./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec3_product53.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_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/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_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec3_product53.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/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_4c440708-a2d3-4302-b87c-dc52d8ab9e27/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 e1c4d106eb612b91999bdca4bb49f57df1223b70f35ecd881d6daa6062cb1b0b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:01:37,673 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:01:37,788 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:01:37,797 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:01:37,798 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:01:37,839 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:01:37,840 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:01:37,840 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:01:37,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:01:37,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:01:37,847 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:01:37,847 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:01:37,848 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:01:37,849 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:01:37,850 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:01:37,850 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:01:37,851 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:01:37,851 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:01:37,852 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:01:37,852 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:01:37,852 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:01:37,853 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:01:37,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:01:37,855 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:01:37,855 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:01:37,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:01:37,856 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:01:37,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:01:37,856 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:01:37,857 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:01:37,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:01:37,858 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:01:37,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:01:37,859 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:01:37,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:01:37,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:01:37,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:01:37,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:01:37,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:01:37,870 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:01:37,870 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:01:37,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:01:37,871 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:01:37,871 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:01:37,872 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:01:37,872 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_4c440708-a2d3-4302-b87c-dc52d8ab9e27/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1c4d106eb612b91999bdca4bb49f57df1223b70f35ecd881d6daa6062cb1b0b [2023-11-19 05:01:38,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:01:38,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:01:38,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:01:38,243 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:01:38,244 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:01:38,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/minepump_spec3_product53.cil.c [2023-11-19 05:01:41,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:01:41,642 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:01:41,643 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/sv-benchmarks/c/product-lines/minepump_spec3_product53.cil.c [2023-11-19 05:01:41,663 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/data/61e3cd3c9/d863245403834345bc524c6719f0b08d/FLAGea7afe6df [2023-11-19 05:01:41,679 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/data/61e3cd3c9/d863245403834345bc524c6719f0b08d [2023-11-19 05:01:41,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:01:41,684 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:01:41,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:01:41,686 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:01:41,699 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:01:41,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:01:41" (1/1) ... [2023-11-19 05:01:41,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb3e3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:41, skipping insertion in model container [2023-11-19 05:01:41,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:01:41" (1/1) ... [2023-11-19 05:01:41,780 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:01:42,004 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_4c440708-a2d3-4302-b87c-dc52d8ab9e27/sv-benchmarks/c/product-lines/minepump_spec3_product53.cil.c[1605,1618] [2023-11-19 05:01:42,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:01:42,205 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:01:42,216 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [49] [2023-11-19 05:01:42,218 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [58] [2023-11-19 05:01:42,219 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [96] [2023-11-19 05:01:42,219 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [165] [2023-11-19 05:01:42,219 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [398] [2023-11-19 05:01:42,220 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [502] [2023-11-19 05:01:42,220 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [536] [2023-11-19 05:01:42,221 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [902] [2023-11-19 05:01:42,225 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_4c440708-a2d3-4302-b87c-dc52d8ab9e27/sv-benchmarks/c/product-lines/minepump_spec3_product53.cil.c[1605,1618] [2023-11-19 05:01:42,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:01:42,312 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:01:42,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42 WrapperNode [2023-11-19 05:01:42,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:01:42,315 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:01:42,315 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:01:42,315 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:01:42,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,358 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,400 INFO L138 Inliner]: procedures = 56, calls = 103, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 228 [2023-11-19 05:01:42,401 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:01:42,402 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:01:42,402 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:01:42,402 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:01:42,412 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,425 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,430 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,436 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,456 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,460 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,463 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:01:42,466 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:01:42,467 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:01:42,467 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:01:42,468 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (1/1) ... [2023-11-19 05:01:42,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:01:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:42,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:01:42,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:01:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:01:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2023-11-19 05:01:42,560 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2023-11-19 05:01:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2023-11-19 05:01:42,560 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2023-11-19 05:01:42,561 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:01:42,561 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:01:42,561 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:01:42,561 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:01:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 05:01:42,562 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2023-11-19 05:01:42,563 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2023-11-19 05:01:42,563 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2023-11-19 05:01:42,564 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-19 05:01:42,564 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2023-11-19 05:01:42,565 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2023-11-19 05:01:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2023-11-19 05:01:42,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:01:42,566 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2023-11-19 05:01:42,567 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2023-11-19 05:01:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:01:42,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:01:42,657 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:01:42,660 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:01:43,050 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:01:43,203 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:01:43,203 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:01:43,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:01:43 BoogieIcfgContainer [2023-11-19 05:01:43,210 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:01:43,214 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:01:43,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:01:43,218 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:01:43,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:01:41" (1/3) ... [2023-11-19 05:01:43,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777e7617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:01:43, skipping insertion in model container [2023-11-19 05:01:43,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:42" (2/3) ... [2023-11-19 05:01:43,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777e7617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:01:43, skipping insertion in model container [2023-11-19 05:01:43,221 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:01:43" (3/3) ... [2023-11-19 05:01:43,223 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec3_product53.cil.c [2023-11-19 05:01:43,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:01:43,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:01:43,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:01:43,379 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;@78b67c31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:01:43,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:01:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 52 states have internal predecessors, (60), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 05:01:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:01:43,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:43,395 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 05:01:43,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:43,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:43,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1512027319, now seen corresponding path program 1 times [2023-11-19 05:01:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:43,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397442517] [2023-11-19 05:01:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:43,589 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 05:01:43,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:43,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397442517] [2023-11-19 05:01:43,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397442517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:43,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:43,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:01:43,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778248730] [2023-11-19 05:01:43,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:43,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:01:43,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:01:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:01:43,635 INFO L87 Difference]: Start difference. First operand has 69 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 52 states have internal predecessors, (60), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) 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 05:01:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:43,712 INFO L93 Difference]: Finished difference Result 136 states and 185 transitions. [2023-11-19 05:01:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:01:43,715 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 05:01:43,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:43,725 INFO L225 Difference]: With dead ends: 136 [2023-11-19 05:01:43,725 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 05:01:43,729 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 05:01:43,734 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:43,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:01:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 05:01:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-19 05:01:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 48 states have internal predecessors, (52), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 05:01:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2023-11-19 05:01:43,785 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 17 [2023-11-19 05:01:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:43,786 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2023-11-19 05:01:43,786 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 05:01:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2023-11-19 05:01:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:01:43,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:43,790 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 05:01:43,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:01:43,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:43,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 963484933, now seen corresponding path program 1 times [2023-11-19 05:01:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:43,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502495735] [2023-11-19 05:01:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:43,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:43,952 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 05:01:43,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:43,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502495735] [2023-11-19 05:01:43,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502495735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:43,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:43,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:01:43,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138626617] [2023-11-19 05:01:43,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:43,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:01:43,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:01:43,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:01:43,962 INFO L87 Difference]: Start difference. First operand 64 states and 83 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 05:01:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:44,047 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2023-11-19 05:01:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:01:44,048 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 05:01:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:44,049 INFO L225 Difference]: With dead ends: 105 [2023-11-19 05:01:44,050 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 05:01:44,051 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 05:01:44,052 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:44,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 05:01:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-19 05:01:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 43 states have internal predecessors, (46), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 05:01:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-11-19 05:01:44,065 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 18 [2023-11-19 05:01:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:44,065 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-11-19 05:01:44,066 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 05:01:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-11-19 05:01:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:01:44,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:44,068 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 05:01:44,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:01:44,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:44,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash -774873844, now seen corresponding path program 1 times [2023-11-19 05:01:44,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:44,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997922460] [2023-11-19 05:01:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:44,174 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 05:01:44,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:44,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997922460] [2023-11-19 05:01:44,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997922460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:44,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:44,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:01:44,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464227195] [2023-11-19 05:01:44,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:44,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:01:44,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:44,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:01:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:01:44,178 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 05:01:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:44,222 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2023-11-19 05:01:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:01:44,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 05:01:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:44,224 INFO L225 Difference]: With dead ends: 110 [2023-11-19 05:01:44,225 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 05:01:44,226 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 05:01:44,227 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:44,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 54 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:01:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 05:01:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-19 05:01:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 43 states have internal predecessors, (45), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 05:01:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2023-11-19 05:01:44,242 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 20 [2023-11-19 05:01:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:44,243 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2023-11-19 05:01:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 05:01:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2023-11-19 05:01:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 05:01:44,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:44,245 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:44,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:01:44,246 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:44,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash 295396754, now seen corresponding path program 1 times [2023-11-19 05:01:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:44,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506588630] [2023-11-19 05:01:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:44,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:01:44,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506588630] [2023-11-19 05:01:44,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506588630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:44,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:44,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:01:44,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991364858] [2023-11-19 05:01:44,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:44,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:01:44,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:01:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:44,610 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:01:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:44,972 INFO L93 Difference]: Finished difference Result 212 states and 283 transitions. [2023-11-19 05:01:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:01:44,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-19 05:01:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:44,983 INFO L225 Difference]: With dead ends: 212 [2023-11-19 05:01:44,983 INFO L226 Difference]: Without dead ends: 158 [2023-11-19 05:01:44,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:01:44,994 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 113 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:44,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 240 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:01:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-19 05:01:45,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 119. [2023-11-19 05:01:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 87 states have internal predecessors, (95), 26 states have call successors, (26), 19 states have call predecessors, (26), 19 states have return successors, (34), 17 states have call predecessors, (34), 26 states have call successors, (34) [2023-11-19 05:01:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions. [2023-11-19 05:01:45,055 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 30 [2023-11-19 05:01:45,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:45,056 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 155 transitions. [2023-11-19 05:01:45,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:01:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions. [2023-11-19 05:01:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 05:01:45,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:45,068 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:45,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:01:45,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:45,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:45,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1976712255, now seen corresponding path program 1 times [2023-11-19 05:01:45,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:45,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885240567] [2023-11-19 05:01:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:45,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:01:45,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885240567] [2023-11-19 05:01:45,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885240567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:45,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:45,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 05:01:45,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451656118] [2023-11-19 05:01:45,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:45,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:01:45,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:01:45,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:01:45,412 INFO L87 Difference]: Start difference. First operand 119 states and 155 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:01:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:46,110 INFO L93 Difference]: Finished difference Result 379 states and 501 transitions. [2023-11-19 05:01:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 05:01:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2023-11-19 05:01:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:46,119 INFO L225 Difference]: With dead ends: 379 [2023-11-19 05:01:46,119 INFO L226 Difference]: Without dead ends: 284 [2023-11-19 05:01:46,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:01:46,127 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 225 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:46,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 243 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:01:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-19 05:01:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 227. [2023-11-19 05:01:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 141 states have (on average 1.2836879432624113) internal successors, (181), 164 states have internal predecessors, (181), 51 states have call successors, (51), 33 states have call predecessors, (51), 34 states have return successors, (72), 37 states have call predecessors, (72), 51 states have call successors, (72) [2023-11-19 05:01:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 304 transitions. [2023-11-19 05:01:46,195 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 304 transitions. Word has length 33 [2023-11-19 05:01:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:46,196 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 304 transitions. [2023-11-19 05:01:46,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:01:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 304 transitions. [2023-11-19 05:01:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 05:01:46,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:46,204 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 05:01:46,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:01:46,208 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:46,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2145008637, now seen corresponding path program 1 times [2023-11-19 05:01:46,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:46,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282921366] [2023-11-19 05:01:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:46,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:46,362 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 05:01:46,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:46,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282921366] [2023-11-19 05:01:46,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282921366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:46,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:46,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:01:46,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973358570] [2023-11-19 05:01:46,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:46,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:01:46,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:01:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:01:46,365 INFO L87 Difference]: Start difference. First operand 227 states and 304 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:01:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:46,534 INFO L93 Difference]: Finished difference Result 571 states and 791 transitions. [2023-11-19 05:01:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:01:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-11-19 05:01:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:46,539 INFO L225 Difference]: With dead ends: 571 [2023-11-19 05:01:46,540 INFO L226 Difference]: Without dead ends: 368 [2023-11-19 05:01:46,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:46,544 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 47 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:46,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 246 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-19 05:01:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 359. [2023-11-19 05:01:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 229 states have (on average 1.2489082969432315) internal successors, (286), 257 states have internal predecessors, (286), 74 states have call successors, (74), 50 states have call predecessors, (74), 55 states have return successors, (120), 62 states have call predecessors, (120), 74 states have call successors, (120) [2023-11-19 05:01:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 480 transitions. [2023-11-19 05:01:46,619 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 480 transitions. Word has length 36 [2023-11-19 05:01:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:46,621 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 480 transitions. [2023-11-19 05:01:46,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:01:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 480 transitions. [2023-11-19 05:01:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 05:01:46,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:46,624 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 05:01:46,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:01:46,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:46,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1023703757, now seen corresponding path program 1 times [2023-11-19 05:01:46,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:46,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768229856] [2023-11-19 05:01:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:46,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:46,821 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 05:01:46,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:46,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768229856] [2023-11-19 05:01:46,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768229856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:46,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:46,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:01:46,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481246802] [2023-11-19 05:01:46,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:46,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:01:46,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:01:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:46,824 INFO L87 Difference]: Start difference. First operand 359 states and 480 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 05:01:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:46,974 INFO L93 Difference]: Finished difference Result 761 states and 1003 transitions. [2023-11-19 05:01:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:01:46,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2023-11-19 05:01:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:46,979 INFO L225 Difference]: With dead ends: 761 [2023-11-19 05:01:46,980 INFO L226 Difference]: Without dead ends: 605 [2023-11-19 05:01:46,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:46,984 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 63 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:46,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 271 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-11-19 05:01:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 582. [2023-11-19 05:01:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 372 states have (on average 1.239247311827957) internal successors, (461), 412 states have internal predecessors, (461), 113 states have call successors, (113), 82 states have call predecessors, (113), 96 states have return successors, (200), 100 states have call predecessors, (200), 113 states have call successors, (200) [2023-11-19 05:01:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 774 transitions. [2023-11-19 05:01:47,097 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 774 transitions. Word has length 39 [2023-11-19 05:01:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:47,098 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 774 transitions. [2023-11-19 05:01:47,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 05:01:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 774 transitions. [2023-11-19 05:01:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 05:01:47,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:47,105 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:47,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:01:47,105 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:47,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash -253267804, now seen corresponding path program 1 times [2023-11-19 05:01:47,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:47,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771817601] [2023-11-19 05:01:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:47,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:01:47,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:47,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771817601] [2023-11-19 05:01:47,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771817601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:47,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185746863] [2023-11-19 05:01:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:47,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:47,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:01:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:47,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 05:01:47,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:01:47,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:01:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:01:47,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185746863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:01:47,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660964637] [2023-11-19 05:01:47,695 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-11-19 05:01:47,696 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:01:47,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:01:47,705 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:01:47,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:01:51,306 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 120 for LOIs [2023-11-19 05:01:51,351 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 148 for LOIs [2023-11-19 05:01:52,025 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:02:00,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [660964637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:00,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:02:00,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 5, 6] total 22 [2023-11-19 05:02:00,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116898213] [2023-11-19 05:02:00,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:00,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:02:00,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:00,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:02:00,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-11-19 05:02:00,229 INFO L87 Difference]: Start difference. First operand 582 states and 774 transitions. Second operand has 13 states, 10 states have (on average 2.6) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 05:02:03,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:03,769 INFO L93 Difference]: Finished difference Result 1272 states and 1714 transitions. [2023-11-19 05:02:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 05:02:03,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 60 [2023-11-19 05:02:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:03,775 INFO L225 Difference]: With dead ends: 1272 [2023-11-19 05:02:03,776 INFO L226 Difference]: Without dead ends: 706 [2023-11-19 05:02:03,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 161 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-11-19 05:02:03,780 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 69 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:03,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 300 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 05:02:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-11-19 05:02:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 698. [2023-11-19 05:02:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 450 states have (on average 1.2222222222222223) internal successors, (550), 492 states have internal predecessors, (550), 133 states have call successors, (133), 100 states have call predecessors, (133), 114 states have return successors, (231), 117 states have call predecessors, (231), 133 states have call successors, (231) [2023-11-19 05:02:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 914 transitions. [2023-11-19 05:02:03,903 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 914 transitions. Word has length 60 [2023-11-19 05:02:03,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:03,903 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 914 transitions. [2023-11-19 05:02:03,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 05:02:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 914 transitions. [2023-11-19 05:02:03,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 05:02:03,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:03,908 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:03,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:02:04,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 05:02:04,125 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:04,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:04,125 INFO L85 PathProgramCache]: Analyzing trace with hash -559128769, now seen corresponding path program 1 times [2023-11-19 05:02:04,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:04,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702729401] [2023-11-19 05:02:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:04,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:02:04,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:04,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702729401] [2023-11-19 05:02:04,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702729401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:04,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132230463] [2023-11-19 05:02:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:04,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:04,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:04,394 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:04,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:02:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:04,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 05:02:04,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:02:04,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:02:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:02:05,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132230463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:02:05,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640713221] [2023-11-19 05:02:05,290 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-19 05:02:05,290 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:02:05,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:02:05,292 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:02:05,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:02:07,993 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 22 for LOIs [2023-11-19 05:02:07,999 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2023-11-19 05:02:08,348 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 29 for LOIs [2023-11-19 05:02:08,407 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 29 for LOIs [2023-11-19 05:02:08,453 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 35 for LOIs [2023-11-19 05:02:08,465 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 3 for LOIs [2023-11-19 05:02:08,467 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 50 for LOIs [2023-11-19 05:02:08,496 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:02:12,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8706#(and (= ~pumpRunning~0 0) (= 2 ~waterLevel~0) (= 0 |timeShift___utac_acc__Specification3_spec__1_~tmp___1~1#1|) (= ~methaneLevelCritical~0 0) (= |timeShift_isPumpRunning_#res#1| 0) (= 2 |timeShift_getWaterLevel_#res#1|) (= 2 |timeShift___utac_acc__Specification3_spec__1_~tmp___0~3#1|) (= |timeShift___utac_acc__Specification3_spec__1_~tmp~6#1| 0))' at error location [2023-11-19 05:02:12,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:02:12,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:02:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 23 [2023-11-19 05:02:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631692355] [2023-11-19 05:02:12,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:02:12,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 05:02:12,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 05:02:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2894, Unknown=0, NotChecked=0, Total=3192 [2023-11-19 05:02:12,231 INFO L87 Difference]: Start difference. First operand 698 states and 914 transitions. Second operand has 23 states, 20 states have (on average 5.45) internal successors, (109), 21 states have internal predecessors, (109), 11 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2023-11-19 05:02:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:21,178 INFO L93 Difference]: Finished difference Result 3439 states and 4710 transitions. [2023-11-19 05:02:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2023-11-19 05:02:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 5.45) internal successors, (109), 21 states have internal predecessors, (109), 11 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) Word has length 66 [2023-11-19 05:02:21,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:21,181 INFO L225 Difference]: With dead ends: 3439 [2023-11-19 05:02:21,181 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 05:02:21,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18545 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=4308, Invalid=42132, Unknown=0, NotChecked=0, Total=46440 [2023-11-19 05:02:21,215 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 2482 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 4223 mSolverCounterSat, 1645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2482 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 5868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1645 IncrementalHoareTripleChecker+Valid, 4223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:21,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2482 Valid, 697 Invalid, 5868 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1645 Valid, 4223 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-19 05:02:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 05:02:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 05:02:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:02:21,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 05:02:21,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2023-11-19 05:02:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:21,218 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 05:02:21,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 5.45) internal successors, (109), 21 states have internal predecessors, (109), 11 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2023-11-19 05:02:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 05:02:21,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 05:02:21,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 05:02:21,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:02:21,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c440708-a2d3-4302-b87c-dc52d8ab9e27/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:21,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.