./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 d8e8f57de68bd156f96d4553940231369dc2e0f8c550ee7a61d6446a6f476745 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:47:36,998 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:47:37,107 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:47:37,112 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:47:37,113 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:47:37,140 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:47:37,141 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:47:37,142 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:47:37,142 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:47:37,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:47:37,144 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:47:37,144 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:47:37,145 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:47:37,146 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:47:37,146 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:47:37,147 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:47:37,147 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:47:37,148 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:47:37,148 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:47:37,149 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:47:37,150 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:47:37,150 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:47:37,151 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:47:37,152 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:47:37,152 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:47:37,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:47:37,153 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:47:37,154 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:47:37,155 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:47:37,155 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:47:37,156 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:47:37,156 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:47:37,157 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:47:37,157 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:47:37,158 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:47:37,159 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:47:37,159 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:47:37,160 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:47:37,160 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:47:37,161 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:47:37,161 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:47:37,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:47:37,163 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:47:37,163 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:47:37,164 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:47:37,164 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8e8f57de68bd156f96d4553940231369dc2e0f8c550ee7a61d6446a6f476745 [2023-11-19 04:47:37,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:47:37,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:47:37,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:47:37,475 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:47:37,475 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:47:37,478 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c [2023-11-19 04:47:40,861 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:47:41,147 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:47:41,147 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c [2023-11-19 04:47:41,163 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/data/adabbc1cc/5815f4b0494e4c7c8dee89210471d088/FLAG69f84a55f [2023-11-19 04:47:41,179 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/data/adabbc1cc/5815f4b0494e4c7c8dee89210471d088 [2023-11-19 04:47:41,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:47:41,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:47:41,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:47:41,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:47:41,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:47:41,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395e1057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41, skipping insertion in model container [2023-11-19 04:47:41,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,253 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:47:41,491 WARN L240 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_28296140-e4ac-4cbd-9853-16ec01625307/sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c[12672,12685] [2023-11-19 04:47:41,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:47:41,545 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:47:41,556 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [49] [2023-11-19 04:47:41,558 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [415] [2023-11-19 04:47:41,559 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [521] [2023-11-19 04:47:41,559 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [530] [2023-11-19 04:47:41,559 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [571] [2023-11-19 04:47:41,560 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [679] [2023-11-19 04:47:41,560 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [714] [2023-11-19 04:47:41,560 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [782] [2023-11-19 04:47:41,611 WARN L240 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_28296140-e4ac-4cbd-9853-16ec01625307/sv-benchmarks/c/product-lines/minepump_spec2_product62.cil.c[12672,12685] [2023-11-19 04:47:41,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:47:41,663 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:47:41,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41 WrapperNode [2023-11-19 04:47:41,664 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:47:41,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:47:41,666 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:47:41,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:47:41,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,691 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,723 INFO L138 Inliner]: procedures = 59, calls = 106, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 226 [2023-11-19 04:47:41,724 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:47:41,725 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:47:41,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:47:41,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:47:41,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,743 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,743 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,750 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,756 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,758 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,760 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,763 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:47:41,764 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:47:41,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:47:41,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:47:41,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (1/1) ... [2023-11-19 04:47:41,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:47:41,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:41,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:47:41,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:47:41,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:47:41,845 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 04:47:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 04:47:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-11-19 04:47:41,846 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-11-19 04:47:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:47:41,846 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:47:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:47:41,846 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:47:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:47:41,847 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 04:47:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 04:47:41,847 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 04:47:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 04:47:41,847 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2023-11-19 04:47:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2023-11-19 04:47:41,848 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2023-11-19 04:47:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-19 04:47:41,848 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-19 04:47:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:47:41,850 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 04:47:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 04:47:41,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:47:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:47:41,944 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:47:41,946 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:47:42,256 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:47:42,471 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:47:42,471 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:47:42,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:47:42 BoogieIcfgContainer [2023-11-19 04:47:42,486 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:47:42,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:47:42,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:47:42,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:47:42,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:47:41" (1/3) ... [2023-11-19 04:47:42,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25991a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:47:42, skipping insertion in model container [2023-11-19 04:47:42,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:41" (2/3) ... [2023-11-19 04:47:42,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25991a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:47:42, skipping insertion in model container [2023-11-19 04:47:42,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:47:42" (3/3) ... [2023-11-19 04:47:42,499 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec2_product62.cil.c [2023-11-19 04:47:42,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:47:42,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:47:42,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:47:42,580 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=LoopHeads, 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;@7b0b82b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:47:42,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:47:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 45 states have (on average 1.4) internal successors, (63), 55 states have internal predecessors, (63), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-19 04:47:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:47:42,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:42,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:42,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:42,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash -399484885, now seen corresponding path program 1 times [2023-11-19 04:47:42,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:42,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883387826] [2023-11-19 04:47:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:42,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:47:42,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:42,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883387826] [2023-11-19 04:47:42,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883387826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:42,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:42,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:47:42,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22322517] [2023-11-19 04:47:42,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:42,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:47:42,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:47:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:47:42,937 INFO L87 Difference]: Start difference. First operand has 75 states, 45 states have (on average 1.4) internal successors, (63), 55 states have internal predecessors, (63), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:47:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:43,044 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2023-11-19 04:47:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:47:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-19 04:47:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:43,056 INFO L225 Difference]: With dead ends: 148 [2023-11-19 04:47:43,057 INFO L226 Difference]: Without dead ends: 70 [2023-11-19 04:47:43,060 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 [2023-11-19 04:47:43,064 INFO L413 NwaCegarLoop]: 78 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, 78 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:43,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:47:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-19 04:47:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-19 04:47:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 51 states have internal predecessors, (55), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-19 04:47:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2023-11-19 04:47:43,114 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 17 [2023-11-19 04:47:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:43,114 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2023-11-19 04:47:43,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:47:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2023-11-19 04:47:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:47:43,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:43,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:43,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:47:43,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:43,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:43,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2108861199, now seen corresponding path program 1 times [2023-11-19 04:47:43,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:43,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690159899] [2023-11-19 04:47:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:43,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:47:43,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:43,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690159899] [2023-11-19 04:47:43,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690159899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:43,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:43,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:47:43,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530870506] [2023-11-19 04:47:43,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:43,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:47:43,218 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:47:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:43,266 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2023-11-19 04:47:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:43,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-19 04:47:43,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:43,269 INFO L225 Difference]: With dead ends: 117 [2023-11-19 04:47:43,269 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 04:47:43,270 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 [2023-11-19 04:47:43,272 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:43,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 119 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:47:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 04:47:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-19 04:47:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 46 states have internal predecessors, (49), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 04:47:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-11-19 04:47:43,285 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 18 [2023-11-19 04:47:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:43,286 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-11-19 04:47:43,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:47:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-11-19 04:47:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 04:47:43,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:43,288 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] [2023-11-19 04:47:43,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:47:43,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:43,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:43,289 INFO L85 PathProgramCache]: Analyzing trace with hash -456880455, now seen corresponding path program 1 times [2023-11-19 04:47:43,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:43,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106528521] [2023-11-19 04:47:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:43,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:47:43,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106528521] [2023-11-19 04:47:43,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106528521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:43,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:43,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:47:43,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368152322] [2023-11-19 04:47:43,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:43,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:47:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:47:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:47:43,608 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:47:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:43,806 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2023-11-19 04:47:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:47:43,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-19 04:47:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:43,808 INFO L225 Difference]: With dead ends: 122 [2023-11-19 04:47:43,808 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 04:47:43,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:47:43,811 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 74 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:43,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 85 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:47:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 04:47:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-19 04:47:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 46 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 04:47:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2023-11-19 04:47:43,825 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 20 [2023-11-19 04:47:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:43,825 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2023-11-19 04:47:43,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:47:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2023-11-19 04:47:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:47:43,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:43,830 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] [2023-11-19 04:47:43,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:47:43,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:43,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1709930653, now seen corresponding path program 1 times [2023-11-19 04:47:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:43,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855404263] [2023-11-19 04:47:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:43,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:47:44,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:44,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855404263] [2023-11-19 04:47:44,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855404263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:44,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:44,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:47:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303245112] [2023-11-19 04:47:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:47:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:47:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:47:44,015 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:47:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:44,247 INFO L93 Difference]: Finished difference Result 195 states and 244 transitions. [2023-11-19 04:47:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:47:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-11-19 04:47:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:44,250 INFO L225 Difference]: With dead ends: 195 [2023-11-19 04:47:44,250 INFO L226 Difference]: Without dead ends: 135 [2023-11-19 04:47:44,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:47:44,253 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 134 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:44,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 180 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:47:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-19 04:47:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2023-11-19 04:47:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 91 states have internal predecessors, (103), 22 states have call successors, (22), 18 states have call predecessors, (22), 23 states have return successors, (29), 24 states have call predecessors, (29), 22 states have call successors, (29) [2023-11-19 04:47:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2023-11-19 04:47:44,284 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 31 [2023-11-19 04:47:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:44,285 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2023-11-19 04:47:44,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:47:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2023-11-19 04:47:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 04:47:44,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:44,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:44,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:47:44,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:44,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash 652646652, now seen corresponding path program 1 times [2023-11-19 04:47:44,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:44,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621787800] [2023-11-19 04:47:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:44,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:47:44,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:44,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621787800] [2023-11-19 04:47:44,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621787800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:44,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:44,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:47:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001551707] [2023-11-19 04:47:44,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:44,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:47:44,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:47:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:44,379 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 04:47:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:44,560 INFO L93 Difference]: Finished difference Result 375 states and 451 transitions. [2023-11-19 04:47:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:47:44,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-11-19 04:47:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:44,564 INFO L225 Difference]: With dead ends: 375 [2023-11-19 04:47:44,565 INFO L226 Difference]: Without dead ends: 248 [2023-11-19 04:47:44,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:47:44,567 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 54 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:44,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 273 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:47:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-19 04:47:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2023-11-19 04:47:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 153 states have (on average 1.1830065359477124) internal successors, (181), 166 states have internal predecessors, (181), 42 states have call successors, (42), 34 states have call predecessors, (42), 44 states have return successors, (56), 46 states have call predecessors, (56), 42 states have call successors, (56) [2023-11-19 04:47:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 279 transitions. [2023-11-19 04:47:44,622 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 279 transitions. Word has length 36 [2023-11-19 04:47:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:44,631 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 279 transitions. [2023-11-19 04:47:44,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 04:47:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 279 transitions. [2023-11-19 04:47:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 04:47:44,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:44,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:44,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:47:44,638 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:44,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:44,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1055750878, now seen corresponding path program 1 times [2023-11-19 04:47:44,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:44,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957959880] [2023-11-19 04:47:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:44,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:47:44,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957959880] [2023-11-19 04:47:44,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957959880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:44,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:44,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:47:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547583784] [2023-11-19 04:47:44,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:44,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:44,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:47:44,759 INFO L87 Difference]: Start difference. First operand 240 states and 279 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:47:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:44,864 INFO L93 Difference]: Finished difference Result 367 states and 443 transitions. [2023-11-19 04:47:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:44,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-19 04:47:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:44,871 INFO L225 Difference]: With dead ends: 367 [2023-11-19 04:47:44,871 INFO L226 Difference]: Without dead ends: 365 [2023-11-19 04:47:44,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:47:44,876 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 54 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:44,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 121 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:47:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-11-19 04:47:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2023-11-19 04:47:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 233 states have (on average 1.1888412017167382) internal successors, (277), 253 states have internal predecessors, (277), 64 states have call successors, (64), 52 states have call predecessors, (64), 67 states have return successors, (97), 70 states have call predecessors, (97), 64 states have call successors, (97) [2023-11-19 04:47:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 438 transitions. [2023-11-19 04:47:44,968 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 438 transitions. Word has length 39 [2023-11-19 04:47:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:44,970 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 438 transitions. [2023-11-19 04:47:44,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:47:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 438 transitions. [2023-11-19 04:47:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 04:47:44,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:44,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:44,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:47:44,978 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:44,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:44,978 INFO L85 PathProgramCache]: Analyzing trace with hash 236316658, now seen corresponding path program 1 times [2023-11-19 04:47:44,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:44,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004443867] [2023-11-19 04:47:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:44,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:47:45,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:45,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004443867] [2023-11-19 04:47:45,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004443867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:45,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56909552] [2023-11-19 04:47:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:45,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:45,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:45,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:47:45,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:47:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:45,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:47:45,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:47:45,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:47:45,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56909552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:45,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:47:45,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-11-19 04:47:45,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31092510] [2023-11-19 04:47:45,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:45,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:47:45,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:45,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:47:45,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:47:45,487 INFO L87 Difference]: Start difference. First operand 365 states and 438 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 04:47:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:45,614 INFO L93 Difference]: Finished difference Result 597 states and 723 transitions. [2023-11-19 04:47:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:47:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 74 [2023-11-19 04:47:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:45,618 INFO L225 Difference]: With dead ends: 597 [2023-11-19 04:47:45,619 INFO L226 Difference]: Without dead ends: 345 [2023-11-19 04:47:45,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:47:45,621 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 40 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:45,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 178 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:47:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-19 04:47:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 335. [2023-11-19 04:47:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 210 states have (on average 1.161904761904762) internal successors, (244), 229 states have internal predecessors, (244), 61 states have call successors, (61), 49 states have call predecessors, (61), 63 states have return successors, (86), 65 states have call predecessors, (86), 61 states have call successors, (86) [2023-11-19 04:47:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 391 transitions. [2023-11-19 04:47:45,672 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 391 transitions. Word has length 74 [2023-11-19 04:47:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:45,672 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 391 transitions. [2023-11-19 04:47:45,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 04:47:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 391 transitions. [2023-11-19 04:47:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-19 04:47:45,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:45,675 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:45,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:47:45,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 04:47:45,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:45,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1035438264, now seen corresponding path program 1 times [2023-11-19 04:47:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:45,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137311552] [2023-11-19 04:47:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 04:47:46,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137311552] [2023-11-19 04:47:46,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137311552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394471401] [2023-11-19 04:47:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:46,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:46,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:46,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:47:46,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:47:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:46,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 04:47:46,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:47:47,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:47:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 04:47:47,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394471401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:47:47,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414721431] [2023-11-19 04:47:47,626 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2023-11-19 04:47:47,626 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:47:47,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:47:47,636 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:47:47,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:47:52,166 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 29 for LOIs [2023-11-19 04:47:52,466 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 25 for LOIs [2023-11-19 04:47:52,525 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 25 for LOIs [2023-11-19 04:47:52,662 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 24 for LOIs [2023-11-19 04:47:52,701 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 43 for LOIs [2023-11-19 04:47:52,737 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 161 for LOIs [2023-11-19 04:47:53,103 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:03,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5162#(and (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~4#1| 0)) (<= 1 |#StackHeapBarrier|) (<= ~methaneLevelCritical~0 1) (= ~head~0.offset 0) (<= 2 ~waterLevel~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~0#1|) (= 1 ~systemActive~0) (= |old(~pumpRunning~0)| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (<= 0 ~methAndRunningLastTime~0) (<= 0 ~methaneLevelCritical~0) (= |old(~waterLevel~0)| ~waterLevel~0) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~4#1| ~methaneLevelCritical~0) (= ~head~0.base 0) (= |old(~methAndRunningLastTime~0)| ~methAndRunningLastTime~0) (exists ((|v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret43#1_42| Int)) (and (= |v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret43#1_42| 0) (= ~pumpRunning~0 1))) (not (= ~methAndRunningLastTime~0 0)) (= ~cleanupTimeShifts~0 4))' at error location [2023-11-19 04:48:03,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:03,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:03,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 23 [2023-11-19 04:48:03,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304183032] [2023-11-19 04:48:03,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:03,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 04:48:03,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 04:48:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2023-11-19 04:48:03,431 INFO L87 Difference]: Start difference. First operand 335 states and 391 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 22 states have internal predecessors, (120), 13 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 12 states have call predecessors, (28), 13 states have call successors, (28) [2023-11-19 04:48:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:05,057 INFO L93 Difference]: Finished difference Result 810 states and 963 transitions. [2023-11-19 04:48:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 04:48:05,058 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 22 states have internal predecessors, (120), 13 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 12 states have call predecessors, (28), 13 states have call successors, (28) Word has length 84 [2023-11-19 04:48:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:05,062 INFO L225 Difference]: With dead ends: 810 [2023-11-19 04:48:05,062 INFO L226 Difference]: Without dead ends: 477 [2023-11-19 04:48:05,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 215 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=810, Invalid=5352, Unknown=0, NotChecked=0, Total=6162 [2023-11-19 04:48:05,068 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 585 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:05,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 283 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:48:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-11-19 04:48:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 403. [2023-11-19 04:48:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 256 states have (on average 1.15234375) internal successors, (295), 276 states have internal predecessors, (295), 70 states have call successors, (70), 62 states have call predecessors, (70), 76 states have return successors, (95), 74 states have call predecessors, (95), 70 states have call successors, (95) [2023-11-19 04:48:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 460 transitions. [2023-11-19 04:48:05,122 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 460 transitions. Word has length 84 [2023-11-19 04:48:05,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:05,122 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 460 transitions. [2023-11-19 04:48:05,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 22 states have internal predecessors, (120), 13 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 12 states have call predecessors, (28), 13 states have call successors, (28) [2023-11-19 04:48:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 460 transitions. [2023-11-19 04:48:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 04:48:05,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:05,126 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:05,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:05,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:05,347 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:05,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1490405792, now seen corresponding path program 1 times [2023-11-19 04:48:05,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:05,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763513980] [2023-11-19 04:48:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:05,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:48:05,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763513980] [2023-11-19 04:48:05,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763513980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:05,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280398500] [2023-11-19 04:48:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:05,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:05,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:05,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:05,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:48:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:05,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-19 04:48:05,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:06,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:48:07,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280398500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:07,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814574707] [2023-11-19 04:48:07,420 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-19 04:48:07,420 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:07,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:07,421 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:07,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:09,503 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 32 for LOIs [2023-11-19 04:48:09,508 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 35 for LOIs [2023-11-19 04:48:09,788 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 32 for LOIs [2023-11-19 04:48:09,847 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 32 for LOIs [2023-11-19 04:48:09,943 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 33 for LOIs [2023-11-19 04:48:09,987 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 52 for LOIs [2023-11-19 04:48:10,009 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 27 for LOIs [2023-11-19 04:48:10,014 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:14,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7447#(and (not (= |timeShift___utac_acc__Specification2_spec__2_~tmp~4#1| 0)) (<= 2 ~waterLevel~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification2_spec__2_~tmp___0~0#1|) (exists ((|v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret43#1_85| Int)) (and (= |v_processEnvironment__wrappee__highWaterSensor_activatePump_#t~ret43#1_85| 0) (= ~pumpRunning~0 1))) (= |old(~pumpRunning~0)| 0) (= |timeShift_isPumpRunning_#res#1| ~pumpRunning~0) (<= 0 ~methAndRunningLastTime~0) (<= 0 ~methaneLevelCritical~0) (= |old(~waterLevel~0)| ~waterLevel~0) (= |timeShift___utac_acc__Specification2_spec__2_~tmp~4#1| ~methaneLevelCritical~0) (= |old(~methAndRunningLastTime~0)| ~methAndRunningLastTime~0) (<= ~methaneLevelCritical~0 2147483647) (exists ((|v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_28| Int)) (and (<= 0 (+ |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_28| 2147483648)) (<= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_28| 2147483647) (or (and (not (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_28| 0)) (= 1 ~systemActive~0)) (and (<= 0 (+ |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_9| 2147483648)) (<= |v_ULTIMATE.start_test_~tmp___1~0#1_BEFORE_CALL_9| 2147483647) (= |v_ULTIMATE.start_test_~tmp___2~0#1_BEFORE_CALL_28| 0))))) (not (= ~methAndRunningLastTime~0 0)) (not (= 0 ~systemActive~0)))' at error location [2023-11-19 04:48:14,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:14,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:14,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 38 [2023-11-19 04:48:14,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16023563] [2023-11-19 04:48:14,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:14,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-19 04:48:14,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-19 04:48:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=5086, Unknown=0, NotChecked=0, Total=5550 [2023-11-19 04:48:14,858 INFO L87 Difference]: Start difference. First operand 403 states and 460 transitions. Second operand has 38 states, 27 states have (on average 5.148148148148148) internal successors, (139), 28 states have internal predecessors, (139), 12 states have call successors, (31), 8 states have call predecessors, (31), 18 states have return successors, (35), 19 states have call predecessors, (35), 12 states have call successors, (35) [2023-11-19 04:48:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:20,554 INFO L93 Difference]: Finished difference Result 1069 states and 1437 transitions. [2023-11-19 04:48:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-19 04:48:20,555 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 27 states have (on average 5.148148148148148) internal successors, (139), 28 states have internal predecessors, (139), 12 states have call successors, (31), 8 states have call predecessors, (31), 18 states have return successors, (35), 19 states have call predecessors, (35), 12 states have call successors, (35) Word has length 87 [2023-11-19 04:48:20,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:20,563 INFO L225 Difference]: With dead ends: 1069 [2023-11-19 04:48:20,563 INFO L226 Difference]: Without dead ends: 851 [2023-11-19 04:48:20,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7603 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2259, Invalid=19793, Unknown=0, NotChecked=0, Total=22052 [2023-11-19 04:48:20,575 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1281 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 3492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:20,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 516 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2572 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 04:48:20,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2023-11-19 04:48:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 580. [2023-11-19 04:48:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 371 states have (on average 1.150943396226415) internal successors, (427), 399 states have internal predecessors, (427), 102 states have call successors, (102), 91 states have call predecessors, (102), 106 states have return successors, (132), 107 states have call predecessors, (132), 102 states have call successors, (132) [2023-11-19 04:48:20,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 661 transitions. [2023-11-19 04:48:20,669 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 661 transitions. Word has length 87 [2023-11-19 04:48:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:20,671 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 661 transitions. [2023-11-19 04:48:20,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 27 states have (on average 5.148148148148148) internal successors, (139), 28 states have internal predecessors, (139), 12 states have call successors, (31), 8 states have call predecessors, (31), 18 states have return successors, (35), 19 states have call predecessors, (35), 12 states have call successors, (35) [2023-11-19 04:48:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 661 transitions. [2023-11-19 04:48:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-19 04:48:20,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:20,680 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-19 04:48:20,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:20,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:20,905 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:20,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:20,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1949174820, now seen corresponding path program 1 times [2023-11-19 04:48:20,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:20,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885944400] [2023-11-19 04:48:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:20,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-19 04:48:21,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:21,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885944400] [2023-11-19 04:48:21,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885944400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:21,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024630093] [2023-11-19 04:48:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:21,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:21,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:21,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:21,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28296140-e4ac-4cbd-9853-16ec01625307/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:48:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:21,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 04:48:21,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 93 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 04:48:21,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 48 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-19 04:48:22,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024630093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:22,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946958815] [2023-11-19 04:48:22,516 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2023-11-19 04:48:22,516 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:22,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:22,517 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:22,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:24,560 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 17 for LOIs [2023-11-19 04:48:24,563 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 33 for LOIs [2023-11-19 04:48:24,905 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 3 for LOIs [2023-11-19 04:48:24,948 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 17 for LOIs [2023-11-19 04:48:25,043 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 35 for LOIs [2023-11-19 04:48:25,118 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 3 for LOIs [2023-11-19 04:48:25,119 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 32 for LOIs [2023-11-19 04:48:25,128 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 9 for LOIs [2023-11-19 04:48:25,129 INFO L180 IcfgInterpreter]: Interpretation finished