2021-11-23 02:16:53,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:16:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 523 transitions. [2021-11-23 02:16:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:16:53,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:53,014 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:16:53,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:16:53,014 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:53,015 INFO L85 PathProgramCache]: Analyzing trace with hash 596061260, now seen corresponding path program 1 times [2021-11-23 02:16:53,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941743360] [2021-11-23 02:16:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:53,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:16:53,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:53,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941743360] [2021-11-23 02:16:53,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941743360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:53,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:53,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:16:53,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288288666] [2021-11-23 02:16:53,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:53,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:16:53,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:16:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:16:53,088 INFO L87 Difference]: Start difference. First operand 407 states and 523 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:16:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:53,257 INFO L93 Difference]: Finished difference Result 443 states and 564 transitions. [2021-11-23 02:16:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:16:53,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-11-23 02:16:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:53,262 INFO L225 Difference]: With dead ends: 443 [2021-11-23 02:16:53,263 INFO L226 Difference]: Without dead ends: 440 [2021-11-23 02:16:53,263 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:16:53,264 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 270 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:53,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 200 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-23 02:16:53,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 406. [2021-11-23 02:16:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 321 states have (on average 1.2866043613707165) internal successors, (413), 327 states have internal predecessors, (413), 55 states have call successors, (55), 30 states have call predecessors, (55), 28 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-23 02:16:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 520 transitions. [2021-11-23 02:16:53,307 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 520 transitions. Word has length 47 [2021-11-23 02:16:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:53,310 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 520 transitions. [2021-11-23 02:16:53,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:16:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 520 transitions. [2021-11-23 02:16:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:16:53,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:53,312 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:16:53,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:16:53,314 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1297342714, now seen corresponding path program 1 times [2021-11-23 02:16:53,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:53,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456641609] [2021-11-23 02:16:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:53,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:16:53,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:53,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456641609] [2021-11-23 02:16:53,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456641609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550005316] [2021-11-23 02:16:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:53,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:53,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:53,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:53,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:16:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:16:53,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:54,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:16:54,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550005316] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:54,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126854354] [2021-11-23 02:16:54,351 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2021-11-23 02:16:54,351 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:54,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:54,361 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:54,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:56,716 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 85 for LOIs [2021-11-23 02:16:56,728 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 100 for LOIs [2021-11-23 02:16:56,745 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 216 for LOIs [2021-11-23 02:16:57,905 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:09,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9820#(and (= ~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) (<= ~p_num_write~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~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) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:17:09,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:09,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:17:09,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2021-11-23 02:17:09,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327563472] [2021-11-23 02:17:09,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:09,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:17:09,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:17:09,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:17:09,684 INFO L87 Difference]: Start difference. First operand 406 states and 520 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 02:17:10,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:10,006 INFO L93 Difference]: Finished difference Result 807 states and 1018 transitions. [2021-11-23 02:17:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:17:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-11-23 02:17:10,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:10,013 INFO L225 Difference]: With dead ends: 807 [2021-11-23 02:17:10,013 INFO L226 Difference]: Without dead ends: 804 [2021-11-23 02:17:10,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:17:10,016 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 363 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:10,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 741 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:17:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-11-23 02:17:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 605. [2021-11-23 02:17:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 488 states have (on average 1.278688524590164) internal successors, (624), 496 states have internal predecessors, (624), 74 states have call successors, (74), 43 states have call predecessors, (74), 41 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2021-11-23 02:17:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 769 transitions. [2021-11-23 02:17:10,073 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 769 transitions. Word has length 48 [2021-11-23 02:17:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:10,073 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 769 transitions. [2021-11-23 02:17:10,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 02:17:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 769 transitions. [2021-11-23 02:17:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:17:10,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:10,077 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:10,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:10,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:10,302 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:10,302 INFO L85 PathProgramCache]: Analyzing trace with hash 12611081, now seen corresponding path program 2 times [2021-11-23 02:17:10,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:10,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397778807] [2021-11-23 02:17:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:10,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:17:10,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:10,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397778807] [2021-11-23 02:17:10,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397778807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:10,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:10,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:17:10,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733900526] [2021-11-23 02:17:10,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:10,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:10,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:10,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:17:10,356 INFO L87 Difference]: Start difference. First operand 605 states and 769 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:17:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:10,437 INFO L93 Difference]: Finished difference Result 911 states and 1154 transitions. [2021-11-23 02:17:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:10,437 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2021-11-23 02:17:10,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:10,441 INFO L225 Difference]: With dead ends: 911 [2021-11-23 02:17:10,442 INFO L226 Difference]: Without dead ends: 549 [2021-11-23 02:17:10,443 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:10,443 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 158 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:10,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 216 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-23 02:17:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 546. [2021-11-23 02:17:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 439 states have (on average 1.2619589977220957) internal successors, (554), 448 states have internal predecessors, (554), 68 states have call successors, (68), 39 states have call predecessors, (68), 37 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-23 02:17:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 687 transitions. [2021-11-23 02:17:10,492 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 687 transitions. Word has length 61 [2021-11-23 02:17:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:10,492 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 687 transitions. [2021-11-23 02:17:10,492 INFO L471 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:17:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 687 transitions. [2021-11-23 02:17:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:17:10,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:10,496 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:10,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:17:10,497 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash -920954706, now seen corresponding path program 1 times [2021-11-23 02:17:10,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:10,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095753946] [2021-11-23 02:17:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:10,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:17:10,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:10,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095753946] [2021-11-23 02:17:10,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095753946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:10,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218102327] [2021-11-23 02:17:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:10,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:10,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:10,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:10,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:17:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:17:10,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:17:10,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:10,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218102327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:10,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:10,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:17:10,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787329151] [2021-11-23 02:17:10,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:10,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:10,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:10,761 INFO L87 Difference]: Start difference. First operand 546 states and 687 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:17:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:10,857 INFO L93 Difference]: Finished difference Result 817 states and 1062 transitions. [2021-11-23 02:17:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:10,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-11-23 02:17:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:10,864 INFO L225 Difference]: With dead ends: 817 [2021-11-23 02:17:10,864 INFO L226 Difference]: Without dead ends: 678 [2021-11-23 02:17:10,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:10,866 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 152 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:10,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 270 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-11-23 02:17:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 672. [2021-11-23 02:17:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 531 states have (on average 1.2749529190207156) internal successors, (677), 541 states have internal predecessors, (677), 90 states have call successors, (90), 51 states have call predecessors, (90), 49 states have return successors, (87), 80 states have call predecessors, (87), 87 states have call successors, (87) [2021-11-23 02:17:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 854 transitions. [2021-11-23 02:17:10,917 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 854 transitions. Word has length 67 [2021-11-23 02:17:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:10,917 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 854 transitions. [2021-11-23 02:17:10,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:17:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 854 transitions. [2021-11-23 02:17:10,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:17:10,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:10,921 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:10,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:11,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:11,142 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1871310834, now seen corresponding path program 1 times [2021-11-23 02:17:11,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:11,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026691532] [2021-11-23 02:17:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:11,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:17:11,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:11,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026691532] [2021-11-23 02:17:11,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026691532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:11,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:11,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:17:11,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984357964] [2021-11-23 02:17:11,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:11,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:17:11,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:11,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:17:11,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:11,231 INFO L87 Difference]: Start difference. First operand 672 states and 854 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) [2021-11-23 02:17:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:11,530 INFO L93 Difference]: Finished difference Result 1074 states and 1397 transitions. [2021-11-23 02:17:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:17:11,531 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 [2021-11-23 02:17:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:11,537 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 02:17:11,537 INFO L226 Difference]: Without dead ends: 810 [2021-11-23 02:17:11,538 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:11,539 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 288 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:11,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 412 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:17:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-11-23 02:17:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 794. [2021-11-23 02:17:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 619 states have (on average 1.2794830371567043) internal successors, (792), 630 states have internal predecessors, (792), 112 states have call successors, (112), 63 states have call predecessors, (112), 61 states have return successors, (109), 101 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-23 02:17:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1013 transitions. [2021-11-23 02:17:11,607 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1013 transitions. Word has length 67 [2021-11-23 02:17:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:11,607 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1013 transitions. [2021-11-23 02:17:11,608 INFO L471 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) [2021-11-23 02:17:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1013 transitions. [2021-11-23 02:17:11,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:17:11,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:11,611 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:11,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:17:11,611 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:11,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1442056368, now seen corresponding path program 1 times [2021-11-23 02:17:11,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:11,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852423190] [2021-11-23 02:17:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:11,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:17:11,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:11,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852423190] [2021-11-23 02:17:11,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852423190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:11,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:11,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:17:11,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492948563] [2021-11-23 02:17:11,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:11,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:11,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:17:11,664 INFO L87 Difference]: Start difference. First operand 794 states and 1013 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) [2021-11-23 02:17:11,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:11,766 INFO L93 Difference]: Finished difference Result 1096 states and 1422 transitions. [2021-11-23 02:17:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:11,766 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 [2021-11-23 02:17:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:11,773 INFO L225 Difference]: With dead ends: 1096 [2021-11-23 02:17:11,773 INFO L226 Difference]: Without dead ends: 889 [2021-11-23 02:17:11,775 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:11,776 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 36 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:11,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 338 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-11-23 02:17:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 840. [2021-11-23 02:17:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 659 states have (on average 1.2943854324734445) internal successors, (853), 670 states have internal predecessors, (853), 115 states have call successors, (115), 66 states have call predecessors, (115), 64 states have return successors, (112), 104 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-23 02:17:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1080 transitions. [2021-11-23 02:17:11,840 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1080 transitions. Word has length 68 [2021-11-23 02:17:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:11,841 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1080 transitions. [2021-11-23 02:17:11,841 INFO L471 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) [2021-11-23 02:17:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1080 transitions. [2021-11-23 02:17:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:17:11,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:11,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-23 02:17:11,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:17:11,850 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:11,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1100603350, now seen corresponding path program 1 times [2021-11-23 02:17:11,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:11,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622932719] [2021-11-23 02:17:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:11,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:17:11,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:11,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622932719] [2021-11-23 02:17:11,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622932719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:11,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194049057] [2021-11-23 02:17:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:11,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:11,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:11,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:11,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:17:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:12,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:17:12,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:17:12,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:12,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194049057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:12,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:12,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:17:12,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015810495] [2021-11-23 02:17:12,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:12,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:12,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:12,152 INFO L87 Difference]: Start difference. First operand 840 states and 1080 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:17:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:12,241 INFO L93 Difference]: Finished difference Result 934 states and 1194 transitions. [2021-11-23 02:17:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2021-11-23 02:17:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:12,245 INFO L225 Difference]: With dead ends: 934 [2021-11-23 02:17:12,245 INFO L226 Difference]: Without dead ends: 439 [2021-11-23 02:17:12,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:12,248 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 24 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:12,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 303 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-23 02:17:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2021-11-23 02:17:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 322 states have (on average 1.360248447204969) internal successors, (438), 327 states have internal predecessors, (438), 77 states have call successors, (77), 40 states have call predecessors, (77), 39 states have return successors, (75), 72 states have call predecessors, (75), 75 states have call successors, (75) [2021-11-23 02:17:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 590 transitions. [2021-11-23 02:17:12,283 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 590 transitions. Word has length 73 [2021-11-23 02:17:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:12,284 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 590 transitions. [2021-11-23 02:17:12,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:17:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 590 transitions. [2021-11-23 02:17:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:17:12,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:12,287 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:12,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:12,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:17:12,510 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:12,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:12,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2133903562, now seen corresponding path program 1 times [2021-11-23 02:17:12,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:12,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644788239] [2021-11-23 02:17:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:12,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:17:12,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:12,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644788239] [2021-11-23 02:17:12,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644788239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:12,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:12,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:17:12,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277884538] [2021-11-23 02:17:12,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:12,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:12,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:12,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:12,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:17:12,564 INFO L87 Difference]: Start difference. First operand 439 states and 590 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) [2021-11-23 02:17:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:12,659 INFO L93 Difference]: Finished difference Result 1277 states and 1729 transitions. [2021-11-23 02:17:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:12,660 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 [2021-11-23 02:17:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:12,666 INFO L225 Difference]: With dead ends: 1277 [2021-11-23 02:17:12,666 INFO L226 Difference]: Without dead ends: 844 [2021-11-23 02:17:12,670 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:12,671 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 83 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:12,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 189 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-11-23 02:17:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 831. [2021-11-23 02:17:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 610 states have (on average 1.3311475409836067) internal successors, (812), 618 states have internal predecessors, (812), 142 states have call successors, (142), 79 states have call predecessors, (142), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2021-11-23 02:17:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1094 transitions. [2021-11-23 02:17:12,737 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1094 transitions. Word has length 88 [2021-11-23 02:17:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:12,738 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1094 transitions. [2021-11-23 02:17:12,739 INFO L471 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) [2021-11-23 02:17:12,739 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1094 transitions. [2021-11-23 02:17:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 02:17:12,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:12,743 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:12,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:17:12,743 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:12,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2018779477, now seen corresponding path program 1 times [2021-11-23 02:17:12,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:12,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493423056] [2021-11-23 02:17:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:12,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 02:17:12,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:12,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493423056] [2021-11-23 02:17:12,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493423056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:12,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7288338] [2021-11-23 02:17:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:12,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:12,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:12,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:17:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:12,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:17:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:17:13,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:13,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7288338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:13,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:13,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:17:13,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708222991] [2021-11-23 02:17:13,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:13,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:13,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:13,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:13,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:13,114 INFO L87 Difference]: Start difference. First operand 831 states and 1094 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) [2021-11-23 02:17:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:13,226 INFO L93 Difference]: Finished difference Result 1575 states and 2090 transitions. [2021-11-23 02:17:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:13,226 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 [2021-11-23 02:17:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:13,235 INFO L225 Difference]: With dead ends: 1575 [2021-11-23 02:17:13,235 INFO L226 Difference]: Without dead ends: 1023 [2021-11-23 02:17:13,237 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:13,238 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 58 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:13,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 233 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-23 02:17:13,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 907. [2021-11-23 02:17:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 674 states have (on average 1.3471810089020773) internal successors, (908), 682 states have internal predecessors, (908), 148 states have call successors, (148), 85 states have call predecessors, (148), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2021-11-23 02:17:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1202 transitions. [2021-11-23 02:17:13,313 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1202 transitions. Word has length 99 [2021-11-23 02:17:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:13,313 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1202 transitions. [2021-11-23 02:17:13,314 INFO L471 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) [2021-11-23 02:17:13,314 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1202 transitions. [2021-11-23 02:17:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 02:17:13,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:13,318 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:13,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:13,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:13,534 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash 516425044, now seen corresponding path program 2 times [2021-11-23 02:17:13,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:13,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713428988] [2021-11-23 02:17:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:13,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:17:13,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:13,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713428988] [2021-11-23 02:17:13,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713428988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:13,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935052970] [2021-11-23 02:17:13,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:17:13,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:13,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:13,604 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:13,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:17:13,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:17:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:17:13,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:17:13,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:17:14,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:17:14,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935052970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:14,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480009519] [2021-11-23 02:17:14,487 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2021-11-23 02:17:14,487 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:14,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:14,488 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:14,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:23,192 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 63 for LOIs [2021-11-23 02:17:23,198 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 112 for LOIs [2021-11-23 02:17:23,221 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-23 02:17:23,226 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-23 02:17:24,419 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 115 for LOIs [2021-11-23 02:17:24,448 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 100 for LOIs [2021-11-23 02:17:24,457 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 116 for LOIs [2021-11-23 02:17:24,723 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 110 for LOIs [2021-11-23 02:17:25,124 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 112 for LOIs [2021-11-23 02:17:25,143 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:17:39,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31789#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~p_last_write~0 0) (= 2 ~t2_st~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= ~t2_pc~0 1) (= ~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) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (= ~E_1~0 2) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:17:39,065 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:17:39,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:17:39,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2021-11-23 02:17:39,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265487633] [2021-11-23 02:17:39,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:17:39,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:17:39,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:39,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:17:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2862, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 02:17:39,068 INFO L87 Difference]: Start difference. First operand 907 states and 1202 transitions. Second operand has 13 states, 13 states have (on average 9.384615384615385) internal successors, (122), 13 states have internal predecessors, (122), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-11-23 02:17:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:40,518 INFO L93 Difference]: Finished difference Result 3264 states and 4332 transitions. [2021-11-23 02:17:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:17:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.384615384615385) internal successors, (122), 13 states have internal predecessors, (122), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 99 [2021-11-23 02:17:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:40,534 INFO L225 Difference]: With dead ends: 3264 [2021-11-23 02:17:40,535 INFO L226 Difference]: Without dead ends: 2364 [2021-11-23 02:17:40,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 262 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2876 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=868, Invalid=6272, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 02:17:40,542 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1025 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:40,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 545 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:17:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-11-23 02:17:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1940. [2021-11-23 02:17:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1439 states have (on average 1.2870048644892287) internal successors, (1852), 1450 states have internal predecessors, (1852), 307 states have call successors, (307), 194 states have call predecessors, (307), 193 states have return successors, (305), 296 states have call predecessors, (305), 305 states have call successors, (305) [2021-11-23 02:17:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 2464 transitions. [2021-11-23 02:17:40,731 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 2464 transitions. Word has length 99 [2021-11-23 02:17:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:40,731 INFO L470 AbstractCegarLoop]: Abstraction has 1940 states and 2464 transitions. [2021-11-23 02:17:40,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.384615384615385) internal successors, (122), 13 states have internal predecessors, (122), 8 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-11-23 02:17:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 2464 transitions. [2021-11-23 02:17:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 02:17:40,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:40,737 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:40,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:40,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:17:40,958 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:40,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1799284406, now seen corresponding path program 1 times [2021-11-23 02:17:40,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:40,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158157106] [2021-11-23 02:17:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:40,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 02:17:41,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:41,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158157106] [2021-11-23 02:17:41,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158157106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941587676] [2021-11-23 02:17:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:41,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:41,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:41,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:17:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:41,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:17:41,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:17:41,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:41,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941587676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:41,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:41,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-23 02:17:41,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335508362] [2021-11-23 02:17:41,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:41,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:41,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:17:41,259 INFO L87 Difference]: Start difference. First operand 1940 states and 2464 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-23 02:17:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:41,474 INFO L93 Difference]: Finished difference Result 3261 states and 4243 transitions. [2021-11-23 02:17:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 103 [2021-11-23 02:17:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:41,488 INFO L225 Difference]: With dead ends: 3261 [2021-11-23 02:17:41,488 INFO L226 Difference]: Without dead ends: 1953 [2021-11-23 02:17:41,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:17:41,493 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 79 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:41,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 230 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-11-23 02:17:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1926. [2021-11-23 02:17:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1425 states have (on average 1.2505263157894737) internal successors, (1782), 1436 states have internal predecessors, (1782), 307 states have call successors, (307), 194 states have call predecessors, (307), 193 states have return successors, (305), 296 states have call predecessors, (305), 305 states have call successors, (305) [2021-11-23 02:17:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2394 transitions. [2021-11-23 02:17:41,660 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2394 transitions. Word has length 103 [2021-11-23 02:17:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:41,661 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 2394 transitions. [2021-11-23 02:17:41,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-23 02:17:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2394 transitions. [2021-11-23 02:17:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 02:17:41,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:41,667 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:41,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:41,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:17:41,882 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash 402716856, now seen corresponding path program 1 times [2021-11-23 02:17:41,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:41,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958805723] [2021-11-23 02:17:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:41,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:17:41,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:41,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958805723] [2021-11-23 02:17:41,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958805723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:41,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:41,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:17:41,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641364805] [2021-11-23 02:17:41,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:41,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:17:41,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:17:41,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:17:41,929 INFO L87 Difference]: Start difference. First operand 1926 states and 2394 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:17:42,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:42,176 INFO L93 Difference]: Finished difference Result 3336 states and 4229 transitions. [2021-11-23 02:17:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:17:42,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-11-23 02:17:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:42,190 INFO L225 Difference]: With dead ends: 3336 [2021-11-23 02:17:42,190 INFO L226 Difference]: Without dead ends: 2049 [2021-11-23 02:17:42,195 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:42,195 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 114 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:42,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 181 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:17:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-11-23 02:17:42,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2049. [2021-11-23 02:17:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 1529 states have (on average 1.2315238718116417) internal successors, (1883), 1540 states have internal predecessors, (1883), 312 states have call successors, (312), 208 states have call predecessors, (312), 207 states have return successors, (310), 301 states have call predecessors, (310), 310 states have call successors, (310) [2021-11-23 02:17:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 2505 transitions. [2021-11-23 02:17:42,403 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 2505 transitions. Word has length 103 [2021-11-23 02:17:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:42,404 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 2505 transitions. [2021-11-23 02:17:42,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:17:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 2505 transitions. [2021-11-23 02:17:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 02:17:42,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:42,411 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:42,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:17:42,411 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash 444452179, now seen corresponding path program 1 times [2021-11-23 02:17:42,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:42,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233882752] [2021-11-23 02:17:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:42,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:17:42,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:42,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233882752] [2021-11-23 02:17:42,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233882752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:42,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048507185] [2021-11-23 02:17:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:42,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:42,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:42,478 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:42,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:17:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:42,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:17:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:17:42,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:42,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048507185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:42,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:42,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-23 02:17:42,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734008754] [2021-11-23 02:17:42,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:42,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:17:42,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:17:42,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:17:42,740 INFO L87 Difference]: Start difference. First operand 2049 states and 2505 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:17:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:42,977 INFO L93 Difference]: Finished difference Result 3044 states and 3731 transitions. [2021-11-23 02:17:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:17:42,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2021-11-23 02:17:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:42,991 INFO L225 Difference]: With dead ends: 3044 [2021-11-23 02:17:42,991 INFO L226 Difference]: Without dead ends: 2118 [2021-11-23 02:17:42,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:42,995 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 93 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:42,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 401 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:17:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-11-23 02:17:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1958. [2021-11-23 02:17:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1449 states have (on average 1.2298136645962734) internal successors, (1782), 1457 states have internal predecessors, (1782), 308 states have call successors, (308), 201 states have call predecessors, (308), 200 states have return successors, (306), 300 states have call predecessors, (306), 306 states have call successors, (306) [2021-11-23 02:17:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2396 transitions. [2021-11-23 02:17:43,195 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2396 transitions. Word has length 104 [2021-11-23 02:17:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:43,195 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 2396 transitions. [2021-11-23 02:17:43,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:17:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2396 transitions. [2021-11-23 02:17:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 02:17:43,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:43,201 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1] [2021-11-23 02:17:43,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:43,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:43,426 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:43,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:43,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2104814512, now seen corresponding path program 1 times [2021-11-23 02:17:43,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:43,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376666306] [2021-11-23 02:17:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:43,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:17:43,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:43,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376666306] [2021-11-23 02:17:43,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376666306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:43,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290102005] [2021-11-23 02:17:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:43,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:43,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:43,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:43,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:17:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:17:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:17:43,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:43,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290102005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:43,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:43,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2021-11-23 02:17:43,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850420265] [2021-11-23 02:17:43,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:43,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:43,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:43,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:43,780 INFO L87 Difference]: Start difference. First operand 1958 states and 2396 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-23 02:17:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:44,014 INFO L93 Difference]: Finished difference Result 3709 states and 4587 transitions. [2021-11-23 02:17:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:44,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 105 [2021-11-23 02:17:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:44,029 INFO L225 Difference]: With dead ends: 3709 [2021-11-23 02:17:44,030 INFO L226 Difference]: Without dead ends: 2377 [2021-11-23 02:17:44,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:44,035 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 72 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:44,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 137 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:17:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2021-11-23 02:17:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2329. [2021-11-23 02:17:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1786 states have (on average 1.202127659574468) internal successors, (2147), 1794 states have internal predecessors, (2147), 311 states have call successors, (311), 232 states have call predecessors, (311), 231 states have return successors, (336), 303 states have call predecessors, (336), 309 states have call successors, (336) [2021-11-23 02:17:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 2794 transitions. [2021-11-23 02:17:44,264 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 2794 transitions. Word has length 105 [2021-11-23 02:17:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:44,264 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 2794 transitions. [2021-11-23 02:17:44,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-23 02:17:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 2794 transitions. [2021-11-23 02:17:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:17:44,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:44,270 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:44,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:44,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:44,486 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash 95993481, now seen corresponding path program 1 times [2021-11-23 02:17:44,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:44,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007955616] [2021-11-23 02:17:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:44,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:17:44,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007955616] [2021-11-23 02:17:44,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007955616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454297803] [2021-11-23 02:17:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:44,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:44,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:44,545 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:44,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:17:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:17:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:17:44,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:44,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454297803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:44,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:44,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:17:44,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491226303] [2021-11-23 02:17:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:44,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:44,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:44,768 INFO L87 Difference]: Start difference. First operand 2329 states and 2794 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-23 02:17:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:45,016 INFO L93 Difference]: Finished difference Result 4190 states and 5054 transitions. [2021-11-23 02:17:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:45,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 [2021-11-23 02:17:45,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:45,034 INFO L225 Difference]: With dead ends: 4190 [2021-11-23 02:17:45,034 INFO L226 Difference]: Without dead ends: 2745 [2021-11-23 02:17:45,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:45,041 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 50 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:45,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 239 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-11-23 02:17:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2466. [2021-11-23 02:17:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 1899 states have (on average 1.2101105845181674) internal successors, (2298), 1907 states have internal predecessors, (2298), 323 states have call successors, (323), 244 states have call predecessors, (323), 243 states have return successors, (348), 315 states have call predecessors, (348), 321 states have call successors, (348) [2021-11-23 02:17:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 2969 transitions. [2021-11-23 02:17:45,332 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 2969 transitions. Word has length 102 [2021-11-23 02:17:45,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:45,333 INFO L470 AbstractCegarLoop]: Abstraction has 2466 states and 2969 transitions. [2021-11-23 02:17:45,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-23 02:17:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 2969 transitions. [2021-11-23 02:17:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:17:45,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:45,340 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:45,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:45,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 02:17:45,554 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2064812840, now seen corresponding path program 1 times [2021-11-23 02:17:45,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:45,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263431968] [2021-11-23 02:17:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:45,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:17:45,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:45,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263431968] [2021-11-23 02:17:45,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263431968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:45,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975340150] [2021-11-23 02:17:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:45,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:45,599 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:45,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:17:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:45,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:17:45,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:17:45,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:45,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975340150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:45,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:45,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-23 02:17:45,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505468266] [2021-11-23 02:17:45,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:45,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:45,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:45,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:17:45,877 INFO L87 Difference]: Start difference. First operand 2466 states and 2969 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) [2021-11-23 02:17:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:46,113 INFO L93 Difference]: Finished difference Result 4141 states and 5100 transitions. [2021-11-23 02:17:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:46,113 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 [2021-11-23 02:17:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:46,128 INFO L225 Difference]: With dead ends: 4141 [2021-11-23 02:17:46,129 INFO L226 Difference]: Without dead ends: 2461 [2021-11-23 02:17:46,134 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:46,135 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 79 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:46,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 243 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:17:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-11-23 02:17:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2436. [2021-11-23 02:17:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 1869 states have (on average 1.1738897806313537) internal successors, (2194), 1877 states have internal predecessors, (2194), 323 states have call successors, (323), 244 states have call predecessors, (323), 243 states have return successors, (348), 315 states have call predecessors, (348), 321 states have call successors, (348) [2021-11-23 02:17:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 2865 transitions. [2021-11-23 02:17:46,377 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 2865 transitions. Word has length 102 [2021-11-23 02:17:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:46,378 INFO L470 AbstractCegarLoop]: Abstraction has 2436 states and 2865 transitions. [2021-11-23 02:17:46,379 INFO L471 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) [2021-11-23 02:17:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 2865 transitions. [2021-11-23 02:17:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 02:17:46,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:46,384 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:46,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:46,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 02:17:46,610 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 384555148, now seen corresponding path program 1 times [2021-11-23 02:17:46,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:46,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539358599] [2021-11-23 02:17:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:46,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:17:46,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:46,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539358599] [2021-11-23 02:17:46,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539358599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:46,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468887317] [2021-11-23 02:17:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:46,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:46,683 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:46,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:17:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:46,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:17:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:17:46,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:46,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468887317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:46,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:46,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-11-23 02:17:46,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750257361] [2021-11-23 02:17:46,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:46,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:17:46,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:17:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:17:46,988 INFO L87 Difference]: Start difference. First operand 2436 states and 2865 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) [2021-11-23 02:17:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:47,308 INFO L93 Difference]: Finished difference Result 4741 states and 5631 transitions. [2021-11-23 02:17:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:17:47,309 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 [2021-11-23 02:17:47,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:47,327 INFO L225 Difference]: With dead ends: 4741 [2021-11-23 02:17:47,327 INFO L226 Difference]: Without dead ends: 3120 [2021-11-23 02:17:47,333 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:47,334 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 128 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:47,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 251 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:17:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2021-11-23 02:17:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2784. [2021-11-23 02:17:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2184 states have (on average 1.1478937728937728) internal successors, (2507), 2195 states have internal predecessors, (2507), 329 states have call successors, (329), 269 states have call predecessors, (329), 270 states have return successors, (370), 320 states have call predecessors, (370), 327 states have call successors, (370) [2021-11-23 02:17:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3206 transitions. [2021-11-23 02:17:47,633 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3206 transitions. Word has length 103 [2021-11-23 02:17:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:47,633 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 3206 transitions. [2021-11-23 02:17:47,633 INFO L471 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) [2021-11-23 02:17:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3206 transitions. [2021-11-23 02:17:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 02:17:47,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:47,639 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:47,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:47,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:47,854 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:47,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1654851778, now seen corresponding path program 1 times [2021-11-23 02:17:47,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:47,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622792485] [2021-11-23 02:17:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:47,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:17:47,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:47,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622792485] [2021-11-23 02:17:47,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622792485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:47,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:47,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:17:47,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228057365] [2021-11-23 02:17:47,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:47,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:17:47,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:47,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:17:47,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:17:47,917 INFO L87 Difference]: Start difference. First operand 2784 states and 3206 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) [2021-11-23 02:17:48,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:48,345 INFO L93 Difference]: Finished difference Result 5416 states and 6291 transitions. [2021-11-23 02:17:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:17:48,345 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 [2021-11-23 02:17:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:48,362 INFO L225 Difference]: With dead ends: 5416 [2021-11-23 02:17:48,362 INFO L226 Difference]: Without dead ends: 3526 [2021-11-23 02:17:48,367 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:48,368 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 80 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:48,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 292 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:17:48,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3526 states. [2021-11-23 02:17:48,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3526 to 3423. [2021-11-23 02:17:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 2667 states have (on average 1.1436070491188601) internal successors, (3050), 2678 states have internal predecessors, (3050), 415 states have call successors, (415), 337 states have call predecessors, (415), 340 states have return successors, (491), 408 states have call predecessors, (491), 413 states have call successors, (491) [2021-11-23 02:17:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 3956 transitions. [2021-11-23 02:17:48,714 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 3956 transitions. Word has length 104 [2021-11-23 02:17:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:48,715 INFO L470 AbstractCegarLoop]: Abstraction has 3423 states and 3956 transitions. [2021-11-23 02:17:48,716 INFO L471 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) [2021-11-23 02:17:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 3956 transitions. [2021-11-23 02:17:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 02:17:48,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:48,723 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:48,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:17:48,723 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash 102828130, now seen corresponding path program 1 times [2021-11-23 02:17:48,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:48,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863625726] [2021-11-23 02:17:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:48,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:17:48,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:48,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863625726] [2021-11-23 02:17:48,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863625726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:48,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212948414] [2021-11-23 02:17:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:48,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:48,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:48,792 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:48,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:17:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:48,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:17:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:49,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:17:49,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212948414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:49,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:17:49,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2021-11-23 02:17:49,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799654531] [2021-11-23 02:17:49,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:49,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:17:49,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:49,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:17:49,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:17:49,084 INFO L87 Difference]: Start difference. First operand 3423 states and 3956 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) [2021-11-23 02:17:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:49,718 INFO L93 Difference]: Finished difference Result 6801 states and 7902 transitions. [2021-11-23 02:17:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:17:49,719 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 [2021-11-23 02:17:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:49,754 INFO L225 Difference]: With dead ends: 6801 [2021-11-23 02:17:49,754 INFO L226 Difference]: Without dead ends: 4441 [2021-11-23 02:17:49,761 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:17:49,761 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 182 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:49,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 365 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:17:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2021-11-23 02:17:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 4323. [2021-11-23 02:17:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 3367 states have (on average 1.1381051381051381) internal successors, (3832), 3375 states have internal predecessors, (3832), 529 states have call successors, (529), 427 states have call predecessors, (529), 426 states have return successors, (646), 521 states have call predecessors, (646), 527 states have call successors, (646) [2021-11-23 02:17:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 5007 transitions. [2021-11-23 02:17:50,150 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 5007 transitions. Word has length 104 [2021-11-23 02:17:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:50,150 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 5007 transitions. [2021-11-23 02:17:50,150 INFO L471 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) [2021-11-23 02:17:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 5007 transitions. [2021-11-23 02:17:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 02:17:50,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:50,156 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:17:50,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:17:50,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 02:17:50,370 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:50,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:50,370 INFO L85 PathProgramCache]: Analyzing trace with hash 659752468, now seen corresponding path program 1 times [2021-11-23 02:17:50,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:50,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726975796] [2021-11-23 02:17:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:50,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:17:50,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726975796] [2021-11-23 02:17:50,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726975796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850820350] [2021-11-23 02:17:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:50,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:50,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:50,454 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:50,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:17:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:17:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:17:50,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-23 02:17:51,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850820350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:51,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286410278] [2021-11-23 02:17:51,153 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2021-11-23 02:17:51,153 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:51,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:51,154 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:51,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:58,907 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 178 for LOIs [2021-11-23 02:18:07,057 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 120 for LOIs [2021-11-23 02:18:07,100 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 184 for LOIs [2021-11-23 02:18:07,157 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 115 for LOIs [2021-11-23 02:18:07,287 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 62 for LOIs [2021-11-23 02:18:07,729 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 208 for LOIs [2021-11-23 02:18:09,130 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:32,716 WARN L227 SmtUtils]: Spent 11.75s on a formula simplification. DAG size of input: 524 DAG size of output: 333 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:18:43,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1286410278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:43,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:18:43,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 8, 6] total 59 [2021-11-23 02:18:43,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703031078] [2021-11-23 02:18:43,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:43,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 02:18:43,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:43,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 02:18:43,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 02:18:43,303 INFO L87 Difference]: Start difference. First operand 4323 states and 5007 transitions. Second operand has 45 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:19:00,279 WARN L227 SmtUtils]: Spent 8.63s on a formula simplification. DAG size of input: 282 DAG size of output: 282 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:19:34,769 WARN L227 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 281 DAG size of output: 279 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:19:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:37,905 INFO L93 Difference]: Finished difference Result 8218 states and 9525 transitions. [2021-11-23 02:19:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-23 02:19:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 110 [2021-11-23 02:19:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:37,929 INFO L225 Difference]: With dead ends: 8218 [2021-11-23 02:19:37,929 INFO L226 Difference]: Without dead ends: 4158 [2021-11-23 02:19:37,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 268 SyntacticMatches, 13 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5961 ImplicationChecksByTransitivity, 85.3s TimeCoverageRelationStatistics Valid=1497, Invalid=15015, Unknown=0, NotChecked=0, Total=16512 [2021-11-23 02:19:37,944 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 345 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:37,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 842 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:19:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2021-11-23 02:19:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 4133. [2021-11-23 02:19:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 3218 states have (on average 1.1364201367308888) internal successors, (3657), 3226 states have internal predecessors, (3657), 505 states have call successors, (505), 411 states have call predecessors, (505), 409 states have return successors, (620), 496 states have call predecessors, (620), 503 states have call successors, (620) [2021-11-23 02:19:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 4782 transitions. [2021-11-23 02:19:38,342 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 4782 transitions. Word has length 110 [2021-11-23 02:19:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:38,345 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 4782 transitions. [2021-11-23 02:19:38,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:19:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 4782 transitions. [2021-11-23 02:19:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:19:38,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:38,352 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:19:38,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:19:38,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 02:19:38,566 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:38,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:38,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1709883232, now seen corresponding path program 1 times [2021-11-23 02:19:38,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:38,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192617355] [2021-11-23 02:19:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:38,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:19:38,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192617355] [2021-11-23 02:19:38,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192617355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:19:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776386023] [2021-11-23 02:19:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:38,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:38,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:38,654 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:19:38,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:19:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:38,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:19:38,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:19:38,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:19:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 02:19:39,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776386023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:19:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [211673569] [2021-11-23 02:19:39,363 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2021-11-23 02:19:39,363 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:19:39,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:19:39,364 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:19:39,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:19:45,878 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 179 for LOIs [2021-11-23 02:19:51,703 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 121 for LOIs [2021-11-23 02:19:51,747 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 185 for LOIs [2021-11-23 02:19:51,802 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 115 for LOIs [2021-11-23 02:19:51,924 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 110 for LOIs [2021-11-23 02:19:52,315 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 209 for LOIs [2021-11-23 02:19:53,900 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:20:11,442 WARN L227 SmtUtils]: Spent 8.96s on a formula simplification. DAG size of input: 445 DAG size of output: 282 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:20:21,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [211673569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:21,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:20:21,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [8, 8, 6] total 62 [2021-11-23 02:20:21,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018423825] [2021-11-23 02:20:21,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:21,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 02:20:21,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:21,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 02:20:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=3379, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 02:20:21,689 INFO L87 Difference]: Start difference. First operand 4133 states and 4782 transitions. Second operand has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:20:35,577 WARN L227 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 265 DAG size of output: 245 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:21:12,571 WARN L227 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 258 DAG size of output: 242 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:21:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:15,492 INFO L93 Difference]: Finished difference Result 6748 states and 7819 transitions. [2021-11-23 02:21:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-23 02:21:15,493 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 112 [2021-11-23 02:21:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:15,502 INFO L225 Difference]: With dead ends: 6748 [2021-11-23 02:21:15,502 INFO L226 Difference]: Without dead ends: 3382 [2021-11-23 02:21:15,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 267 SyntacticMatches, 17 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7815 ImplicationChecksByTransitivity, 78.1s TimeCoverageRelationStatistics Valid=1824, Invalid=18768, Unknown=0, NotChecked=0, Total=20592 [2021-11-23 02:21:15,515 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 379 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:15,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 995 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2750 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:21:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2021-11-23 02:21:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 3334. [2021-11-23 02:21:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 2587 states have (on average 1.1325860069578662) internal successors, (2930), 2596 states have internal predecessors, (2930), 412 states have call successors, (412), 336 states have call predecessors, (412), 334 states have return successors, (501), 402 states have call predecessors, (501), 410 states have call successors, (501) [2021-11-23 02:21:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 3843 transitions. [2021-11-23 02:21:15,773 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 3843 transitions. Word has length 112 [2021-11-23 02:21:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:15,773 INFO L470 AbstractCegarLoop]: Abstraction has 3334 states and 3843 transitions. [2021-11-23 02:21:15,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:21:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 3843 transitions. [2021-11-23 02:21:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 02:21:15,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:15,779 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:21:15,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:21:15,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:15,994 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1981403116, now seen corresponding path program 1 times [2021-11-23 02:21:15,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:15,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347713359] [2021-11-23 02:21:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:15,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:21:16,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347713359] [2021-11-23 02:21:16,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347713359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:21:16,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857621700] [2021-11-23 02:21:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:16,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:16,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:16,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:21:16,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:21:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:21:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:21:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:21:16,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:21:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-23 02:21:16,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857621700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:21:16,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137307351] [2021-11-23 02:21:16,951 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2021-11-23 02:21:16,951 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:21:16,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:21:16,952 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:21:16,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:21:23,001 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 179 for LOIs [2021-11-23 02:21:27,452 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 121 for LOIs [2021-11-23 02:21:27,496 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 185 for LOIs [2021-11-23 02:21:27,552 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 115 for LOIs [2021-11-23 02:21:27,687 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 63 for LOIs [2021-11-23 02:21:28,136 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 209 for LOIs [2021-11-23 02:21:28,559 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:21:47,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [137307351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:47,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:21:47,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [13, 9, 6] total 68 [2021-11-23 02:21:47,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275501359] [2021-11-23 02:21:47,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:47,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 02:21:47,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 02:21:47,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=4167, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 02:21:47,962 INFO L87 Difference]: Start difference. First operand 3334 states and 3843 transitions. Second operand has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:22:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:26,741 INFO L93 Difference]: Finished difference Result 5846 states and 6769 transitions. [2021-11-23 02:22:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-23 02:22:26,742 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 113 [2021-11-23 02:22:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:26,753 INFO L225 Difference]: With dead ends: 5846 [2021-11-23 02:22:26,753 INFO L226 Difference]: Without dead ends: 2842 [2021-11-23 02:22:26,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 274 SyntacticMatches, 17 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8893 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=1818, Invalid=20832, Unknown=0, NotChecked=0, Total=22650 [2021-11-23 02:22:26,763 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 370 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 3338 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 3511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:26,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 1196 Invalid, 3511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3338 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 02:22:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-11-23 02:22:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2793. [2021-11-23 02:22:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2160 states have (on average 1.1287037037037038) internal successors, (2438), 2169 states have internal predecessors, (2438), 349 states have call successors, (349), 285 states have call predecessors, (349), 283 states have return successors, (433), 339 states have call predecessors, (433), 347 states have call successors, (433) [2021-11-23 02:22:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3220 transitions. [2021-11-23 02:22:27,106 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3220 transitions. Word has length 113 [2021-11-23 02:22:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:27,107 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 3220 transitions. [2021-11-23 02:22:27,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 12 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:22:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3220 transitions. [2021-11-23 02:22:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:22:27,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:27,112 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:27,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:22:27,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 02:22:27,334 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2103172566, now seen corresponding path program 1 times [2021-11-23 02:22:27,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:27,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687084570] [2021-11-23 02:22:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:27,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:22:27,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687084570] [2021-11-23 02:22:27,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687084570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:22:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561402954] [2021-11-23 02:22:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:27,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:22:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:22:27,638 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:22:27,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:22:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:27,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 02:22:27,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:22:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 02:22:28,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:22:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:22:29,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561402954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:22:29,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847135895] [2021-11-23 02:22:29,019 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2021-11-23 02:22:29,019 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:22:29,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:22:29,020 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:22:29,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:22:45,472 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 59 for LOIs [2021-11-23 02:22:45,477 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 180 for LOIs [2021-11-23 02:22:46,025 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 64 for LOIs [2021-11-23 02:22:46,036 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 186 for LOIs [2021-11-23 02:22:46,091 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 116 for LOIs [2021-11-23 02:22:46,358 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 62 for LOIs [2021-11-23 02:22:46,719 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 131 for LOIs [2021-11-23 02:22:46,755 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:23:07,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '177829#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~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 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~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) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2021-11-23 02:23:07,000 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:23:07,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:23:07,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2021-11-23 02:23:07,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952044343] [2021-11-23 02:23:07,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:23:07,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 02:23:07,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 02:23:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=7808, Unknown=0, NotChecked=0, Total=8372 [2021-11-23 02:23:07,003 INFO L87 Difference]: Start difference. First operand 2793 states and 3220 transitions. Second operand has 36 states, 24 states have (on average 7.166666666666667) internal successors, (172), 27 states have internal predecessors, (172), 14 states have call successors, (41), 11 states have call predecessors, (41), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2021-11-23 02:23:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:11,270 INFO L93 Difference]: Finished difference Result 6023 states and 7192 transitions. [2021-11-23 02:23:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-23 02:23:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 7.166666666666667) internal successors, (172), 27 states have internal predecessors, (172), 14 states have call successors, (41), 11 states have call predecessors, (41), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 115 [2021-11-23 02:23:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:11,279 INFO L225 Difference]: With dead ends: 6023 [2021-11-23 02:23:11,279 INFO L226 Difference]: Without dead ends: 3638 [2021-11-23 02:23:11,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 289 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7530 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=2004, Invalid=18302, Unknown=0, NotChecked=0, Total=20306 [2021-11-23 02:23:11,287 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 2501 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 1598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2501 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 4272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1598 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:11,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2501 Valid, 1004 Invalid, 4272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1598 Valid, 2674 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 02:23:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-11-23 02:23:11,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2213. [2021-11-23 02:23:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 1673 states have (on average 1.1159593544530784) internal successors, (1867), 1683 states have internal predecessors, (1867), 309 states have call successors, (309), 231 states have call predecessors, (309), 230 states have return successors, (307), 299 states have call predecessors, (307), 307 states have call successors, (307) [2021-11-23 02:23:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 2483 transitions. [2021-11-23 02:23:11,587 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 2483 transitions. Word has length 115 [2021-11-23 02:23:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:11,587 INFO L470 AbstractCegarLoop]: Abstraction has 2213 states and 2483 transitions. [2021-11-23 02:23:11,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 7.166666666666667) internal successors, (172), 27 states have internal predecessors, (172), 14 states have call successors, (41), 11 states have call predecessors, (41), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2021-11-23 02:23:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 2483 transitions. [2021-11-23 02:23:11,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 02:23:11,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:11,591 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:23:11,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:11,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:11,806 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:11,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 667336366, now seen corresponding path program 1 times [2021-11-23 02:23:11,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:11,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371758203] [2021-11-23 02:23:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:11,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 02:23:11,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:11,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371758203] [2021-11-23 02:23:11,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371758203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:11,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:11,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:23:11,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693092001] [2021-11-23 02:23:11,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:11,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:23:11,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:11,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:23:11,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:23:11,890 INFO L87 Difference]: Start difference. First operand 2213 states and 2483 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) [2021-11-23 02:23:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:12,567 INFO L93 Difference]: Finished difference Result 5810 states and 6573 transitions. [2021-11-23 02:23:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:23:12,567 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 [2021-11-23 02:23:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:12,581 INFO L225 Difference]: With dead ends: 5810 [2021-11-23 02:23:12,581 INFO L226 Difference]: Without dead ends: 4602 [2021-11-23 02:23:12,586 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:23:12,587 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 232 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:12,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 556 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:23:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2021-11-23 02:23:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 3418. [2021-11-23 02:23:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 2566 states have (on average 1.1231488698363212) internal successors, (2882), 2576 states have internal predecessors, (2882), 495 states have call successors, (495), 357 states have call predecessors, (495), 356 states have return successors, (493), 485 states have call predecessors, (493), 493 states have call successors, (493) [2021-11-23 02:23:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 3870 transitions. [2021-11-23 02:23:13,096 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 3870 transitions. Word has length 128 [2021-11-23 02:23:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:13,096 INFO L470 AbstractCegarLoop]: Abstraction has 3418 states and 3870 transitions. [2021-11-23 02:23:13,096 INFO L471 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) [2021-11-23 02:23:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 3870 transitions. [2021-11-23 02:23:13,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-23 02:23:13,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:13,100 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:23:13,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 02:23:13,100 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash -701066993, now seen corresponding path program 1 times [2021-11-23 02:23:13,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:13,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517327254] [2021-11-23 02:23:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:13,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:23:13,129 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:23:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:23:13,259 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:23:13,259 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:23:13,261 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location error2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-23 02:23:13,263 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-23 02:23:13,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 02:23:13,267 INFO L732 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] [2021-11-23 02:23:13,272 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:23:13,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:23:13 BoogieIcfgContainer [2021-11-23 02:23:13,456 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:23:13,456 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:23:13,456 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:23:13,457 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:23:13,457 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:16:50" (3/4) ... [2021-11-23 02:23:13,459 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 02:23:13,640 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:23:13,641 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:23:13,641 INFO L158 Benchmark]: Toolchain (without parser) took 384615.00ms. Allocated memory was 79.7MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 43.2MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 167.9MB. Max. memory is 16.1GB. [2021-11-23 02:23:13,641 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory was 59.7MB in the beginning and 59.7MB in the end (delta: 75.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:23:13,648 INFO L158 Benchmark]: CACSL2BoogieTranslator took 481.66ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 42.9MB in the beginning and 67.8MB in the end (delta: -24.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:23:13,649 INFO L158 Benchmark]: Boogie Procedure Inliner took 87.41ms. Allocated memory is still 96.5MB. Free memory was 67.8MB in the beginning and 65.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:23:13,650 INFO L158 Benchmark]: Boogie Preprocessor took 39.98ms. Allocated memory is still 96.5MB. Free memory was 65.0MB in the beginning and 62.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:23:13,651 INFO L158 Benchmark]: RCFGBuilder took 1107.58ms. Allocated memory is still 96.5MB. Free memory was 62.5MB in the beginning and 56.8MB in the end (delta: 5.7MB). Peak memory consumption was 30.9MB. Max. memory is 16.1GB. [2021-11-23 02:23:13,651 INFO L158 Benchmark]: TraceAbstraction took 382707.41ms. Allocated memory was 96.5MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 56.3MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 139.4MB. Max. memory is 16.1GB. [2021-11-23 02:23:13,652 INFO L158 Benchmark]: Witness Printer took 184.32ms. Allocated memory is still 1.3GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-23 02:23:13,655 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory was 59.7MB in the beginning and 59.7MB in the end (delta: 75.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 481.66ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 42.9MB in the beginning and 67.8MB in the end (delta: -24.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 87.41ms. Allocated memory is still 96.5MB. Free memory was 67.8MB in the beginning and 65.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.98ms. Allocated memory is still 96.5MB. Free memory was 65.0MB in the beginning and 62.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1107.58ms. Allocated memory is still 96.5MB. Free memory was 62.5MB in the beginning and 56.8MB in the end (delta: 5.7MB). Peak memory consumption was 30.9MB. Max. memory is 16.1GB. * TraceAbstraction took 382707.41ms. Allocated memory was 96.5MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 56.3MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 139.4MB. Max. memory is 16.1GB. * Witness Printer took 184.32ms. Allocated memory is still 1.3GB. Free memory was 1.1GB in the beginning and 1.1GB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. 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: 390]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int q_buf_0 ; [L33] int q_free ; [L34] int q_read_ev ; [L35] int q_write_ev ; [L36] int p_num_write ; [L37] int p_last_write ; [L38] int p_dw_st ; [L39] int p_dw_pc ; [L40] int p_dw_i ; [L41] int c_num_read ; [L42] int c_last_read ; [L43] int c_dr_st ; [L44] int c_dr_pc ; [L45] int c_dr_i ; [L152] static int a_t ; [L394] int m_pc = 0; [L395] int t1_pc = 0; [L396] int t2_pc = 0; [L397] int m_st ; [L398] int t1_st ; [L399] int t2_st ; [L400] int m_i ; [L401] int t1_i ; [L402] int t2_i ; [L403] int M_E = 2; [L404] int T1_E = 2; [L405] int T2_E = 2; [L406] int E_M = 2; [L407] int E_1 = 2; [L408] int E_2 = 2; [L413] int token ; [L415] int local ; [L993] COND FALSE !(__VERIFIER_nondet_int()) [L996] CALL main2() [L980] int __retres1 ; [L984] CALL init_model2() [L894] m_i = 1 [L895] t1_i = 1 [L896] t2_i = 1 [L984] RET init_model2() [L985] CALL start_simulation2() [L921] int kernel_st ; [L922] int tmp ; [L923] int tmp___0 ; [L927] 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_free=0, q_read_ev=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] [L928] 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_free=0, q_read_ev=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] [L929] CALL init_threads2() [L613] COND TRUE m_i == 1 [L614] m_st = 0 [L618] COND TRUE t1_i == 1 [L619] t1_st = 0 [L623] COND TRUE t2_i == 1 [L624] t2_st = 0 [L929] RET init_threads2() [L930] 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_free=0, q_read_ev=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] [L726] COND FALSE !(M_E == 0) [L731] COND FALSE !(T1_E == 0) [L736] COND FALSE !(T2_E == 0) [L741] COND FALSE !(E_M == 0) [L746] COND FALSE !(E_1 == 0) [L751] COND FALSE !(E_2 == 0) [L930] 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_free=0, q_read_ev=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] [L931] 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_free=0, q_read_ev=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] [L799] int tmp ; [L800] int tmp___0 ; [L801] int tmp___1 ; [L805] CALL, EXPR is_master_triggered() [L545] 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_free=0, q_read_ev=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] [L548] 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_free=0, q_read_ev=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] [L558] __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_free=0, q_read_ev=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] [L560] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L564] 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_free=0, q_read_ev=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] [L567] 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_free=0, q_read_ev=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] [L577] __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_free=0, q_read_ev=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] [L579] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L821] CALL, EXPR is_transmit2_triggered() [L583] 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_free=0, q_read_ev=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] [L586] 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_free=0, q_read_ev=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] [L596] __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_free=0, q_read_ev=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] [L598] return (__retres1); [L821] RET, EXPR is_transmit2_triggered() [L821] tmp___1 = is_transmit2_triggered() [L823] COND FALSE !(\read(tmp___1)) [L931] 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_free=0, q_read_ev=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] [L932] 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_free=0, q_read_ev=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] [L764] COND FALSE !(M_E == 1) [L769] COND FALSE !(T1_E == 1) [L774] COND FALSE !(T2_E == 1) [L779] COND FALSE !(E_M == 1) [L784] COND FALSE !(E_1 == 1) [L789] COND FALSE !(E_2 == 1) [L932] 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_free=0, q_read_ev=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] [L935] COND TRUE 1 [L938] kernel_st = 1 [L939] CALL eval2() [L659] 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_free=0, q_read_ev=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] [L663] 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_free=0, q_read_ev=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] 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_free=0, q_read_ev=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] [L633] int __retres1 ; [L636] COND TRUE m_st == 0 [L637] __retres1 = 1 [L654] return (__retres1); [L666] 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_free=0, q_read_ev=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] tmp = exists_runnable_thread2() [L668] 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_free=0, q_read_ev=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] [L673] COND TRUE m_st == 0 [L674] int tmp_ndt_1; [L675] tmp_ndt_1 = __VERIFIER_nondet_int() [L676] 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_free=0, q_read_ev=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] [L687] COND TRUE t1_st == 0 [L688] int tmp_ndt_2; [L689] tmp_ndt_2 = __VERIFIER_nondet_int() [L690] COND TRUE \read(tmp_ndt_2) [L692] t1_st = 1 [L693] CALL transmit1() [L476] 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_free=0, q_read_ev=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] [L487] COND TRUE 1 [L489] t1_pc = 1 [L490] t1_st = 2 [L693] RET transmit1() [L701] COND TRUE t2_st == 0 [L702] int tmp_ndt_3; [L703] tmp_ndt_3 = __VERIFIER_nondet_int() [L704] COND TRUE \read(tmp_ndt_3) [L706] t2_st = 1 [L707] CALL transmit2() [L512] 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_free=0, q_read_ev=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] [L523] COND TRUE 1 [L525] t2_pc = 1 [L526] t2_st = 2 [L707] RET transmit2() [L663] 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_free=0, q_read_ev=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] [L666] 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_free=0, q_read_ev=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] [L633] int __retres1 ; [L636] COND TRUE m_st == 0 [L637] __retres1 = 1 [L654] return (__retres1); [L666] 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_free=0, q_read_ev=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] [L666] tmp = exists_runnable_thread2() [L668] 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_free=0, q_read_ev=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] [L673] COND TRUE m_st == 0 [L674] int tmp_ndt_1; [L675] tmp_ndt_1 = __VERIFIER_nondet_int() [L676] COND TRUE \read(tmp_ndt_1) [L678] m_st = 1 [L679] CALL master() [L418] int tmp_var = __VERIFIER_nondet_int(); [L420] 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_free=0, q_read_ev=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] [L431] COND TRUE 1 [L434] token = __VERIFIER_nondet_int() [L435] local = token [L436] 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_free=0, q_read_ev=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] [L437] 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_free=0, q_read_ev=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] [L837] 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_free=0, q_read_ev=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] [L799] int tmp ; [L800] int tmp___0 ; [L801] int tmp___1 ; [L805] CALL, EXPR is_master_triggered() [L545] 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_free=0, q_read_ev=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] [L548] 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_free=0, q_read_ev=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] [L558] __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_free=0, q_read_ev=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] [L560] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L564] 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_free=0, q_read_ev=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] [L567] 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_free=0, q_read_ev=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] [L568] COND TRUE E_1 == 1 [L569] __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_free=0, q_read_ev=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] [L579] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND TRUE \read(tmp___0) [L816] t1_st = 0 [L821] CALL, EXPR is_transmit2_triggered() [L583] 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_free=0, q_read_ev=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] [L586] 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_free=0, q_read_ev=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] [L587] 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_free=0, q_read_ev=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] [L596] __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_free=0, q_read_ev=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] [L598] return (__retres1); [L821] RET, EXPR is_transmit2_triggered() [L821] tmp___1 = is_transmit2_triggered() [L823] COND FALSE !(\read(tmp___1)) [L837] 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_free=0, q_read_ev=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] [L437] 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_free=0, q_read_ev=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] [L438] E_1 = 2 [L439] m_pc = 1 [L440] 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_free=0, q_read_ev=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] [L679] RET master() [L687] COND TRUE t1_st == 0 [L688] int tmp_ndt_2; [L689] tmp_ndt_2 = __VERIFIER_nondet_int() [L690] COND TRUE \read(tmp_ndt_2) [L692] t1_st = 1 [L693] CALL transmit1() [L476] 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_free=0, q_read_ev=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] [L479] COND TRUE t1_pc == 1 [L495] token += 1 [L496] 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_free=0, q_read_ev=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] [L497] 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_free=0, q_read_ev=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] [L837] 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_free=0, q_read_ev=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] [L799] int tmp ; [L800] int tmp___0 ; [L801] int tmp___1 ; [L805] CALL, EXPR is_master_triggered() [L545] 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_free=0, q_read_ev=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] [L548] 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_free=0, q_read_ev=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] [L549] 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_free=0, q_read_ev=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] [L558] __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_free=0, q_read_ev=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] [L560] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND FALSE !(\read(tmp)) [L813] CALL, EXPR is_transmit1_triggered() [L564] 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_free=0, q_read_ev=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] [L567] 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_free=0, q_read_ev=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] [L568] 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_free=0, q_read_ev=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] [L577] __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_free=0, q_read_ev=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] [L579] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L821] CALL, EXPR is_transmit2_triggered() [L583] 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_free=0, q_read_ev=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] [L586] 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_free=0, q_read_ev=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] [L587] COND TRUE E_2 == 1 [L588] __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_free=0, q_read_ev=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] [L598] return (__retres1); [L821] RET, EXPR is_transmit2_triggered() [L821] tmp___1 = is_transmit2_triggered() [L823] COND TRUE \read(tmp___1) [L824] t2_st = 0 [L837] 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_free=0, q_read_ev=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] [L497] 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_free=0, q_read_ev=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] [L498] 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_free=0, q_read_ev=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] [L487] COND TRUE 1 [L489] t1_pc = 1 [L490] t1_st = 2 [L693] RET transmit1() [L701] COND TRUE t2_st == 0 [L702] int tmp_ndt_3; [L703] tmp_ndt_3 = __VERIFIER_nondet_int() [L704] COND TRUE \read(tmp_ndt_3) [L706] t2_st = 1 [L707] CALL transmit2() [L512] 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_free=0, q_read_ev=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] [L515] COND TRUE t2_pc == 1 [L531] token += 1 [L532] 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_free=0, q_read_ev=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] [L533] 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_free=0, q_read_ev=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] [L837] 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_free=0, q_read_ev=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] [L799] int tmp ; [L800] int tmp___0 ; [L801] int tmp___1 ; [L805] CALL, EXPR is_master_triggered() [L545] 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_free=0, q_read_ev=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] [L548] 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_free=0, q_read_ev=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] [L549] COND TRUE E_M == 1 [L550] __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_free=0, q_read_ev=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] [L560] return (__retres1); [L805] RET, EXPR is_master_triggered() [L805] tmp = is_master_triggered() [L807] COND TRUE \read(tmp) [L808] m_st = 0 [L813] CALL, EXPR is_transmit1_triggered() [L564] 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_free=0, q_read_ev=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] [L567] 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_free=0, q_read_ev=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] [L568] 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_free=0, q_read_ev=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] [L577] __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_free=0, q_read_ev=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] [L579] return (__retres1); [L813] RET, EXPR is_transmit1_triggered() [L813] tmp___0 = is_transmit1_triggered() [L815] COND FALSE !(\read(tmp___0)) [L821] CALL, EXPR is_transmit2_triggered() [L583] 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_free=0, q_read_ev=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] [L586] 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_free=0, q_read_ev=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] [L587] 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_free=0, q_read_ev=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] [L596] __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_free=0, q_read_ev=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] [L598] return (__retres1); [L821] RET, EXPR is_transmit2_triggered() [L821] tmp___1 = is_transmit2_triggered() [L823] COND FALSE !(\read(tmp___1)) [L837] 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_free=0, q_read_ev=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] [L533] 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_free=0, q_read_ev=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] [L534] 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_free=0, q_read_ev=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] [L523] COND TRUE 1 [L525] t2_pc = 1 [L526] t2_st = 2 [L707] RET transmit2() [L663] 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_free=0, q_read_ev=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] [L666] 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_free=0, q_read_ev=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] [L633] int __retres1 ; [L636] COND TRUE m_st == 0 [L637] __retres1 = 1 [L654] return (__retres1); [L666] 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_free=0, q_read_ev=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] [L666] tmp = exists_runnable_thread2() [L668] 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_free=0, q_read_ev=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] [L673] COND TRUE m_st == 0 [L674] int tmp_ndt_1; [L675] tmp_ndt_1 = __VERIFIER_nondet_int() [L676] COND TRUE \read(tmp_ndt_1) [L678] m_st = 1 [L679] CALL master() [L418] int tmp_var = __VERIFIER_nondet_int(); [L420] 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_free=0, q_read_ev=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] [L423] 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_free=0, q_read_ev=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] [L445] COND FALSE !(token != local + 2) [L450] COND TRUE tmp_var <= 5 [L451] 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_free=0, q_read_ev=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] [L456] 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_free=0, q_read_ev=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] [L457] 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_free=0, q_read_ev=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] [L458] 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_free=0, q_read_ev=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] [L459] 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_free=0, q_read_ev=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] [L390] 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_free=0, q_read_ev=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: 27]: 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 11 procedures, 135 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 382.4s, OverallIterations: 32, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 159.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8205 SdHoareTripleChecker+Valid, 14.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8162 mSDsluCounter, 12341 SdHoareTripleChecker+Invalid, 12.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8649 mSDsCounter, 3164 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14272 IncrementalHoareTripleChecker+Invalid, 17436 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3164 mSolverCounterUnsat, 4811 mSDtfsCounter, 14272 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3307 GetRequests, 2492 SyntacticMatches, 63 SemanticMatches, 752 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33542 ImplicationChecksByTransitivity, 267.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4323occurred in iteration=26, InterpolantAutomatonStates: 467, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.2s AutomataMinimizationTime, 31 MinimizatonAttempts, 4723 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 4176 NumberOfCodeBlocks, 4164 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 4589 ConstructedInterpolants, 0 QuantifiedInterpolants, 9655 SizeOfPredicates, 33 NumberOfNonLiveVariables, 7593 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 53 InterpolantComputations, 25 PerfectInterpolantSequences, 2307/2587 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: 44.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 21, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 310, DAG_INTERPRETER_EARLY_EXITS: 9, TOOLS_POST_APPLICATIONS: 331, TOOLS_POST_TIME: 28.6s, TOOLS_POST_CALL_APPLICATIONS: 225, TOOLS_POST_CALL_TIME: 7.5s, TOOLS_POST_RETURN_APPLICATIONS: 186, TOOLS_POST_RETURN_TIME: 4.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 736, TOOLS_QUANTIFIERELIM_TIME: 39.9s, TOOLS_QUANTIFIERELIM_MAX_TIME: 8.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 814, FLUID_YES_ANSWERS: 2, DOMAIN_JOIN_APPLICATIONS: 243, DOMAIN_JOIN_TIME: 3.1s, DOMAIN_ALPHA_APPLICATIONS: 2, DOMAIN_ALPHA_TIME: 0.1s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 310, DOMAIN_ISBOTTOM_TIME: 0.5s, LOOP_SUMMARIZER_APPLICATIONS: 6, LOOP_SUMMARIZER_CACHE_MISSES: 6, LOOP_SUMMARIZER_OVERALL_TIME: 6.6s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 6.6s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 186, CALL_SUMMARIZER_CACHE_MISSES: 18, CALL_SUMMARIZER_OVERALL_TIME: 0.4s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.4s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.3s, DAG_COMPRESSION_PROCESSED_NODES: 25637, DAG_COMPRESSION_RETAINED_NODES: 906, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 02:23:13,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df6544b5-15b1-49d2-a53b-8d8c36c1f946/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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