./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW --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 3a211ea3558de7a91964968ab789e94c34171c05a0686de6a2a53ff72a198e9d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:53:07,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:53:07,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:53:07,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:53:07,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:53:07,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:53:07,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:53:07,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:53:07,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:53:07,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:53:07,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:53:07,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:53:07,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:53:07,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:53:07,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:53:07,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:53:07,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:53:07,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:53:07,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:53:07,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:53:07,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:53:07,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:53:07,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:53:07,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:53:07,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:53:07,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:53:07,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:53:07,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:53:07,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:53:07,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:53:07,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:53:07,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:53:07,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:53:07,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:53:07,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:53:07,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:53:07,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:53:07,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:53:07,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:53:07,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:53:07,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:53:07,700 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:53:07,738 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:53:07,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:53:07,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:53:07,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:53:07,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:53:07,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:53:07,745 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:53:07,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:53:07,745 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:53:07,746 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:53:07,747 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:53:07,747 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:53:07,747 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:53:07,748 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:53:07,748 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:53:07,748 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:53:07,748 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:53:07,749 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:53:07,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:53:07,750 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:53:07,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:53:07,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:53:07,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:53:07,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:53:07,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:53:07,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:53:07,752 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:53:07,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:53:07,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:53:07,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:53:07,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:53:07,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:53:07,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:53:07,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:53:07,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:53:07,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:53:07,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:53:07,755 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:53:07,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:53:07,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:53:07,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:53:07,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a211ea3558de7a91964968ab789e94c34171c05a0686de6a2a53ff72a198e9d [2022-11-23 15:53:08,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:53:08,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:53:08,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:53:08,142 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:53:08,143 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:53:08,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c [2022-11-23 15:53:11,350 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:53:11,652 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:53:11,652 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c [2022-11-23 15:53:11,675 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/data/cd29a4d9d/86ef3eabf00d4117bca70240a4d3c8d5/FLAG2d2d0dde8 [2022-11-23 15:53:11,695 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/data/cd29a4d9d/86ef3eabf00d4117bca70240a4d3c8d5 [2022-11-23 15:53:11,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:53:11,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:53:11,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:53:11,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:53:11,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:53:11,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:53:11" (1/1) ... [2022-11-23 15:53:11,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c61b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:11, skipping insertion in model container [2022-11-23 15:53:11,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:53:11" (1/1) ... [2022-11-23 15:53:11,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:53:11,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:53:12,074 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c[11718,11731] [2022-11-23 15:53:12,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:53:12,127 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:53:12,232 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/sv-benchmarks/c/product-lines/minepump_spec4_product48.cil.c[11718,11731] [2022-11-23 15:53:12,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:53:12,289 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:53:12,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12 WrapperNode [2022-11-23 15:53:12,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:53:12,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:53:12,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:53:12,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:53:12,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,364 INFO L138 Inliner]: procedures = 56, calls = 102, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 209 [2022-11-23 15:53:12,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:53:12,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:53:12,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:53:12,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:53:12,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,394 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:53:12,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:53:12,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:53:12,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:53:12,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (1/1) ... [2022-11-23 15:53:12,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:53:12,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:53:12,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:53:12,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:53:12,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:53:12,517 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-23 15:53:12,517 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-23 15:53:12,517 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 15:53:12,517 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 15:53:12,518 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 15:53:12,518 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 15:53:12,518 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-23 15:53:12,519 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-23 15:53:12,519 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2022-11-23 15:53:12,519 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2022-11-23 15:53:12,519 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-11-23 15:53:12,520 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-11-23 15:53:12,520 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-11-23 15:53:12,520 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-11-23 15:53:12,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:53:12,521 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-23 15:53:12,521 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-23 15:53:12,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:53:12,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:53:12,651 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:53:12,654 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:53:13,024 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:53:13,204 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:53:13,208 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:53:13,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:53:13 BoogieIcfgContainer [2022-11-23 15:53:13,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:53:13,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:53:13,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:53:13,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:53:13,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:53:11" (1/3) ... [2022-11-23 15:53:13,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9dbaa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:53:13, skipping insertion in model container [2022-11-23 15:53:13,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:12" (2/3) ... [2022-11-23 15:53:13,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9dbaa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:53:13, skipping insertion in model container [2022-11-23 15:53:13,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:53:13" (3/3) ... [2022-11-23 15:53:13,227 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product48.cil.c [2022-11-23 15:53:13,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:53:13,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:53:13,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:53:13,317 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e110394, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:53:13,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:53:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 50 states have internal predecessors, (59), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 15:53:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:53:13,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:13,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:13,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:13,341 INFO L85 PathProgramCache]: Analyzing trace with hash -583362202, now seen corresponding path program 1 times [2022-11-23 15:53:13,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:13,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071817634] [2022-11-23 15:53:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:13,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:53:13,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:13,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071817634] [2022-11-23 15:53:13,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071817634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:13,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:53:13,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:53:13,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837877538] [2022-11-23 15:53:13,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:13,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:53:13,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:53:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:53:13,671 INFO L87 Difference]: Start difference. First operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 50 states have internal predecessors, (59), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:53:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:13,753 INFO L93 Difference]: Finished difference Result 128 states and 175 transitions. [2022-11-23 15:53:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:53:13,756 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 15:53:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:13,777 INFO L225 Difference]: With dead ends: 128 [2022-11-23 15:53:13,777 INFO L226 Difference]: Without dead ends: 60 [2022-11-23 15:53:13,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:53:13,784 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:13,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:53:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-23 15:53:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-23 15:53:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 46 states have internal predecessors, (51), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 15:53:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2022-11-23 15:53:13,852 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 12 [2022-11-23 15:53:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:13,853 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2022-11-23 15:53:13,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:53:13,854 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2022-11-23 15:53:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 15:53:13,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:13,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:13,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:53:13,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1060668930, now seen corresponding path program 1 times [2022-11-23 15:53:13,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:13,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598639649] [2022-11-23 15:53:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:13,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:53:13,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:13,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598639649] [2022-11-23 15:53:13,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598639649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:13,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:53:13,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:53:13,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801700401] [2022-11-23 15:53:13,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:13,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:53:13,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:53:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:53:13,968 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:53:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:14,022 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2022-11-23 15:53:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:53:14,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 15:53:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:14,024 INFO L225 Difference]: With dead ends: 92 [2022-11-23 15:53:14,025 INFO L226 Difference]: Without dead ends: 52 [2022-11-23 15:53:14,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:53:14,027 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:14,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:53:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-23 15:53:14,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-23 15:53:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 41 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 15:53:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-11-23 15:53:14,039 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 13 [2022-11-23 15:53:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:14,039 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-11-23 15:53:14,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:53:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-11-23 15:53:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:53:14,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:14,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:14,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:53:14,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:14,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1845031394, now seen corresponding path program 1 times [2022-11-23 15:53:14,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:14,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600994144] [2022-11-23 15:53:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:14,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:53:14,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:14,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600994144] [2022-11-23 15:53:14,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600994144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:14,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:53:14,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:53:14,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214989758] [2022-11-23 15:53:14,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:14,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:53:14,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:14,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:53:14,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:53:14,188 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:53:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:14,327 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2022-11-23 15:53:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:53:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 15:53:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:14,330 INFO L225 Difference]: With dead ends: 152 [2022-11-23 15:53:14,332 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 15:53:14,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:53:14,336 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 61 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:14,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 116 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:53:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 15:53:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2022-11-23 15:53:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 77 states have internal predecessors, (85), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (22), 15 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 15:53:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2022-11-23 15:53:14,365 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 16 [2022-11-23 15:53:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:14,366 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2022-11-23 15:53:14,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:53:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2022-11-23 15:53:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 15:53:14,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:14,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:14,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:53:14,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:14,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash -126806935, now seen corresponding path program 1 times [2022-11-23 15:53:14,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:14,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441000694] [2022-11-23 15:53:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:14,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:53:14,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:14,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441000694] [2022-11-23 15:53:14,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441000694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:14,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:53:14,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:53:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489663550] [2022-11-23 15:53:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:53:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:53:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:53:14,615 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:53:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:14,782 INFO L93 Difference]: Finished difference Result 270 states and 361 transitions. [2022-11-23 15:53:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:53:14,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 15:53:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:14,797 INFO L225 Difference]: With dead ends: 270 [2022-11-23 15:53:14,798 INFO L226 Difference]: Without dead ends: 173 [2022-11-23 15:53:14,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:53:14,800 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 38 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:14,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 154 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:53:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-23 15:53:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 164. [2022-11-23 15:53:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 109 states have (on average 1.311926605504587) internal successors, (143), 124 states have internal predecessors, (143), 28 states have call successors, (28), 26 states have call predecessors, (28), 26 states have return successors, (36), 25 states have call predecessors, (36), 28 states have call successors, (36) [2022-11-23 15:53:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 207 transitions. [2022-11-23 15:53:14,856 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 207 transitions. Word has length 19 [2022-11-23 15:53:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:14,856 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 207 transitions. [2022-11-23 15:53:14,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:53:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 207 transitions. [2022-11-23 15:53:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:53:14,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:14,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:14,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:53:14,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1717371660, now seen corresponding path program 1 times [2022-11-23 15:53:14,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:14,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958581550] [2022-11-23 15:53:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:14,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:53:15,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:15,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958581550] [2022-11-23 15:53:15,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958581550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:15,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:53:15,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:53:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179343041] [2022-11-23 15:53:15,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:15,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:53:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:53:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:53:15,150 INFO L87 Difference]: Start difference. First operand 164 states and 207 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 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) [2022-11-23 15:53:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:15,400 INFO L93 Difference]: Finished difference Result 476 states and 605 transitions. [2022-11-23 15:53:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:53:15,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 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 [2022-11-23 15:53:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:15,405 INFO L225 Difference]: With dead ends: 476 [2022-11-23 15:53:15,405 INFO L226 Difference]: Without dead ends: 314 [2022-11-23 15:53:15,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:53:15,408 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 73 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:15,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 219 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:53:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-23 15:53:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 278. [2022-11-23 15:53:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 189 states have (on average 1.2857142857142858) internal successors, (243), 211 states have internal predecessors, (243), 43 states have call successors, (43), 41 states have call predecessors, (43), 45 states have return successors, (55), 43 states have call predecessors, (55), 43 states have call successors, (55) [2022-11-23 15:53:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 341 transitions. [2022-11-23 15:53:15,527 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 341 transitions. Word has length 28 [2022-11-23 15:53:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:15,528 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 341 transitions. [2022-11-23 15:53:15,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 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) [2022-11-23 15:53:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 341 transitions. [2022-11-23 15:53:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 15:53:15,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:15,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:15,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:53:15,533 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:15,533 INFO L85 PathProgramCache]: Analyzing trace with hash 361963800, now seen corresponding path program 1 times [2022-11-23 15:53:15,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:15,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586423236] [2022-11-23 15:53:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:53:15,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:15,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586423236] [2022-11-23 15:53:15,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586423236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:15,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:53:15,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:53:15,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031280318] [2022-11-23 15:53:15,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:15,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:53:15,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:53:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:53:15,844 INFO L87 Difference]: Start difference. First operand 278 states and 341 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:53:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:16,593 INFO L93 Difference]: Finished difference Result 638 states and 817 transitions. [2022-11-23 15:53:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:53:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-11-23 15:53:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:16,607 INFO L225 Difference]: With dead ends: 638 [2022-11-23 15:53:16,609 INFO L226 Difference]: Without dead ends: 476 [2022-11-23 15:53:16,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:53:16,615 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 197 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:16,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 327 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:53:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-23 15:53:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 442. [2022-11-23 15:53:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 301 states have (on average 1.282392026578073) internal successors, (386), 338 states have internal predecessors, (386), 70 states have call successors, (70), 60 states have call predecessors, (70), 70 states have return successors, (92), 70 states have call predecessors, (92), 70 states have call successors, (92) [2022-11-23 15:53:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 548 transitions. [2022-11-23 15:53:16,732 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 548 transitions. Word has length 31 [2022-11-23 15:53:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:16,732 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 548 transitions. [2022-11-23 15:53:16,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:53:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 548 transitions. [2022-11-23 15:53:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 15:53:16,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:16,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:16,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:53:16,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2101966620, now seen corresponding path program 1 times [2022-11-23 15:53:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:16,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057806668] [2022-11-23 15:53:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:53:16,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:16,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057806668] [2022-11-23 15:53:16,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057806668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:16,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:53:16,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:53:16,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895204333] [2022-11-23 15:53:16,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:16,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:53:16,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:16,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:53:16,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:53:16,847 INFO L87 Difference]: Start difference. First operand 442 states and 548 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:53:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:17,019 INFO L93 Difference]: Finished difference Result 737 states and 916 transitions. [2022-11-23 15:53:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:53:17,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 46 [2022-11-23 15:53:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:17,022 INFO L225 Difference]: With dead ends: 737 [2022-11-23 15:53:17,023 INFO L226 Difference]: Without dead ends: 297 [2022-11-23 15:53:17,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:53:17,032 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 83 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:17,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 110 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:53:17,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-23 15:53:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 291. [2022-11-23 15:53:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 202 states have (on average 1.2673267326732673) internal successors, (256), 227 states have internal predecessors, (256), 44 states have call successors, (44), 39 states have call predecessors, (44), 44 states have return successors, (55), 44 states have call predecessors, (55), 44 states have call successors, (55) [2022-11-23 15:53:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 355 transitions. [2022-11-23 15:53:17,109 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 355 transitions. Word has length 46 [2022-11-23 15:53:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:17,110 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 355 transitions. [2022-11-23 15:53:17,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:53:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 355 transitions. [2022-11-23 15:53:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 15:53:17,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:17,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:17,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:53:17,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:17,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1599477730, now seen corresponding path program 1 times [2022-11-23 15:53:17,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:17,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380125054] [2022-11-23 15:53:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:17,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:53:17,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:17,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380125054] [2022-11-23 15:53:17,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380125054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:53:17,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476776678] [2022-11-23 15:53:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:17,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:17,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:53:17,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:53:17,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:53:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:17,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:53:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:53:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:53:18,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:53:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:53:19,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476776678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:53:19,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1639291680] [2022-11-23 15:53:19,056 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-23 15:53:19,057 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:53:19,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:53:19,068 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:53:19,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:53:22,212 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 48 for LOIs [2022-11-23 15:53:22,223 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 27 for LOIs [2022-11-23 15:53:22,344 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 24 for LOIs [2022-11-23 15:53:22,473 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 26 for LOIs [2022-11-23 15:53:22,476 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:53:27,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1639291680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:27,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:53:27,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [15, 11, 10] total 55 [2022-11-23 15:53:27,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786367772] [2022-11-23 15:53:27,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:27,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:53:27,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:53:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=2534, Unknown=0, NotChecked=0, Total=2970 [2022-11-23 15:53:27,172 INFO L87 Difference]: Start difference. First operand 291 states and 355 transitions. Second operand has 25 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:53:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:36,546 INFO L93 Difference]: Finished difference Result 736 states and 922 transitions. [2022-11-23 15:53:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 15:53:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-11-23 15:53:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:36,550 INFO L225 Difference]: With dead ends: 736 [2022-11-23 15:53:36,551 INFO L226 Difference]: Without dead ends: 496 [2022-11-23 15:53:36,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2174 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1180, Invalid=5792, Unknown=0, NotChecked=0, Total=6972 [2022-11-23 15:53:36,555 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 283 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:36,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 582 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 15:53:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-11-23 15:53:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 458. [2022-11-23 15:53:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 324 states have (on average 1.2654320987654322) internal successors, (410), 355 states have internal predecessors, (410), 67 states have call successors, (67), 57 states have call predecessors, (67), 66 states have return successors, (91), 68 states have call predecessors, (91), 67 states have call successors, (91) [2022-11-23 15:53:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 568 transitions. [2022-11-23 15:53:36,633 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 568 transitions. Word has length 57 [2022-11-23 15:53:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:36,634 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 568 transitions. [2022-11-23 15:53:36,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:53:36,634 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 568 transitions. [2022-11-23 15:53:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 15:53:36,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:36,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:36,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:53:36,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:36,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:36,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash -933100690, now seen corresponding path program 1 times [2022-11-23 15:53:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:36,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766507286] [2022-11-23 15:53:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:53:37,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766507286] [2022-11-23 15:53:37,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766507286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:53:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561405777] [2022-11-23 15:53:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:37,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:37,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:53:37,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:53:37,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:53:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 15:53:37,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:53:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:53:37,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:53:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:53:38,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561405777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:53:38,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2072102117] [2022-11-23 15:53:38,505 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-23 15:53:38,505 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:53:38,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:53:38,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:53:38,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:53:40,413 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 29 for LOIs [2022-11-23 15:53:40,540 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 27 for LOIs [2022-11-23 15:53:40,729 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 26 for LOIs [2022-11-23 15:53:40,732 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 46 for LOIs [2022-11-23 15:53:40,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:53:45,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2072102117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:53:45,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:53:45,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [16, 13, 11] total 50 [2022-11-23 15:53:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716150146] [2022-11-23 15:53:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:53:45,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 15:53:45,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:53:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 15:53:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2140, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 15:53:45,179 INFO L87 Difference]: Start difference. First operand 458 states and 568 transitions. Second operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:53:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:53:53,133 INFO L93 Difference]: Finished difference Result 1062 states and 1373 transitions. [2022-11-23 15:53:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 15:53:53,133 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-11-23 15:53:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:53:53,139 INFO L225 Difference]: With dead ends: 1062 [2022-11-23 15:53:53,140 INFO L226 Difference]: Without dead ends: 851 [2022-11-23 15:53:53,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 132 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=776, Invalid=5076, Unknown=0, NotChecked=0, Total=5852 [2022-11-23 15:53:53,143 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 192 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:53:53,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 486 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 15:53:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-11-23 15:53:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 718. [2022-11-23 15:53:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 508 states have (on average 1.25) internal successors, (635), 553 states have internal predecessors, (635), 102 states have call successors, (102), 90 states have call predecessors, (102), 107 states have return successors, (148), 108 states have call predecessors, (148), 102 states have call successors, (148) [2022-11-23 15:53:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 885 transitions. [2022-11-23 15:53:53,271 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 885 transitions. Word has length 57 [2022-11-23 15:53:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:53:53,272 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 885 transitions. [2022-11-23 15:53:53,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:53:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 885 transitions. [2022-11-23 15:53:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 15:53:53,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:53:53,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:53:53,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 15:53:53,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:53,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:53:53,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:53:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash 590563651, now seen corresponding path program 1 times [2022-11-23 15:53:53,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:53:53,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822827714] [2022-11-23 15:53:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:53,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:53:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:53:53,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:53:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822827714] [2022-11-23 15:53:53,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822827714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:53:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211274569] [2022-11-23 15:53:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:53:53,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:53:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:53:53,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:53:53,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:53:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:53:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 15:53:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:53:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:53:54,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:53:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:53:54,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211274569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:53:54,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701061934] [2022-11-23 15:53:54,930 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2022-11-23 15:53:54,931 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:53:54,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:53:54,932 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:53:54,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:53:58,484 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 125 for LOIs [2022-11-23 15:53:58,509 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 26 for LOIs [2022-11-23 15:53:58,752 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 20 for LOIs [2022-11-23 15:53:58,918 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 50 for LOIs [2022-11-23 15:53:58,932 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 23 for LOIs [2022-11-23 15:53:58,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:54:05,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11925#(and (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~5#1|) (= |timeShift_getWaterLevel_~retValue_acc~8#1| ~waterLevel~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| |timeShift_getWaterLevel_#res#1|) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~5#1|) (= 1 ~systemActive~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~8#1| |timeShift_getWaterLevel_#res#1|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-23 15:54:05,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:54:05,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:54:05,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 11] total 28 [2022-11-23 15:54:05,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735100672] [2022-11-23 15:54:05,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:54:05,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 15:54:05,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 15:54:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2721, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 15:54:05,639 INFO L87 Difference]: Start difference. First operand 718 states and 885 transitions. Second operand has 28 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 13 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2022-11-23 15:54:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:08,626 INFO L93 Difference]: Finished difference Result 1629 states and 2086 transitions. [2022-11-23 15:54:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-23 15:54:08,627 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 13 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) Word has length 60 [2022-11-23 15:54:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:08,635 INFO L225 Difference]: With dead ends: 1629 [2022-11-23 15:54:08,636 INFO L226 Difference]: Without dead ends: 1295 [2022-11-23 15:54:08,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4056 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1159, Invalid=7961, Unknown=0, NotChecked=0, Total=9120 [2022-11-23 15:54:08,641 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1048 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:08,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1054 Valid, 669 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 15:54:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2022-11-23 15:54:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1201. [2022-11-23 15:54:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 852 states have (on average 1.233568075117371) internal successors, (1051), 925 states have internal predecessors, (1051), 166 states have call successors, (166), 142 states have call predecessors, (166), 182 states have return successors, (247), 181 states have call predecessors, (247), 166 states have call successors, (247) [2022-11-23 15:54:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1464 transitions. [2022-11-23 15:54:08,902 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1464 transitions. Word has length 60 [2022-11-23 15:54:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:08,902 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1464 transitions. [2022-11-23 15:54:08,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 13 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2022-11-23 15:54:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1464 transitions. [2022-11-23 15:54:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 15:54:08,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:08,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:08,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:54:09,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:54:09,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:09,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1290120179, now seen corresponding path program 1 times [2022-11-23 15:54:09,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:09,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279800932] [2022-11-23 15:54:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:09,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:54:09,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:54:09,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279800932] [2022-11-23 15:54:09,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279800932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:54:09,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998664260] [2022-11-23 15:54:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:09,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:54:09,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:09,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:54:09,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:54:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:54:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 15:54:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:54:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:54:09,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:54:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:54:10,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998664260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:54:10,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40509562] [2022-11-23 15:54:10,208 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2022-11-23 15:54:10,208 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:54:10,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:54:10,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:54:10,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:54:12,446 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 44 for LOIs [2022-11-23 15:54:12,670 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 40 for LOIs [2022-11-23 15:54:12,871 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 47 for LOIs [2022-11-23 15:54:12,880 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 48 for LOIs [2022-11-23 15:54:12,887 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 41 for LOIs [2022-11-23 15:54:12,892 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:54:20,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16789#(and (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~5#1|) (<= ~methaneLevelCritical~0 1) (= |timeShift_getWaterLevel_~retValue_acc~8#1| ~waterLevel~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| |timeShift_getWaterLevel_#res#1|) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= ~head~0.offset 0) (<= 1 ~systemActive~0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~5#1|) (<= |#NULL.offset| 0) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~0#1| 0) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |timeShift_getWaterLevel_~retValue_acc~8#1| |timeShift_getWaterLevel_#res#1|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-23 15:54:20,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:54:20,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:54:20,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 24 [2022-11-23 15:54:20,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098196574] [2022-11-23 15:54:20,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:54:20,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 15:54:20,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:54:20,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 15:54:20,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 15:54:20,349 INFO L87 Difference]: Start difference. First operand 1201 states and 1464 transitions. Second operand has 24 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 11 states have call successors, (22), 8 states have call predecessors, (22), 10 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-23 15:54:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:54:25,860 INFO L93 Difference]: Finished difference Result 3509 states and 4412 transitions. [2022-11-23 15:54:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-23 15:54:25,861 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 11 states have call successors, (22), 8 states have call predecessors, (22), 10 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 60 [2022-11-23 15:54:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:54:25,878 INFO L225 Difference]: With dead ends: 3509 [2022-11-23 15:54:25,878 INFO L226 Difference]: Without dead ends: 2967 [2022-11-23 15:54:25,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 154 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6203 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1438, Invalid=15592, Unknown=0, NotChecked=0, Total=17030 [2022-11-23 15:54:25,887 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1292 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2885 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 3579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 2885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:54:25,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 1052 Invalid, 3579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 2885 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 15:54:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2022-11-23 15:54:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2478. [2022-11-23 15:54:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 1768 states have (on average 1.2330316742081449) internal successors, (2180), 1920 states have internal predecessors, (2180), 355 states have call successors, (355), 278 states have call predecessors, (355), 354 states have return successors, (533), 371 states have call predecessors, (533), 355 states have call successors, (533) [2022-11-23 15:54:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3068 transitions. [2022-11-23 15:54:26,409 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3068 transitions. Word has length 60 [2022-11-23 15:54:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:54:26,409 INFO L495 AbstractCegarLoop]: Abstraction has 2478 states and 3068 transitions. [2022-11-23 15:54:26,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 11 states have call successors, (22), 8 states have call predecessors, (22), 10 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-23 15:54:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3068 transitions. [2022-11-23 15:54:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 15:54:26,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:54:26,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:26,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 15:54:26,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:54:26,625 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:54:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:54:26,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1855654664, now seen corresponding path program 2 times [2022-11-23 15:54:26,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:54:26,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867667479] [2022-11-23 15:54:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:54:26,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:54:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:54:26,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:54:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:54:26,717 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:54:26,720 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:54:26,721 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 15:54:26,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:54:26,739 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:54:26,744 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:54:26,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:54:26 BoogieIcfgContainer [2022-11-23 15:54:26,815 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:54:26,815 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:54:26,815 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:54:26,816 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:54:26,816 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:53:13" (3/4) ... [2022-11-23 15:54:26,819 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-23 15:54:26,961 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 15:54:26,963 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:54:26,964 INFO L158 Benchmark]: Toolchain (without parser) took 75261.61ms. Allocated memory was 146.8MB in the beginning and 545.3MB in the end (delta: 398.5MB). Free memory was 113.2MB in the beginning and 335.9MB in the end (delta: -222.8MB). Peak memory consumption was 176.4MB. Max. memory is 16.1GB. [2022-11-23 15:54:26,964 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory is still 91.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:54:26,965 INFO L158 Benchmark]: CACSL2BoogieTranslator took 584.17ms. Allocated memory is still 146.8MB. Free memory was 113.2MB in the beginning and 109.6MB in the end (delta: 3.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:54:26,966 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.21ms. Allocated memory is still 146.8MB. Free memory was 109.6MB in the beginning and 107.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:54:26,966 INFO L158 Benchmark]: Boogie Preprocessor took 32.12ms. Allocated memory is still 146.8MB. Free memory was 107.6MB in the beginning and 106.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:54:26,967 INFO L158 Benchmark]: RCFGBuilder took 812.20ms. Allocated memory is still 146.8MB. Free memory was 106.1MB in the beginning and 81.8MB in the end (delta: 24.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-23 15:54:26,968 INFO L158 Benchmark]: TraceAbstraction took 73600.75ms. Allocated memory was 146.8MB in the beginning and 545.3MB in the end (delta: 398.5MB). Free memory was 81.2MB in the beginning and 343.4MB in the end (delta: -262.2MB). Peak memory consumption was 138.1MB. Max. memory is 16.1GB. [2022-11-23 15:54:26,969 INFO L158 Benchmark]: Witness Printer took 148.08ms. Allocated memory is still 545.3MB. Free memory was 343.4MB in the beginning and 335.9MB in the end (delta: 7.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-23 15:54:26,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 119.5MB. Free memory is still 91.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 584.17ms. Allocated memory is still 146.8MB. Free memory was 113.2MB in the beginning and 109.6MB in the end (delta: 3.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.21ms. Allocated memory is still 146.8MB. Free memory was 109.6MB in the beginning and 107.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.12ms. Allocated memory is still 146.8MB. Free memory was 107.6MB in the beginning and 106.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 812.20ms. Allocated memory is still 146.8MB. Free memory was 106.1MB in the beginning and 81.8MB in the end (delta: 24.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 73600.75ms. Allocated memory was 146.8MB in the beginning and 545.3MB in the end (delta: 398.5MB). Free memory was 81.2MB in the beginning and 343.4MB in the end (delta: -262.2MB). Peak memory consumption was 138.1MB. Max. memory is 16.1GB. * Witness Printer took 148.08ms. Allocated memory is still 545.3MB. Free memory was 343.4MB in the beginning and 335.9MB in the end (delta: 7.5MB). Peak memory consumption was 8.4MB. 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: 449]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L248] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L454] int cleanupTimeShifts = 4; [L566] int pumpRunning = 0; [L567] int systemActive = 1; [L784] int waterLevel = 1; [L785] int methaneLevelCritical = 0; [L535] int retValue_acc ; [L536] int tmp ; [L540] FCALL select_helpers() [L541] FCALL select_features() [L542] CALL, EXPR valid_product() [L973] int retValue_acc ; [L976] retValue_acc = 1 [L977] return (retValue_acc); [L542] RET, EXPR valid_product() [L542] tmp = valid_product() [L544] COND TRUE \read(tmp) [L546] FCALL setup() [L547] CALL runTest() [L526] CALL test() [L879] int splverifierCounter ; [L880] int tmp ; [L881] int tmp___0 ; [L882] int tmp___1 ; [L883] int tmp___2 ; [L886] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L888] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L890] COND TRUE splverifierCounter < 4 [L896] tmp = __VERIFIER_nondet_int() [L898] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, waterLevel=1] [L900] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L802] COND TRUE waterLevel < 2 [L803] waterLevel = waterLevel + 1 [L900] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, waterLevel=2] [L906] tmp___0 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, waterLevel=2] [L916] tmp___2 = __VERIFIER_nondet_int() [L918] COND TRUE \read(tmp___2) [L920] CALL startSystem() [L779] systemActive = 1 [L920] RET startSystem() [L935] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L573] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L580] COND TRUE \read(systemActive) [L582] CALL processEnvironment() [L628] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L631] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L646] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L602] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L605] COND TRUE ! pumpRunning [L607] CALL, EXPR isHighWaterLevel() [L742] int retValue_acc ; [L743] int tmp ; [L744] int tmp___0 ; [L748] CALL, EXPR isHighWaterSensorDry() [L864] int retValue_acc ; [L867] COND FALSE !(waterLevel < 2) [L871] retValue_acc = 0 [L872] return (retValue_acc); [L748] RET, EXPR isHighWaterSensorDry() [L748] tmp = isHighWaterSensorDry() [L750] COND FALSE !(\read(tmp)) [L753] tmp___0 = 1 [L755] retValue_acc = tmp___0 [L756] return (retValue_acc); [L607] RET, EXPR isHighWaterLevel() [L607] tmp = isHighWaterLevel() [L609] COND TRUE \read(tmp) [L611] CALL activatePump() [L661] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L665] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L686] int retValue_acc ; [L690] CALL, EXPR isMethaneLevelCritical() [L823] int retValue_acc ; [L826] retValue_acc = methaneLevelCritical [L827] return (retValue_acc); [L690] RET, EXPR isMethaneLevelCritical() [L690] retValue_acc = isMethaneLevelCritical() [L692] return (retValue_acc); [L665] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneAlarm()=0, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L665] tmp = isMethaneAlarm() [L667] COND FALSE !(\read(tmp)) [L671] CALL activatePump__wrappee__highWaterSensor() [L656] pumpRunning = 1 [L671] RET activatePump__wrappee__highWaterSensor() [L611] RET activatePump() [L646] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L582] RET processEnvironment() [L588] CALL __utac_acc__Specification4_spec__1() [L54] int tmp ; [L55] int tmp___0 ; [L59] CALL, EXPR getWaterLevel() [L855] int retValue_acc ; [L858] retValue_acc = waterLevel [L859] return (retValue_acc); [L59] RET, EXPR getWaterLevel() [L59] tmp = getWaterLevel() [L61] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=2, waterLevel=2] [L588] RET __utac_acc__Specification4_spec__1() [L935] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, tmp___2=1, waterLevel=2] [L888] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, tmp___2=1, waterLevel=2] [L890] COND TRUE splverifierCounter < 4 [L896] tmp = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=2] [L906] tmp___0 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=2] [L916] tmp___2 = __VERIFIER_nondet_int() [L918] COND TRUE \read(tmp___2) [L920] CALL startSystem() [L779] systemActive = 1 [L920] RET startSystem() [L935] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L573] COND TRUE \read(pumpRunning) [L575] CALL lowerWaterLevel() [L790] COND TRUE waterLevel > 0 [L791] waterLevel = waterLevel - 1 [L575] RET lowerWaterLevel() [L580] COND TRUE \read(systemActive) [L582] CALL processEnvironment() [L628] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L631] COND TRUE \read(pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L633] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L686] int retValue_acc ; [L690] CALL, EXPR isMethaneLevelCritical() [L823] int retValue_acc ; [L826] retValue_acc = methaneLevelCritical [L827] return (retValue_acc); [L690] RET, EXPR isMethaneLevelCritical() [L690] retValue_acc = isMethaneLevelCritical() [L692] return (retValue_acc); [L633] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneAlarm()=0, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L633] tmp = isMethaneAlarm() [L635] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L641] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L602] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L605] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L620] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L641] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L582] RET processEnvironment() [L588] CALL __utac_acc__Specification4_spec__1() [L54] int tmp ; [L55] int tmp___0 ; [L59] CALL, EXPR getWaterLevel() [L855] int retValue_acc ; [L858] retValue_acc = waterLevel [L859] return (retValue_acc); [L59] RET, EXPR getWaterLevel() [L59] tmp = getWaterLevel() [L61] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=1, waterLevel=1] [L588] RET __utac_acc__Specification4_spec__1() [L935] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=1] [L888] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=1] [L890] COND TRUE splverifierCounter < 4 [L896] tmp = __VERIFIER_nondet_int() [L898] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=1] [L906] tmp___0 = __VERIFIER_nondet_int() [L908] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___2=1, waterLevel=1] [L916] tmp___2 = __VERIFIER_nondet_int() [L918] COND TRUE \read(tmp___2) [L920] CALL startSystem() [L779] systemActive = 1 [L920] RET startSystem() [L935] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L573] COND TRUE \read(pumpRunning) [L575] CALL lowerWaterLevel() [L790] COND TRUE waterLevel > 0 [L791] waterLevel = waterLevel - 1 [L575] RET lowerWaterLevel() [L580] COND TRUE \read(systemActive) [L582] CALL processEnvironment() [L628] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L631] COND TRUE \read(pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L633] CALL, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L686] int retValue_acc ; [L690] CALL, EXPR isMethaneLevelCritical() [L823] int retValue_acc ; [L826] retValue_acc = methaneLevelCritical [L827] return (retValue_acc); [L690] RET, EXPR isMethaneLevelCritical() [L690] retValue_acc = isMethaneLevelCritical() [L692] return (retValue_acc); [L633] RET, EXPR isMethaneAlarm() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, isMethaneAlarm()=0, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L633] tmp = isMethaneAlarm() [L635] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L641] CALL processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L602] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L605] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L620] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L641] RET processEnvironment__wrappee__methaneQuery() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L582] RET processEnvironment() [L588] CALL __utac_acc__Specification4_spec__1() [L54] int tmp ; [L55] int tmp___0 ; [L59] CALL, EXPR getWaterLevel() [L855] int retValue_acc ; [L858] retValue_acc = waterLevel [L859] return (retValue_acc); [L59] RET, EXPR getWaterLevel() [L59] tmp = getWaterLevel() [L61] COND TRUE tmp == 0 [L63] CALL, EXPR isPumpRunning() [L697] int retValue_acc ; [L700] retValue_acc = pumpRunning [L701] return (retValue_acc); [L63] RET, EXPR isPumpRunning() [L63] tmp___0 = isPumpRunning() [L65] COND TRUE \read(tmp___0) [L67] CALL __automaton_fail() [L449] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 65 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 73.5s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 27.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3315 SdHoareTripleChecker+Valid, 8.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3281 mSDsluCounter, 3869 SdHoareTripleChecker+Invalid, 7.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3133 mSDsCounter, 1730 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7767 IncrementalHoareTripleChecker+Invalid, 9497 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1730 mSolverCounterUnsat, 736 mSDtfsCounter, 7767 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 997 GetRequests, 565 SyntacticMatches, 30 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14296 ImplicationChecksByTransitivity, 42.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2478occurred in iteration=11, InterpolantAutomatonStates: 247, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 842 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 722 NumberOfCodeBlocks, 722 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 848 ConstructedInterpolants, 0 QuantifiedInterpolants, 3561 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1158 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 19 InterpolantComputations, 7 PerfectInterpolantSequences, 170/277 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: 5.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 10, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 90, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 124, TOOLS_POST_TIME: 2.1s, TOOLS_POST_CALL_APPLICATIONS: 52, TOOLS_POST_CALL_TIME: 1.5s, TOOLS_POST_RETURN_APPLICATIONS: 44, TOOLS_POST_RETURN_TIME: 0.8s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 220, TOOLS_QUANTIFIERELIM_TIME: 4.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 278, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 52, DOMAIN_JOIN_TIME: 0.8s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 90, DOMAIN_ISBOTTOM_TIME: 0.2s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 2.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 2.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 44, CALL_SUMMARIZER_CACHE_MISSES: 8, 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: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 1165, DAG_COMPRESSION_RETAINED_NODES: 234, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-23 15:54:27,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_690395c7-50f1-4914-82b3-c5710d9a715a/bin/utaipan-Q6hlc19bkW/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