./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product37.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product37.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0 --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 e3509f37a4190025a6bf9c4e7a81c42e49e3316a9582aab003e20039c8a6c594 --- 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-e04fb08 [2022-11-16 19:54:06,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:54:06,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:54:06,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:54:06,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:54:06,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:54:06,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:54:06,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:54:06,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:54:06,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:54:06,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:54:06,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:54:06,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:54:06,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:54:06,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:54:06,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:54:06,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:54:06,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:54:06,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:54:06,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:54:06,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:54:06,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:54:06,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:54:06,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:54:06,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:54:06,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:54:06,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:54:06,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:54:06,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:54:06,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:54:06,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:54:06,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:54:06,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:54:06,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:54:06,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:54:06,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:54:06,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:54:06,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:54:06,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:54:06,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:54:06,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:54:06,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:54:06,622 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:54:06,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:54:06,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:54:06,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:54:06,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:54:06,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:54:06,625 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:54:06,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:54:06,626 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:54:06,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:54:06,626 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:54:06,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:54:06,627 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:54:06,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:54:06,627 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:54:06,628 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:54:06,628 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:54:06,628 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:54:06,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:54:06,630 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:54:06,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:54:06,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:54:06,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:54:06,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:54:06,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:54:06,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:54:06,632 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:54:06,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:54:06,632 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:54:06,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:54:06,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:54:06,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:54:06,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:54:06,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:54:06,634 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:54:06,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:54:06,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:54:06,635 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:54:06,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:54:06,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:54:06,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:54:06,637 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_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3509f37a4190025a6bf9c4e7a81c42e49e3316a9582aab003e20039c8a6c594 [2022-11-16 19:54:06,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:54:06,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:54:06,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:54:06,967 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:54:06,969 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:54:06,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/product-lines/minepump_spec4_product37.cil.c [2022-11-16 19:54:07,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/data/3e5076577/0e506b35c711420182004b77febc9e29/FLAG05d98f7ba [2022-11-16 19:54:07,850 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:54:07,851 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/sv-benchmarks/c/product-lines/minepump_spec4_product37.cil.c [2022-11-16 19:54:07,863 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/data/3e5076577/0e506b35c711420182004b77febc9e29/FLAG05d98f7ba [2022-11-16 19:54:08,114 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/data/3e5076577/0e506b35c711420182004b77febc9e29 [2022-11-16 19:54:08,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:54:08,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:54:08,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:54:08,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:54:08,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:54:08,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21be93ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08, skipping insertion in model container [2022-11-16 19:54:08,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:54:08,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:54:08,538 WARN L229 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_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/sv-benchmarks/c/product-lines/minepump_spec4_product37.cil.c[6698,6711] [2022-11-16 19:54:08,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:54:08,677 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:54:08,738 WARN L229 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_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/sv-benchmarks/c/product-lines/minepump_spec4_product37.cil.c[6698,6711] [2022-11-16 19:54:08,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:54:08,828 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:54:08,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08 WrapperNode [2022-11-16 19:54:08,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:54:08,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:54:08,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:54:08,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:54:08,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,887 INFO L138 Inliner]: procedures = 53, calls = 153, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 251 [2022-11-16 19:54:08,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:54:08,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:54:08,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:54:08,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:54:08,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,952 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:54:08,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:54:08,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:54:08,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:54:08,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (1/1) ... [2022-11-16 19:54:08,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:54:08,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:54:09,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:54:09,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:54:09,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:54:09,073 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-16 19:54:09,074 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-16 19:54:09,074 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-16 19:54:09,074 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-16 19:54:09,075 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-16 19:54:09,075 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-16 19:54:09,076 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-11-16 19:54:09,076 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-11-16 19:54:09,076 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-16 19:54:09,076 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-16 19:54:09,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:54:09,077 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-16 19:54:09,077 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-16 19:54:09,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:54:09,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:54:09,197 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:54:09,199 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:54:09,623 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:54:09,825 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:54:09,825 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 19:54:09,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:54:09 BoogieIcfgContainer [2022-11-16 19:54:09,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:54:09,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:54:09,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:54:09,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:54:09,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:54:08" (1/3) ... [2022-11-16 19:54:09,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e8b150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:54:09, skipping insertion in model container [2022-11-16 19:54:09,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:54:08" (2/3) ... [2022-11-16 19:54:09,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e8b150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:54:09, skipping insertion in model container [2022-11-16 19:54:09,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:54:09" (3/3) ... [2022-11-16 19:54:09,844 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product37.cil.c [2022-11-16 19:54:09,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:54:09,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:54:09,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:54:09,966 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;@62385724, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:54:09,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:54:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 41 states have internal predecessors, (48), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 19:54:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:54:09,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:09,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:09,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash -797995083, now seen corresponding path program 1 times [2022-11-16 19:54:10,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842108162] [2022-11-16 19:54:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:10,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:10,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:10,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842108162] [2022-11-16 19:54:10,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842108162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:10,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:10,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:10,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634112746] [2022-11-16 19:54:10,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:10,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 19:54:10,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 19:54:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:54:10,385 INFO L87 Difference]: Start difference. First operand has 51 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 41 states have internal predecessors, (48), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:10,511 INFO L93 Difference]: Finished difference Result 100 states and 137 transitions. [2022-11-16 19:54:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 19:54:10,514 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:54:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:10,543 INFO L225 Difference]: With dead ends: 100 [2022-11-16 19:54:10,543 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 19:54:10,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:54:10,551 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:10,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:54:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 19:54:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-16 19:54:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 37 states have internal predecessors, (40), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 19:54:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-11-16 19:54:10,613 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 12 [2022-11-16 19:54:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:10,613 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-11-16 19:54:10,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-11-16 19:54:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:54:10,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:10,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:10,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:54:10,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2048753739, now seen corresponding path program 1 times [2022-11-16 19:54:10,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:10,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642606437] [2022-11-16 19:54:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:10,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:10,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:10,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642606437] [2022-11-16 19:54:10,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642606437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:10,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:10,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:54:10,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3062328] [2022-11-16 19:54:10,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:10,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:54:10,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:10,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:54:10,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:54:10,766 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:10,824 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-11-16 19:54:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:54:10,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 19:54:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:10,832 INFO L225 Difference]: With dead ends: 69 [2022-11-16 19:54:10,834 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 19:54:10,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:54:10,842 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:10,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 59 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:54:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 19:54:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-16 19:54:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.36) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 19:54:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-11-16 19:54:10,854 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 13 [2022-11-16 19:54:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:10,855 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-11-16 19:54:10,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-11-16 19:54:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:54:10,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:10,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:10,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:54:10,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash 828373270, now seen corresponding path program 1 times [2022-11-16 19:54:10,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:10,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469965270] [2022-11-16 19:54:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:11,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:11,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469965270] [2022-11-16 19:54:11,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469965270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:11,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:11,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:54:11,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330006807] [2022-11-16 19:54:11,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:11,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:11,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:11,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:11,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:11,019 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:11,119 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-11-16 19:54:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:54:11,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:54:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:11,121 INFO L225 Difference]: With dead ends: 74 [2022-11-16 19:54:11,121 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 19:54:11,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:11,123 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:11,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 41 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:54:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 19:54:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-16 19:54:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.32) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 19:54:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-11-16 19:54:11,144 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 15 [2022-11-16 19:54:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:11,144 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-11-16 19:54:11,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-11-16 19:54:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:54:11,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:11,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:11,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:54:11,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:11,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:11,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2105919310, now seen corresponding path program 1 times [2022-11-16 19:54:11,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:11,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004965173] [2022-11-16 19:54:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:11,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:11,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:11,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004965173] [2022-11-16 19:54:11,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004965173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:11,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:11,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:11,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351459572] [2022-11-16 19:54:11,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:11,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:54:11,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:54:11,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:54:11,349 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:11,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:11,462 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2022-11-16 19:54:11,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:54:11,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:54:11,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:11,465 INFO L225 Difference]: With dead ends: 104 [2022-11-16 19:54:11,465 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 19:54:11,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:54:11,467 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:11,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 72 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:54:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 19:54:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-11-16 19:54:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 52 states have internal predecessors, (57), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-16 19:54:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-11-16 19:54:11,485 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 18 [2022-11-16 19:54:11,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:11,486 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-11-16 19:54:11,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:11,486 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-11-16 19:54:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 19:54:11,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:11,487 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] [2022-11-16 19:54:11,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:54:11,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1982686256, now seen corresponding path program 1 times [2022-11-16 19:54:11,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:11,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595766213] [2022-11-16 19:54:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:11,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:11,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:11,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595766213] [2022-11-16 19:54:11,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595766213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:11,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:11,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:54:11,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666617880] [2022-11-16 19:54:11,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:11,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:54:11,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:11,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:54:11,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:11,717 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-16 19:54:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:11,875 INFO L93 Difference]: Finished difference Result 189 states and 233 transitions. [2022-11-16 19:54:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:54:11,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 23 [2022-11-16 19:54:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:11,878 INFO L225 Difference]: With dead ends: 189 [2022-11-16 19:54:11,878 INFO L226 Difference]: Without dead ends: 125 [2022-11-16 19:54:11,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:54:11,881 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 50 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:11,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 146 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:54:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-16 19:54:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2022-11-16 19:54:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 78 states have internal predecessors, (84), 14 states have call successors, (14), 14 states have call predecessors, (14), 16 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-16 19:54:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2022-11-16 19:54:11,908 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 23 [2022-11-16 19:54:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:11,909 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2022-11-16 19:54:11,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-16 19:54:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2022-11-16 19:54:11,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 19:54:11,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:11,911 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] [2022-11-16 19:54:11,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:54:11,912 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:11,913 INFO L85 PathProgramCache]: Analyzing trace with hash 150938154, now seen corresponding path program 1 times [2022-11-16 19:54:11,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:11,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44744296] [2022-11-16 19:54:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:11,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:12,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:12,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44744296] [2022-11-16 19:54:12,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44744296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:12,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:12,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 19:54:12,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479000304] [2022-11-16 19:54:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:12,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:54:12,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:54:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:54:12,302 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 19:54:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:12,778 INFO L93 Difference]: Finished difference Result 251 states and 312 transitions. [2022-11-16 19:54:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:54:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-16 19:54:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:12,782 INFO L225 Difference]: With dead ends: 251 [2022-11-16 19:54:12,782 INFO L226 Difference]: Without dead ends: 187 [2022-11-16 19:54:12,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:54:12,784 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 163 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:12,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 183 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:54:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-16 19:54:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 168. [2022-11-16 19:54:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 132 states have internal predecessors, (142), 24 states have call successors, (24), 22 states have call predecessors, (24), 27 states have return successors, (35), 26 states have call predecessors, (35), 24 states have call successors, (35) [2022-11-16 19:54:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2022-11-16 19:54:12,830 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 26 [2022-11-16 19:54:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:12,830 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2022-11-16 19:54:12,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 19:54:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2022-11-16 19:54:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 19:54:12,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:12,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:12,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 19:54:12,834 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash 912384681, now seen corresponding path program 1 times [2022-11-16 19:54:12,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:12,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988938359] [2022-11-16 19:54:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:12,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:54:12,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:12,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988938359] [2022-11-16 19:54:12,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988938359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:12,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:12,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:54:12,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345378487] [2022-11-16 19:54:12,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:12,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:12,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:12,962 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 19:54:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:13,119 INFO L93 Difference]: Finished difference Result 451 states and 554 transitions. [2022-11-16 19:54:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-16 19:54:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:13,128 INFO L225 Difference]: With dead ends: 451 [2022-11-16 19:54:13,128 INFO L226 Difference]: Without dead ends: 381 [2022-11-16 19:54:13,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:13,132 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 48 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:13,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 129 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:54:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-16 19:54:13,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 341. [2022-11-16 19:54:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 244 states have (on average 1.2377049180327868) internal successors, (302), 268 states have internal predecessors, (302), 43 states have call successors, (43), 39 states have call predecessors, (43), 53 states have return successors, (69), 51 states have call predecessors, (69), 43 states have call successors, (69) [2022-11-16 19:54:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 414 transitions. [2022-11-16 19:54:13,228 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 414 transitions. Word has length 39 [2022-11-16 19:54:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:13,229 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 414 transitions. [2022-11-16 19:54:13,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 19:54:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 414 transitions. [2022-11-16 19:54:13,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 19:54:13,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:13,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:13,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 19:54:13,232 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2061836846, now seen corresponding path program 1 times [2022-11-16 19:54:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:13,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898149953] [2022-11-16 19:54:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:54:13,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:13,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898149953] [2022-11-16 19:54:13,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898149953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:13,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:13,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:54:13,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719074577] [2022-11-16 19:54:13,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:13,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:13,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:13,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:13,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:13,326 INFO L87 Difference]: Start difference. First operand 341 states and 414 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 19:54:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:13,460 INFO L93 Difference]: Finished difference Result 367 states and 443 transitions. [2022-11-16 19:54:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-11-16 19:54:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:13,464 INFO L225 Difference]: With dead ends: 367 [2022-11-16 19:54:13,465 INFO L226 Difference]: Without dead ends: 365 [2022-11-16 19:54:13,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:13,466 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:13,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 113 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:54:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-16 19:54:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 341. [2022-11-16 19:54:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 244 states have (on average 1.2131147540983607) internal successors, (296), 268 states have internal predecessors, (296), 43 states have call successors, (43), 39 states have call predecessors, (43), 53 states have return successors, (69), 51 states have call predecessors, (69), 43 states have call successors, (69) [2022-11-16 19:54:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 408 transitions. [2022-11-16 19:54:13,552 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 408 transitions. Word has length 42 [2022-11-16 19:54:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:13,558 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 408 transitions. [2022-11-16 19:54:13,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 19:54:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 408 transitions. [2022-11-16 19:54:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 19:54:13,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:13,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:13,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 19:54:13,564 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash 919180345, now seen corresponding path program 1 times [2022-11-16 19:54:13,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823746829] [2022-11-16 19:54:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:13,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:54:13,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823746829] [2022-11-16 19:54:13,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823746829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:54:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961698603] [2022-11-16 19:54:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:13,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:54:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:54:13,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:54:13,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:54:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:13,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:54:13,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:14,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:14,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961698603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:14,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:54:14,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 19:54:14,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557937481] [2022-11-16 19:54:14,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:14,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:54:14,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:14,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:54:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:54:14,046 INFO L87 Difference]: Start difference. First operand 341 states and 408 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:54:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:14,146 INFO L93 Difference]: Finished difference Result 457 states and 563 transitions. [2022-11-16 19:54:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:54:14,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-11-16 19:54:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:14,149 INFO L225 Difference]: With dead ends: 457 [2022-11-16 19:54:14,150 INFO L226 Difference]: Without dead ends: 287 [2022-11-16 19:54:14,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:54:14,152 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:14,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 74 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:54:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-16 19:54:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 274. [2022-11-16 19:54:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 194 states have (on average 1.1804123711340206) internal successors, (229), 213 states have internal predecessors, (229), 35 states have call successors, (35), 34 states have call predecessors, (35), 44 states have return successors, (47), 41 states have call predecessors, (47), 35 states have call successors, (47) [2022-11-16 19:54:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 311 transitions. [2022-11-16 19:54:14,210 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 311 transitions. Word has length 44 [2022-11-16 19:54:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:14,212 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 311 transitions. [2022-11-16 19:54:14,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 19:54:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 311 transitions. [2022-11-16 19:54:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 19:54:14,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:14,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:14,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:54:14,432 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1280502866, now seen corresponding path program 1 times [2022-11-16 19:54:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:14,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605561661] [2022-11-16 19:54:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:14,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:54:14,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605561661] [2022-11-16 19:54:14,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605561661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:54:14,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536827484] [2022-11-16 19:54:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:14,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:54:14,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:54:14,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:54:14,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:54:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:54:15,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:15,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:15,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536827484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:15,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:54:15,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2022-11-16 19:54:15,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346364485] [2022-11-16 19:54:15,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:15,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 19:54:15,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 19:54:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:54:15,585 INFO L87 Difference]: Start difference. First operand 274 states and 311 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 19:54:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:16,171 INFO L93 Difference]: Finished difference Result 495 states and 576 transitions. [2022-11-16 19:54:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:54:16,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2022-11-16 19:54:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:16,174 INFO L225 Difference]: With dead ends: 495 [2022-11-16 19:54:16,175 INFO L226 Difference]: Without dead ends: 331 [2022-11-16 19:54:16,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:54:16,176 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 137 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:16,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 125 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:54:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-16 19:54:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 272. [2022-11-16 19:54:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 194 states have (on average 1.1546391752577319) internal successors, (224), 207 states have internal predecessors, (224), 38 states have call successors, (38), 38 states have call predecessors, (38), 39 states have return successors, (45), 36 states have call predecessors, (45), 38 states have call successors, (45) [2022-11-16 19:54:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 307 transitions. [2022-11-16 19:54:16,252 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 307 transitions. Word has length 47 [2022-11-16 19:54:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:16,253 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 307 transitions. [2022-11-16 19:54:16,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 19:54:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 307 transitions. [2022-11-16 19:54:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 19:54:16,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:16,257 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:54:16,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:16,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 19:54:16,464 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash 807578632, now seen corresponding path program 1 times [2022-11-16 19:54:16,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:16,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354352473] [2022-11-16 19:54:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:16,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:54:17,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:54:17,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354352473] [2022-11-16 19:54:17,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354352473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:54:17,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760607558] [2022-11-16 19:54:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:17,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:54:17,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:54:17,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:54:17,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:54:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:17,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 19:54:17,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:54:17,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:54:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 19:54:18,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760607558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:54:18,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297012444] [2022-11-16 19:54:18,181 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-16 19:54:18,181 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:54:18,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:54:18,192 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:54:18,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:54:28,416 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 317 for LOIs [2022-11-16 19:54:28,481 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 44 for LOIs [2022-11-16 19:54:28,707 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 49 for LOIs [2022-11-16 19:54:28,929 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 23 for LOIs [2022-11-16 19:54:28,931 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:54:41,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7493#(and (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~3#1|) (<= 0 |#NULL.base|) (= |timeShift_getWaterLevel_~retValue_acc~7#1| |timeShift_getWaterLevel_#res#1|) (or (and (= ~head~0.offset 0) (= |old(~pumpRunning~0)| 0) (= ~cleanupTimeShifts~0 4)) (and (= |timeShift_processEnvironment_~tmp~2#1| 0) (= ~head~0.offset 0) (= ~cleanupTimeShifts~0 4))) (<= 1 ~systemActive~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1|) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= |#NULL.offset| 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~2#1| 0)) (<= ~methaneLevelCritical~0 0) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~3#1|) (<= 0 ~head~0.base) (= |timeShift_getWaterLevel_~retValue_acc~7#1| ~waterLevel~0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| 0) (<= |#NULL.base| 0) (<= 0 ~methaneLevelCritical~0) (<= ~head~0.base 0) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~8#1| |timeShift_getWaterLevel_#res#1|) (<= ~systemActive~0 1))' at error location [2022-11-16 19:54:41,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:54:41,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:54:41,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 11] total 30 [2022-11-16 19:54:41,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813198271] [2022-11-16 19:54:41,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:54:41,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 19:54:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:54:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 19:54:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2557, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 19:54:41,588 INFO L87 Difference]: Start difference. First operand 272 states and 307 transitions. Second operand has 30 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 states have internal predecessors, (95), 13 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-16 19:54:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:45,107 INFO L93 Difference]: Finished difference Result 661 states and 763 transitions. [2022-11-16 19:54:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 19:54:45,108 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 states have internal predecessors, (95), 13 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 50 [2022-11-16 19:54:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:45,112 INFO L225 Difference]: With dead ends: 661 [2022-11-16 19:54:45,112 INFO L226 Difference]: Without dead ends: 538 [2022-11-16 19:54:45,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=940, Invalid=7250, Unknown=0, NotChecked=0, Total=8190 [2022-11-16 19:54:45,116 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 947 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:45,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [952 Valid, 603 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 19:54:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-16 19:54:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 391. [2022-11-16 19:54:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 280 states have (on average 1.15) internal successors, (322), 297 states have internal predecessors, (322), 54 states have call successors, (54), 54 states have call predecessors, (54), 56 states have return successors, (64), 54 states have call predecessors, (64), 54 states have call successors, (64) [2022-11-16 19:54:45,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 440 transitions. [2022-11-16 19:54:45,196 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 440 transitions. Word has length 50 [2022-11-16 19:54:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:45,197 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 440 transitions. [2022-11-16 19:54:45,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 states have internal predecessors, (95), 13 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-16 19:54:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 440 transitions. [2022-11-16 19:54:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 19:54:45,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:45,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:45,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:45,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:54:45,404 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:54:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1499331558, now seen corresponding path program 2 times [2022-11-16 19:54:45,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:54:45,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774727484] [2022-11-16 19:54:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:45,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:54:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 19:54:45,476 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 19:54:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 19:54:45,569 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 19:54:45,570 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 19:54:45,571 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 19:54:45,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 19:54:45,577 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:45,583 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 19:54:45,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 07:54:45 BoogieIcfgContainer [2022-11-16 19:54:45,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 19:54:45,692 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 19:54:45,693 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 19:54:45,693 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 19:54:45,693 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:54:09" (3/4) ... [2022-11-16 19:54:45,695 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-16 19:54:45,809 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 19:54:45,810 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 19:54:45,810 INFO L158 Benchmark]: Toolchain (without parser) took 37692.51ms. Allocated memory was 119.5MB in the beginning and 408.9MB in the end (delta: 289.4MB). Free memory was 83.6MB in the beginning and 179.8MB in the end (delta: -96.3MB). Peak memory consumption was 193.6MB. Max. memory is 16.1GB. [2022-11-16 19:54:45,811 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 119.5MB. Free memory was 93.2MB in the beginning and 93.2MB in the end (delta: 30.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 19:54:45,811 INFO L158 Benchmark]: CACSL2BoogieTranslator took 706.63ms. Allocated memory is still 119.5MB. Free memory was 83.3MB in the beginning and 85.7MB in the end (delta: -2.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 19:54:45,811 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.57ms. Allocated memory is still 119.5MB. Free memory was 85.7MB in the beginning and 83.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 19:54:45,812 INFO L158 Benchmark]: Boogie Preprocessor took 63.87ms. Allocated memory is still 119.5MB. Free memory was 83.4MB in the beginning and 81.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 19:54:45,813 INFO L158 Benchmark]: RCFGBuilder took 871.80ms. Allocated memory is still 119.5MB. Free memory was 81.4MB in the beginning and 53.3MB in the end (delta: 28.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-16 19:54:45,814 INFO L158 Benchmark]: TraceAbstraction took 35860.43ms. Allocated memory was 119.5MB in the beginning and 408.9MB in the end (delta: 289.4MB). Free memory was 52.1MB in the beginning and 186.1MB in the end (delta: -134.0MB). Peak memory consumption was 158.3MB. Max. memory is 16.1GB. [2022-11-16 19:54:45,814 INFO L158 Benchmark]: Witness Printer took 117.30ms. Allocated memory is still 408.9MB. Free memory was 186.1MB in the beginning and 179.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-16 19:54:45,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 119.5MB. Free memory was 93.2MB in the beginning and 93.2MB in the end (delta: 30.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 706.63ms. Allocated memory is still 119.5MB. Free memory was 83.3MB in the beginning and 85.7MB in the end (delta: -2.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.57ms. Allocated memory is still 119.5MB. Free memory was 85.7MB in the beginning and 83.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.87ms. Allocated memory is still 119.5MB. Free memory was 83.4MB in the beginning and 81.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 871.80ms. Allocated memory is still 119.5MB. Free memory was 81.4MB in the beginning and 53.3MB in the end (delta: 28.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 35860.43ms. Allocated memory was 119.5MB in the beginning and 408.9MB in the end (delta: 289.4MB). Free memory was 52.1MB in the beginning and 186.1MB in the end (delta: -134.0MB). Peak memory consumption was 158.3MB. Max. memory is 16.1GB. * Witness Printer took 117.30ms. Allocated memory is still 408.9MB. Free memory was 186.1MB in the beginning and 179.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 444]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L713] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L451] int methaneLevelCritical = 0; [L165] int pumpRunning = 0; [L450] int waterLevel = 1; [L166] int systemActive = 1; [L344] int cleanupTimeShifts = 4; [L417] int retValue_acc ; [L418] int tmp ; [L422] FCALL select_helpers() [L423] FCALL select_features() [L424] CALL, EXPR valid_product() [L79] int retValue_acc ; [L82] retValue_acc = 1 [L83] return (retValue_acc); [L424] RET, EXPR valid_product() [L424] tmp = valid_product() [L426] COND TRUE \read(tmp) [L428] FCALL setup() [L429] CALL runTest() [L411] CALL test() [L93] int splverifierCounter ; [L94] int tmp ; [L95] int tmp___0 ; [L96] int tmp___1 ; [L97] int tmp___2 ; [L100] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L102] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L104] COND TRUE splverifierCounter < 4 [L110] tmp = __VERIFIER_nondet_int() [L112] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=1] [L114] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L468] COND TRUE waterLevel < 2 [L469] waterLevel = waterLevel + 1 [L114] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=2] [L120] tmp___0 = __VERIFIER_nondet_int() [L122] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, waterLevel=2] [L130] tmp___2 = __VERIFIER_nondet_int() [L132] COND FALSE !(\read(tmp___2)) [L136] tmp___1 = __VERIFIER_nondet_int() [L138] COND FALSE !(\read(tmp___1)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L145] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L173] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L180] COND TRUE \read(systemActive) [L182] CALL processEnvironment() [L228] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L231] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L246] CALL processEnvironment__wrappee__highWaterSensor() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L202] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L205] COND TRUE ! pumpRunning [L207] CALL, EXPR isHighWaterLevel() [L325] int retValue_acc ; [L326] int tmp ; [L327] int tmp___0 ; [L331] CALL, EXPR isHighWaterSensorDry() [L530] int retValue_acc ; [L533] COND FALSE !(waterLevel < 2) [L537] retValue_acc = 0 [L538] return (retValue_acc); [L331] RET, EXPR isHighWaterSensorDry() [L331] tmp = isHighWaterSensorDry() [L333] COND FALSE !(\read(tmp)) [L336] tmp___0 = 1 [L338] retValue_acc = tmp___0 [L339] return (retValue_acc); [L207] RET, EXPR isHighWaterLevel() [L207] tmp = isHighWaterLevel() [L209] COND TRUE \read(tmp) [L211] CALL activatePump() [L256] pumpRunning = 1 [L211] RET activatePump() [L246] RET processEnvironment__wrappee__highWaterSensor() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L182] RET processEnvironment() [L188] CALL __utac_acc__Specification4_spec__1() [L911] int tmp ; [L912] int tmp___0 ; [L916] CALL, EXPR getWaterLevel() [L521] int retValue_acc ; [L524] retValue_acc = waterLevel [L525] return (retValue_acc); [L916] RET, EXPR getWaterLevel() [L916] tmp = getWaterLevel() [L918] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=2, waterLevel=2] [L188] RET __utac_acc__Specification4_spec__1() [L145] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L102] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L104] COND TRUE splverifierCounter < 4 [L110] tmp = __VERIFIER_nondet_int() [L112] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L120] tmp___0 = __VERIFIER_nondet_int() [L122] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=0, waterLevel=2] [L130] tmp___2 = __VERIFIER_nondet_int() [L132] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=2] [L145] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L173] COND TRUE \read(pumpRunning) [L175] CALL lowerWaterLevel() [L456] COND TRUE waterLevel > 0 [L457] waterLevel = waterLevel - 1 [L175] RET lowerWaterLevel() [L180] COND TRUE \read(systemActive) [L182] CALL processEnvironment() [L228] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L231] COND TRUE \read(pumpRunning) [L233] CALL, EXPR isMethaneAlarm() [L269] int retValue_acc ; [L273] CALL, EXPR isMethaneLevelCritical() [L489] int retValue_acc ; [L492] retValue_acc = methaneLevelCritical [L493] return (retValue_acc); [L273] RET, EXPR isMethaneLevelCritical() [L273] retValue_acc = isMethaneLevelCritical() [L275] return (retValue_acc); [L233] RET, EXPR isMethaneAlarm() [L233] tmp = isMethaneAlarm() [L235] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L241] CALL processEnvironment__wrappee__highWaterSensor() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L202] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L205] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L220] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L241] RET processEnvironment__wrappee__highWaterSensor() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=1] [L182] RET processEnvironment() [L188] CALL __utac_acc__Specification4_spec__1() [L911] int tmp ; [L912] int tmp___0 ; [L916] CALL, EXPR getWaterLevel() [L521] int retValue_acc ; [L524] retValue_acc = waterLevel [L525] return (retValue_acc); [L916] RET, EXPR getWaterLevel() [L916] tmp = getWaterLevel() [L918] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=1, waterLevel=1] [L188] RET __utac_acc__Specification4_spec__1() [L145] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=1] [L102] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=1] [L104] COND TRUE splverifierCounter < 4 [L110] tmp = __VERIFIER_nondet_int() [L112] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=1] [L120] tmp___0 = __VERIFIER_nondet_int() [L122] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=1] [L130] tmp___2 = __VERIFIER_nondet_int() [L132] COND FALSE !(\read(tmp___2)) [L136] tmp___1 = __VERIFIER_nondet_int() [L138] COND TRUE \read(tmp___1) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=1, tmp___2=0, waterLevel=1] [L145] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L173] COND TRUE \read(pumpRunning) [L175] CALL lowerWaterLevel() [L456] COND TRUE waterLevel > 0 [L457] waterLevel = waterLevel - 1 [L175] RET lowerWaterLevel() [L180] COND TRUE \read(systemActive) [L182] CALL processEnvironment() [L228] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L231] COND TRUE \read(pumpRunning) [L233] CALL, EXPR isMethaneAlarm() [L269] int retValue_acc ; [L273] CALL, EXPR isMethaneLevelCritical() [L489] int retValue_acc ; [L492] retValue_acc = methaneLevelCritical [L493] return (retValue_acc); [L273] RET, EXPR isMethaneLevelCritical() [L273] retValue_acc = isMethaneLevelCritical() [L275] return (retValue_acc); [L233] RET, EXPR isMethaneAlarm() [L233] tmp = isMethaneAlarm() [L235] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L241] CALL processEnvironment__wrappee__highWaterSensor() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L202] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L205] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L220] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L241] RET processEnvironment__wrappee__highWaterSensor() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=0] [L182] RET processEnvironment() [L188] CALL __utac_acc__Specification4_spec__1() [L911] int tmp ; [L912] int tmp___0 ; [L916] CALL, EXPR getWaterLevel() [L521] int retValue_acc ; [L524] retValue_acc = waterLevel [L525] return (retValue_acc); [L916] RET, EXPR getWaterLevel() [L916] tmp = getWaterLevel() [L918] COND TRUE tmp == 0 [L920] CALL, EXPR isPumpRunning() [L280] int retValue_acc ; [L283] retValue_acc = pumpRunning [L284] return (retValue_acc); [L920] RET, EXPR isPumpRunning() [L920] tmp___0 = isPumpRunning() [L922] COND TRUE \read(tmp___0) [L924] CALL __automaton_fail() [L444] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 35.6s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1508 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1484 mSDsluCounter, 1593 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1097 mSDsCounter, 587 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2280 IncrementalHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 587 mSolverCounterUnsat, 496 mSDtfsCounter, 2280 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 365 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2878 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=391occurred in iteration=11, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 329 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 544 NumberOfCodeBlocks, 544 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 505 ConstructedInterpolants, 0 QuantifiedInterpolants, 1932 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1171 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 15 InterpolantComputations, 10 PerfectInterpolantSequences, 113/149 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-16 19:54:45,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88bff9aa-b33b-4f59-9fc7-a7ad74745fb1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE