./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec1_product61.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec1_product61.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f250833677b07ed1377ed852c7268af3b652ab26de7f7fe1fca27ae75baf167f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:23:10,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:23:10,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:23:10,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:23:10,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:23:10,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:23:10,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:23:10,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:23:10,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:23:10,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:23:10,629 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:23:10,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:23:10,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:23:10,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:23:10,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:23:10,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:23:10,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:23:10,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:23:10,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:23:10,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:23:10,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:23:10,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:23:10,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:23:10,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:23:10,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:23:10,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:23:10,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:23:10,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:23:10,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:23:10,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:23:10,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:23:10,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:23:10,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:23:10,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:23:10,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:23:10,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:23:10,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:23:10,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:23:10,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:23:10,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:23:10,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:23:10,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:23:10,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:23:10,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:23:10,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:23:10,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:23:10,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:23:10,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:23:10,745 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:23:10,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:23:10,745 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:23:10,746 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:23:10,760 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:23:10,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:23:10,760 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:23:10,760 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:23:10,761 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:23:10,761 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:23:10,761 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:23:10,761 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:23:10,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:23:10,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:23:10,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:23:10,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:23:10,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:23:10,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:23:10,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:23:10,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:23:10,764 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:23:10,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:23:10,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:23:10,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:23:10,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:23:10,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:23:10,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:10,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:23:10,767 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:23:10,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:23:10,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:23:10,768 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:23:10,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:23:10,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:23:10,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:23:10,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f250833677b07ed1377ed852c7268af3b652ab26de7f7fe1fca27ae75baf167f [2022-10-17 17:23:11,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:23:11,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:23:11,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:23:11,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:23:11,056 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:23:11,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/minepump_spec1_product61.cil.c [2022-10-17 17:23:11,126 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/data/66461ac08/4d3ecf8625b24367b00e0d6b8860d816/FLAGfc80d83ee [2022-10-17 17:23:11,805 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:23:11,815 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/sv-benchmarks/c/product-lines/minepump_spec1_product61.cil.c [2022-10-17 17:23:11,835 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/data/66461ac08/4d3ecf8625b24367b00e0d6b8860d816/FLAGfc80d83ee [2022-10-17 17:23:12,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/data/66461ac08/4d3ecf8625b24367b00e0d6b8860d816 [2022-10-17 17:23:12,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:23:12,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:23:12,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:12,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:23:12,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:23:12,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51bc9787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12, skipping insertion in model container [2022-10-17 17:23:12,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:23:12,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:23:12,366 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/sv-benchmarks/c/product-lines/minepump_spec1_product61.cil.c[3777,3790] [2022-10-17 17:23:12,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:12,535 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:23:12,563 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/sv-benchmarks/c/product-lines/minepump_spec1_product61.cil.c[3777,3790] [2022-10-17 17:23:12,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:12,658 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:23:12,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12 WrapperNode [2022-10-17 17:23:12,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:12,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:12,661 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:23:12,661 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:23:12,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,737 INFO L138 Inliner]: procedures = 57, calls = 160, calls flagged for inlining = 22, calls inlined = 19, statements flattened = 268 [2022-10-17 17:23:12,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:12,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:23:12,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:23:12,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:23:12,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:23:12,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:23:12,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:23:12,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:23:12,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (1/1) ... [2022-10-17 17:23:12,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:12,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:12,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:23:12,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:23:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:23:12,879 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-10-17 17:23:12,879 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-10-17 17:23:12,879 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:23:12,879 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:23:12,879 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:23:12,880 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:23:12,880 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2022-10-17 17:23:12,880 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2022-10-17 17:23:12,880 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:23:12,880 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:23:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-10-17 17:23:12,881 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-10-17 17:23:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__methaneQuery [2022-10-17 17:23:12,881 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__methaneQuery [2022-10-17 17:23:12,881 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2022-10-17 17:23:12,882 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2022-10-17 17:23:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-10-17 17:23:12,882 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-10-17 17:23:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:23:12,882 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-10-17 17:23:12,883 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-10-17 17:23:12,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:23:12,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:23:12,961 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:23:12,963 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:23:13,484 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:23:13,675 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:23:13,675 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:23:13,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:13 BoogieIcfgContainer [2022-10-17 17:23:13,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:23:13,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:23:13,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:23:13,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:23:13,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:23:12" (1/3) ... [2022-10-17 17:23:13,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10472282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:13, skipping insertion in model container [2022-10-17 17:23:13,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:12" (2/3) ... [2022-10-17 17:23:13,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10472282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:13, skipping insertion in model container [2022-10-17 17:23:13,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:13" (3/3) ... [2022-10-17 17:23:13,689 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product61.cil.c [2022-10-17 17:23:13,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:23:13,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:23:13,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:23:13,797 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@510f8afd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:23:13,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:23:13,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 54 states have internal predecessors, (61), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-10-17 17:23:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:23:13,824 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:13,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:13,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1529820237, now seen corresponding path program 1 times [2022-10-17 17:23:13,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:13,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526268794] [2022-10-17 17:23:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:14,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:14,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526268794] [2022-10-17 17:23:14,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526268794] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:14,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:14,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:23:14,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935479912] [2022-10-17 17:23:14,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:14,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:23:14,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:23:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:23:14,085 INFO L87 Difference]: Start difference. First operand has 74 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 54 states have internal predecessors, (61), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-10-17 17:23:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:14,160 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2022-10-17 17:23:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:23:14,163 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-10-17 17:23:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:14,173 INFO L225 Difference]: With dead ends: 146 [2022-10-17 17:23:14,173 INFO L226 Difference]: Without dead ends: 69 [2022-10-17 17:23:14,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:23:14,181 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:14,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-10-17 17:23:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-10-17 17:23:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 50 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2022-10-17 17:23:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2022-10-17 17:23:14,245 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 16 [2022-10-17 17:23:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:14,246 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2022-10-17 17:23:14,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-10-17 17:23:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2022-10-17 17:23:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:23:14,249 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:14,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:14,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:23:14,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2043320348, now seen corresponding path program 1 times [2022-10-17 17:23:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132469850] [2022-10-17 17:23:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:14,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:14,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132469850] [2022-10-17 17:23:14,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132469850] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:14,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:14,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:14,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058783203] [2022-10-17 17:23:14,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:14,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:14,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:14,384 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-10-17 17:23:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:14,445 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2022-10-17 17:23:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:14,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 [2022-10-17 17:23:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:14,452 INFO L225 Difference]: With dead ends: 115 [2022-10-17 17:23:14,453 INFO L226 Difference]: Without dead ends: 61 [2022-10-17 17:23:14,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:14,456 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:14,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-17 17:23:14,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-10-17 17:23:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 45 states have internal predecessors, (47), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 17:23:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2022-10-17 17:23:14,480 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 17 [2022-10-17 17:23:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:14,481 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2022-10-17 17:23:14,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-10-17 17:23:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2022-10-17 17:23:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:23:14,488 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:14,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:23:14,488 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:14,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash 729327852, now seen corresponding path program 1 times [2022-10-17 17:23:14,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:14,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163362822] [2022-10-17 17:23:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:14,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:14,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:14,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163362822] [2022-10-17 17:23:14,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163362822] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:14,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:14,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575412590] [2022-10-17 17:23:14,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:14,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:14,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:14,674 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-10-17 17:23:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:14,742 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2022-10-17 17:23:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 19 [2022-10-17 17:23:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:14,746 INFO L225 Difference]: With dead ends: 120 [2022-10-17 17:23:14,746 INFO L226 Difference]: Without dead ends: 61 [2022-10-17 17:23:14,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:14,757 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:14,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 60 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-17 17:23:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-10-17 17:23:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 45 states have internal predecessors, (46), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 17:23:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2022-10-17 17:23:14,769 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 19 [2022-10-17 17:23:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:14,770 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2022-10-17 17:23:14,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-10-17 17:23:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2022-10-17 17:23:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 17:23:14,782 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:14,782 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] [2022-10-17 17:23:14,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:23:14,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:14,785 INFO L85 PathProgramCache]: Analyzing trace with hash 465414933, now seen corresponding path program 1 times [2022-10-17 17:23:14,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:14,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498737719] [2022-10-17 17:23:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:14,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:14,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:14,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498737719] [2022-10-17 17:23:14,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498737719] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:14,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:14,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:23:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032244772] [2022-10-17 17:23:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:14,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:14,971 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 17:23:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:15,209 INFO L93 Difference]: Finished difference Result 190 states and 234 transitions. [2022-10-17 17:23:15,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:23:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-10-17 17:23:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:15,216 INFO L225 Difference]: With dead ends: 190 [2022-10-17 17:23:15,217 INFO L226 Difference]: Without dead ends: 131 [2022-10-17 17:23:15,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:23:15,221 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 122 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:15,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 170 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-10-17 17:23:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2022-10-17 17:23:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 87 states have internal predecessors, (95), 22 states have call successors, (22), 18 states have call predecessors, (22), 23 states have return successors, (29), 24 states have call predecessors, (29), 22 states have call successors, (29) [2022-10-17 17:23:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2022-10-17 17:23:15,270 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 30 [2022-10-17 17:23:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:15,270 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2022-10-17 17:23:15,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 17:23:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2022-10-17 17:23:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 17:23:15,273 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:15,273 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] [2022-10-17 17:23:15,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:23:15,274 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:15,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1668464223, now seen corresponding path program 1 times [2022-10-17 17:23:15,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:15,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448045662] [2022-10-17 17:23:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:15,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:15,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448045662] [2022-10-17 17:23:15,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448045662] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:15,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:15,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:23:15,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262730805] [2022-10-17 17:23:15,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:15,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:23:15,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:15,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:23:15,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:15,428 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:23:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:15,631 INFO L93 Difference]: Finished difference Result 371 states and 441 transitions. [2022-10-17 17:23:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:23:15,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-10-17 17:23:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:15,640 INFO L225 Difference]: With dead ends: 371 [2022-10-17 17:23:15,640 INFO L226 Difference]: Without dead ends: 248 [2022-10-17 17:23:15,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:23:15,643 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 54 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:15,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 321 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-10-17 17:23:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 236. [2022-10-17 17:23:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 162 states have internal predecessors, (173), 42 states have call successors, (42), 34 states have call predecessors, (42), 44 states have return successors, (56), 46 states have call predecessors, (56), 42 states have call successors, (56) [2022-10-17 17:23:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 271 transitions. [2022-10-17 17:23:15,727 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 271 transitions. Word has length 35 [2022-10-17 17:23:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:15,728 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 271 transitions. [2022-10-17 17:23:15,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:23:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 271 transitions. [2022-10-17 17:23:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 17:23:15,732 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:15,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:15,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:23:15,733 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash -569823899, now seen corresponding path program 1 times [2022-10-17 17:23:15,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:15,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660821774] [2022-10-17 17:23:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:15,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:16,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660821774] [2022-10-17 17:23:16,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660821774] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:16,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:16,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:23:16,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608773793] [2022-10-17 17:23:16,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:16,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:16,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:16,063 INFO L87 Difference]: Start difference. First operand 236 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:23:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:16,320 INFO L93 Difference]: Finished difference Result 248 states and 283 transitions. [2022-10-17 17:23:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:23:16,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-10-17 17:23:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:16,323 INFO L225 Difference]: With dead ends: 248 [2022-10-17 17:23:16,324 INFO L226 Difference]: Without dead ends: 246 [2022-10-17 17:23:16,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:23:16,328 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 76 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:16,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 172 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-10-17 17:23:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2022-10-17 17:23:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 162 states have internal predecessors, (171), 42 states have call successors, (42), 34 states have call predecessors, (42), 44 states have return successors, (56), 46 states have call predecessors, (56), 42 states have call successors, (56) [2022-10-17 17:23:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 269 transitions. [2022-10-17 17:23:16,378 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 269 transitions. Word has length 38 [2022-10-17 17:23:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:16,380 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 269 transitions. [2022-10-17 17:23:16,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:23:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 269 transitions. [2022-10-17 17:23:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 17:23:16,382 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:16,382 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:16,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:23:16,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1814400766, now seen corresponding path program 1 times [2022-10-17 17:23:16,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:16,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226766062] [2022-10-17 17:23:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:23:16,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:16,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226766062] [2022-10-17 17:23:16,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226766062] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:16,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:16,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:23:16,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155283005] [2022-10-17 17:23:16,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:16,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:23:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:23:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:23:16,803 INFO L87 Difference]: Start difference. First operand 236 states and 269 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 17:23:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:17,039 INFO L93 Difference]: Finished difference Result 588 states and 684 transitions. [2022-10-17 17:23:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:23:17,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-10-17 17:23:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:17,043 INFO L225 Difference]: With dead ends: 588 [2022-10-17 17:23:17,043 INFO L226 Difference]: Without dead ends: 354 [2022-10-17 17:23:17,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:23:17,046 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 99 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:17,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 318 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:23:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-10-17 17:23:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 310. [2022-10-17 17:23:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 199 states have (on average 1.135678391959799) internal successors, (226), 213 states have internal predecessors, (226), 53 states have call successors, (53), 47 states have call predecessors, (53), 57 states have return successors, (67), 57 states have call predecessors, (67), 53 states have call successors, (67) [2022-10-17 17:23:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 346 transitions. [2022-10-17 17:23:17,097 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 346 transitions. Word has length 43 [2022-10-17 17:23:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:17,097 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 346 transitions. [2022-10-17 17:23:17,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-10-17 17:23:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 346 transitions. [2022-10-17 17:23:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 17:23:17,101 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:17,101 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:17,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:23:17,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:17,103 INFO L85 PathProgramCache]: Analyzing trace with hash -959022314, now seen corresponding path program 1 times [2022-10-17 17:23:17,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:17,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083586252] [2022-10-17 17:23:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:17,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:23:17,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083586252] [2022-10-17 17:23:17,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083586252] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162135182] [2022-10-17 17:23:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:17,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:17,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_223c7e87-0db3-4202-826f-370421e9243e/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:23:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-17 17:23:17,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:18,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:23:18,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162135182] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228270182] [2022-10-17 17:23:18,890 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-10-17 17:23:18,890 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:18,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:18,901 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:18,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:23,653 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 294 for LOIs [2022-10-17 17:23:23,719 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 316 for LOIs [2022-10-17 17:23:25,880 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__methaneQuery with input of size 311 for LOIs [2022-10-17 17:23:27,301 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 311 for LOIs [2022-10-17 17:23:29,086 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneAlarm with input of size 312 for LOIs [2022-10-17 17:23:30,259 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 43 for LOIs [2022-10-17 17:23:30,266 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 292 for LOIs [2022-10-17 17:23:30,305 INFO L180 IcfgInterpreter]: Interpretation finished