./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9 --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 c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- 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-6b4ec56 [2022-11-20 20:50:15,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:50:15,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:50:15,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:50:15,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:50:15,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:50:15,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:50:15,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:50:15,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:50:15,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:50:15,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:50:15,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:50:15,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:50:15,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:50:15,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:50:15,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:50:15,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:50:15,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:50:15,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:50:15,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:50:15,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:50:15,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:50:15,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:50:15,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:50:15,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:50:15,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:50:15,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:50:15,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:50:15,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:50:15,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:50:15,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:50:15,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:50:15,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:50:15,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:50:15,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:50:15,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:50:15,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:50:15,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:50:15,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:50:15,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:50:15,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:50:15,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:50:15,860 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:50:15,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:50:15,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:50:15,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:50:15,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:50:15,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:50:15,862 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:50:15,862 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:50:15,863 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:50:15,863 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:50:15,864 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:50:15,864 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:50:15,864 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:50:15,865 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:50:15,865 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:50:15,865 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:50:15,865 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:50:15,866 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:50:15,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:50:15,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:50:15,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:50:15,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:50:15,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:50:15,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:50:15,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:50:15,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:50:15,868 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:50:15,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:50:15,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:50:15,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:50:15,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:50:15,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:50:15,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:50:15,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:50:15,871 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:50:15,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:50:15,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:50:15,871 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:50:15,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:50:15,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:50:15,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:50:15,872 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_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-11-20 20:50:16,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:50:16,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:50:16,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:50:16,141 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:50:16,142 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:50:16,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-11-20 20:50:19,113 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:50:19,320 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:50:19,320 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-11-20 20:50:19,330 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/data/846c07571/08cb8990a0c7496d9e631380203ea775/FLAGdb81b4a92 [2022-11-20 20:50:19,347 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/data/846c07571/08cb8990a0c7496d9e631380203ea775 [2022-11-20 20:50:19,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:50:19,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:50:19,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:50:19,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:50:19,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:50:19,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:50:19" (1/1) ... [2022-11-20 20:50:19,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ea7a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:19, skipping insertion in model container [2022-11-20 20:50:19,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:50:19" (1/1) ... [2022-11-20 20:50:19,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:50:19,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:50:19,528 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-11-20 20:50:19,553 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:384) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.BitabsTranslation.abstractShiftRight(BitabsTranslation.java:159) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.constructBinaryBitwiseIntegerExpression(IntegerTranslation.java:190) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.ExpressionTranslation.constructBinaryBitwiseExpression(ExpressionTranslation.java:131) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CExpressionTranslator.handleBitshiftOperation(CExpressionTranslator.java:418) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:834) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:282) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:728) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:282) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1413) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:220) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1087) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1087) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1087) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1489) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:155) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3314) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2388) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:600) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:192) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 20:50:19,558 INFO L158 Benchmark]: Toolchain (without parser) took 206.40ms. Allocated memory is still 213.9MB. Free memory was 167.9MB in the beginning and 158.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 20:50:19,559 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 146.8MB. Free memory is still 90.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:50:19,560 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.16ms. Allocated memory is still 213.9MB. Free memory was 167.2MB in the beginning and 158.2MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 20:50:19,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 146.8MB. Free memory is still 90.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.16ms. Allocated memory is still 213.9MB. Free memory was 167.2MB in the beginning and 158.2MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: NullPointerException: null: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:384) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9 --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 c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- 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-6b4ec56 [2022-11-20 20:50:21,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:50:21,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:50:21,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:50:21,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:50:21,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:50:21,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:50:21,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:50:21,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:50:21,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:50:21,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:50:21,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:50:21,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:50:21,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:50:21,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:50:21,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:50:21,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:50:21,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:50:21,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:50:21,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:50:21,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:50:21,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:50:21,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:50:21,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:50:21,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:50:21,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:50:21,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:50:21,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:50:21,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:50:21,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:50:21,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:50:21,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:50:21,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:50:21,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:50:21,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:50:21,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:50:21,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:50:21,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:50:21,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:50:21,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:50:21,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:50:21,895 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-20 20:50:21,927 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:50:21,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:50:21,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:50:21,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:50:21,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:50:21,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:50:21,930 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:50:21,931 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:50:21,931 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:50:21,931 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:50:21,932 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:50:21,932 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:50:21,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:50:21,933 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:50:21,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:50:21,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:50:21,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:50:21,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:50:21,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:50:21,934 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:50:21,935 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:50:21,935 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:50:21,935 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:50:21,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:50:21,935 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:50:21,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:50:21,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:50:21,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:50:21,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:50:21,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:50:21,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:50:21,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:50:21,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:50:21,938 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:50:21,938 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:50:21,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:50:21,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:50:21,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:50:21,939 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-11-20 20:50:22,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:50:22,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:50:22,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:50:22,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:50:22,323 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:50:22,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-11-20 20:50:25,324 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:50:25,553 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:50:25,558 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-11-20 20:50:25,569 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/data/59005b3b8/90109c39a4c047dd8436e4e44f4f9343/FLAG3a516f321 [2022-11-20 20:50:25,596 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/data/59005b3b8/90109c39a4c047dd8436e4e44f4f9343 [2022-11-20 20:50:25,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:50:25,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:50:25,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:50:25,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:50:25,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:50:25,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:50:25" (1/1) ... [2022-11-20 20:50:25,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e683a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:25, skipping insertion in model container [2022-11-20 20:50:25,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:50:25" (1/1) ... [2022-11-20 20:50:25,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:50:25,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:50:25,886 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-11-20 20:50:25,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:50:25,992 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:50:26,015 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-11-20 20:50:26,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:50:26,061 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:50:26,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26 WrapperNode [2022-11-20 20:50:26,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:50:26,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:50:26,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:50:26,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:50:26,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,102 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2022-11-20 20:50:26,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:50:26,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:50:26,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:50:26,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:50:26,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,152 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:50:26,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:50:26,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:50:26,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:50:26,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (1/1) ... [2022-11-20 20:50:26,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:50:26,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:50:26,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:50:26,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:50:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:50:26,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 20:50:26,245 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-20 20:50:26,245 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-20 20:50:26,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:50:26,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:50:26,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 20:50:26,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 20:50:26,355 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:50:26,357 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:50:26,668 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:50:26,675 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:50:26,675 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:50:26,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:50:26 BoogieIcfgContainer [2022-11-20 20:50:26,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:50:26,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:50:26,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:50:26,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:50:26,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:50:25" (1/3) ... [2022-11-20 20:50:26,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c994ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:50:26, skipping insertion in model container [2022-11-20 20:50:26,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:50:26" (2/3) ... [2022-11-20 20:50:26,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34c994ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:50:26, skipping insertion in model container [2022-11-20 20:50:26,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:50:26" (3/3) ... [2022-11-20 20:50:26,684 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2022-11-20 20:50:26,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:50:26,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:50:26,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:50:26,808 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;@4f588d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:50:26,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:50:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:50:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 20:50:26,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:26,826 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:26,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:26,839 INFO L85 PathProgramCache]: Analyzing trace with hash -760882007, now seen corresponding path program 1 times [2022-11-20 20:50:26,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:26,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236719127] [2022-11-20 20:50:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:26,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:26,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:26,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 20:50:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:27,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:50:27,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:50:27,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:50:27,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:27,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236719127] [2022-11-20 20:50:27,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236719127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:27,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [266742463] [2022-11-20 20:50:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:27,324 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:50:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:50:27,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:50:27,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2022-11-20 20:50:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:27,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:50:27,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:50:27,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:50:27,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [266742463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:27,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736649607] [2022-11-20 20:50:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:27,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:50:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:50:27,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:50:27,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:50:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:27,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:50:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:50:27,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:50:27,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736649607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:50:27,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:50:27,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2022-11-20 20:50:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124096753] [2022-11-20 20:50:27,888 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:50:27,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:50:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:27,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:50:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:50:27,941 INFO L87 Difference]: Start difference. First operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 20:50:28,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:28,699 INFO L93 Difference]: Finished difference Result 380 states and 641 transitions. [2022-11-20 20:50:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:50:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2022-11-20 20:50:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:28,722 INFO L225 Difference]: With dead ends: 380 [2022-11-20 20:50:28,722 INFO L226 Difference]: Without dead ends: 279 [2022-11-20 20:50:28,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:50:28,732 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 322 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:28,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1661 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:50:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-20 20:50:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 112. [2022-11-20 20:50:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 94 states have (on average 1.425531914893617) internal successors, (134), 95 states have internal predecessors, (134), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2022-11-20 20:50:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 168 transitions. [2022-11-20 20:50:28,812 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 168 transitions. Word has length 32 [2022-11-20 20:50:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:28,814 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 168 transitions. [2022-11-20 20:50:28,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 20:50:28,818 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 168 transitions. [2022-11-20 20:50:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 20:50:28,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:28,823 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:28,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 20:50:29,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:29,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:29,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:50:29,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:29,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1276417986, now seen corresponding path program 1 times [2022-11-20 20:50:29,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:29,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046766824] [2022-11-20 20:50:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:29,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:29,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:29,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:29,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 20:50:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:29,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:50:29,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:50:29,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:29,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:29,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046766824] [2022-11-20 20:50:29,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046766824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:29,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:29,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:50:29,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397194162] [2022-11-20 20:50:29,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:29,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:50:29,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:29,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:50:29,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:50:29,575 INFO L87 Difference]: Start difference. First operand 112 states and 168 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:29,700 INFO L93 Difference]: Finished difference Result 248 states and 373 transitions. [2022-11-20 20:50:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:50:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-20 20:50:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:29,706 INFO L225 Difference]: With dead ends: 248 [2022-11-20 20:50:29,706 INFO L226 Difference]: Without dead ends: 187 [2022-11-20 20:50:29,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:50:29,711 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:29,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 448 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:50:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-20 20:50:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2022-11-20 20:50:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 159 states have (on average 1.4150943396226414) internal successors, (225), 158 states have internal predecessors, (225), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-11-20 20:50:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 271 transitions. [2022-11-20 20:50:29,757 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 271 transitions. Word has length 40 [2022-11-20 20:50:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:29,757 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 271 transitions. [2022-11-20 20:50:29,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 271 transitions. [2022-11-20 20:50:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 20:50:29,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:29,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:29,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:29,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:29,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash -596359616, now seen corresponding path program 1 times [2022-11-20 20:50:29,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:29,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720860238] [2022-11-20 20:50:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:29,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:29,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:29,974 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:29,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 20:50:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:30,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:50:30,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:50:30,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:30,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720860238] [2022-11-20 20:50:30,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720860238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:30,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:30,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:50:30,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791981598] [2022-11-20 20:50:30,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:30,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:50:30,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:50:30,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:50:30,096 INFO L87 Difference]: Start difference. First operand 183 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:30,234 INFO L93 Difference]: Finished difference Result 256 states and 381 transitions. [2022-11-20 20:50:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:50:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-20 20:50:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:30,237 INFO L225 Difference]: With dead ends: 256 [2022-11-20 20:50:30,237 INFO L226 Difference]: Without dead ends: 201 [2022-11-20 20:50:30,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:50:30,238 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 105 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:30,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 533 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:50:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-20 20:50:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2022-11-20 20:50:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 152 states have (on average 1.394736842105263) internal successors, (212), 151 states have internal predecessors, (212), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2022-11-20 20:50:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 254 transitions. [2022-11-20 20:50:30,253 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 254 transitions. Word has length 40 [2022-11-20 20:50:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:30,253 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 254 transitions. [2022-11-20 20:50:30,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 254 transitions. [2022-11-20 20:50:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 20:50:30,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:30,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:30,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:30,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:30,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:30,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2082074321, now seen corresponding path program 1 times [2022-11-20 20:50:30,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:30,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473293327] [2022-11-20 20:50:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:30,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:30,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:30,469 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:30,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 20:50:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:30,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:50:30,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:50:30,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:30,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:30,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473293327] [2022-11-20 20:50:30,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473293327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:30,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:30,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:50:30,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778175276] [2022-11-20 20:50:30,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:30,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:50:30,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:50:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:50:30,568 INFO L87 Difference]: Start difference. First operand 174 states and 254 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:30,616 INFO L93 Difference]: Finished difference Result 321 states and 475 transitions. [2022-11-20 20:50:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:50:30,617 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-11-20 20:50:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:30,619 INFO L225 Difference]: With dead ends: 321 [2022-11-20 20:50:30,619 INFO L226 Difference]: Without dead ends: 255 [2022-11-20 20:50:30,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:30,620 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:30,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 338 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-20 20:50:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2022-11-20 20:50:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 199 states have (on average 1.3517587939698492) internal successors, (269), 198 states have internal predecessors, (269), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-11-20 20:50:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 315 transitions. [2022-11-20 20:50:30,640 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 315 transitions. Word has length 43 [2022-11-20 20:50:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:30,641 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 315 transitions. [2022-11-20 20:50:30,641 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:30,641 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 315 transitions. [2022-11-20 20:50:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 20:50:30,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:30,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:30,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:30,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:30,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1847325628, now seen corresponding path program 1 times [2022-11-20 20:50:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:30,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568254180] [2022-11-20 20:50:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:30,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:30,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:30,859 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:30,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 20:50:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:30,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:50:30,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:50:30,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:30,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568254180] [2022-11-20 20:50:30,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568254180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:30,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:30,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:50:30,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952817659] [2022-11-20 20:50:30,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:30,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:50:30,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:50:30,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:50:30,945 INFO L87 Difference]: Start difference. First operand 223 states and 315 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 20:50:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:31,016 INFO L93 Difference]: Finished difference Result 367 states and 518 transitions. [2022-11-20 20:50:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:50:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-11-20 20:50:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:31,018 INFO L225 Difference]: With dead ends: 367 [2022-11-20 20:50:31,018 INFO L226 Difference]: Without dead ends: 147 [2022-11-20 20:50:31,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:31,020 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 27 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:31,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 247 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-20 20:50:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2022-11-20 20:50:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.3277310924369747) internal successors, (158), 121 states have internal predecessors, (158), 11 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-20 20:50:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 185 transitions. [2022-11-20 20:50:31,037 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 185 transitions. Word has length 43 [2022-11-20 20:50:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:31,037 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 185 transitions. [2022-11-20 20:50:31,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 20:50:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 185 transitions. [2022-11-20 20:50:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:50:31,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:31,039 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:31,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:31,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:31,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1563397194, now seen corresponding path program 1 times [2022-11-20 20:50:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869968076] [2022-11-20 20:50:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:31,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:31,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:31,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 20:50:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:31,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:50:31,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:50:31,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:50:31,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:31,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869968076] [2022-11-20 20:50:31,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869968076] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:50:31,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:50:31,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-20 20:50:31,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685363407] [2022-11-20 20:50:31,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:31,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:50:31,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:50:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:50:31,639 INFO L87 Difference]: Start difference. First operand 135 states and 185 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:32,106 INFO L93 Difference]: Finished difference Result 267 states and 392 transitions. [2022-11-20 20:50:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:50:32,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-20 20:50:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:32,108 INFO L225 Difference]: With dead ends: 267 [2022-11-20 20:50:32,108 INFO L226 Difference]: Without dead ends: 231 [2022-11-20 20:50:32,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:50:32,109 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 193 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:32,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 519 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:50:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-20 20:50:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2022-11-20 20:50:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.3194444444444444) internal successors, (190), 147 states have internal predecessors, (190), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-20 20:50:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 223 transitions. [2022-11-20 20:50:32,125 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 223 transitions. Word has length 44 [2022-11-20 20:50:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:32,125 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 223 transitions. [2022-11-20 20:50:32,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 223 transitions. [2022-11-20 20:50:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:50:32,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:32,126 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:32,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:32,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:32,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash -956562740, now seen corresponding path program 1 times [2022-11-20 20:50:32,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:32,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772843697] [2022-11-20 20:50:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:32,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:32,346 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:32,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 20:50:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:50:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:50:32,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:32,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:32,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772843697] [2022-11-20 20:50:32,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772843697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:32,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:32,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:50:32,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178139765] [2022-11-20 20:50:32,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:32,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:50:32,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:32,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:50:32,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:32,425 INFO L87 Difference]: Start difference. First operand 163 states and 223 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:32,460 INFO L93 Difference]: Finished difference Result 170 states and 229 transitions. [2022-11-20 20:50:32,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:50:32,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-20 20:50:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:32,462 INFO L225 Difference]: With dead ends: 170 [2022-11-20 20:50:32,463 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 20:50:32,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:50:32,464 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 5 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:32,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 377 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 20:50:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-11-20 20:50:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.2986111111111112) internal successors, (187), 147 states have internal predecessors, (187), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-20 20:50:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 220 transitions. [2022-11-20 20:50:32,484 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 220 transitions. Word has length 44 [2022-11-20 20:50:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:32,486 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 220 transitions. [2022-11-20 20:50:32,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 220 transitions. [2022-11-20 20:50:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:50:32,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:32,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-20 20:50:32,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:32,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:32,698 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash -261265623, now seen corresponding path program 2 times [2022-11-20 20:50:32,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:32,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186873050] [2022-11-20 20:50:32,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:50:32,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:32,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:32,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:32,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 20:50:32,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:50:32,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:50:32,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:50:32,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:32,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:32,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:32,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186873050] [2022-11-20 20:50:32,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186873050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:32,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:32,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:50:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746736153] [2022-11-20 20:50:32,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:32,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:50:32,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:50:32,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:50:32,868 INFO L87 Difference]: Start difference. First operand 163 states and 220 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:32,971 INFO L93 Difference]: Finished difference Result 202 states and 277 transitions. [2022-11-20 20:50:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:50:32,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-20 20:50:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:32,973 INFO L225 Difference]: With dead ends: 202 [2022-11-20 20:50:32,973 INFO L226 Difference]: Without dead ends: 200 [2022-11-20 20:50:32,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:50:32,974 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 38 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:32,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 589 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-11-20 20:50:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-20 20:50:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2022-11-20 20:50:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 147 states have (on average 1.2925170068027212) internal successors, (190), 150 states have internal predecessors, (190), 14 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-20 20:50:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 223 transitions. [2022-11-20 20:50:32,987 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 223 transitions. Word has length 44 [2022-11-20 20:50:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:32,987 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 223 transitions. [2022-11-20 20:50:32,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:32,988 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 223 transitions. [2022-11-20 20:50:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:50:32,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:32,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-20 20:50:33,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:33,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:33,208 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash -204007321, now seen corresponding path program 1 times [2022-11-20 20:50:33,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:33,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063355004] [2022-11-20 20:50:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:33,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:33,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:33,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:33,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 20:50:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:50:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:33,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:33,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:33,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063355004] [2022-11-20 20:50:33,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063355004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:33,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:33,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:50:33,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601375594] [2022-11-20 20:50:33,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:33,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:50:33,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:33,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:50:33,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:50:33,379 INFO L87 Difference]: Start difference. First operand 167 states and 223 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:33,463 INFO L93 Difference]: Finished difference Result 212 states and 289 transitions. [2022-11-20 20:50:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:50:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-20 20:50:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:33,467 INFO L225 Difference]: With dead ends: 212 [2022-11-20 20:50:33,467 INFO L226 Difference]: Without dead ends: 210 [2022-11-20 20:50:33,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:50:33,468 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 38 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:33,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 460 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-20 20:50:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-20 20:50:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 171. [2022-11-20 20:50:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.2866666666666666) internal successors, (193), 153 states have internal predecessors, (193), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-20 20:50:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 226 transitions. [2022-11-20 20:50:33,485 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 226 transitions. Word has length 44 [2022-11-20 20:50:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:33,486 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 226 transitions. [2022-11-20 20:50:33,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 226 transitions. [2022-11-20 20:50:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 20:50:33,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:33,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:33,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-20 20:50:33,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:33,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:33,699 INFO L85 PathProgramCache]: Analyzing trace with hash 561980754, now seen corresponding path program 1 times [2022-11-20 20:50:33,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:33,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934347592] [2022-11-20 20:50:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:33,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:33,700 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:33,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 20:50:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:50:33,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:50:33,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:33,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:33,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934347592] [2022-11-20 20:50:33,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934347592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:33,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:33,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:50:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459100366] [2022-11-20 20:50:33,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:33,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:50:33,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:50:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:50:33,799 INFO L87 Difference]: Start difference. First operand 171 states and 226 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:33,851 INFO L93 Difference]: Finished difference Result 283 states and 384 transitions. [2022-11-20 20:50:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:50:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-11-20 20:50:33,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:33,854 INFO L225 Difference]: With dead ends: 283 [2022-11-20 20:50:33,854 INFO L226 Difference]: Without dead ends: 231 [2022-11-20 20:50:33,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:33,855 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 77 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:33,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 312 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-20 20:50:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 190. [2022-11-20 20:50:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 168 states have (on average 1.2916666666666667) internal successors, (217), 170 states have internal predecessors, (217), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-20 20:50:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 252 transitions. [2022-11-20 20:50:33,881 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 252 transitions. Word has length 45 [2022-11-20 20:50:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:33,882 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 252 transitions. [2022-11-20 20:50:33,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 252 transitions. [2022-11-20 20:50:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 20:50:33,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:33,883 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:33,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:34,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:34,094 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:34,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2079579127, now seen corresponding path program 1 times [2022-11-20 20:50:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:34,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533003184] [2022-11-20 20:50:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:34,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:34,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:34,096 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:34,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 20:50:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:34,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:50:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:50:34,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:34,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:34,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533003184] [2022-11-20 20:50:34,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533003184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:34,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:34,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:50:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552831273] [2022-11-20 20:50:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:34,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:50:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:50:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:50:34,168 INFO L87 Difference]: Start difference. First operand 190 states and 252 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:34,198 INFO L93 Difference]: Finished difference Result 205 states and 268 transitions. [2022-11-20 20:50:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:50:34,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-11-20 20:50:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:34,200 INFO L225 Difference]: With dead ends: 205 [2022-11-20 20:50:34,200 INFO L226 Difference]: Without dead ends: 166 [2022-11-20 20:50:34,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:34,201 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:34,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-20 20:50:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-20 20:50:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.3055555555555556) internal successors, (188), 147 states have internal predecessors, (188), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-20 20:50:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 221 transitions. [2022-11-20 20:50:34,214 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 221 transitions. Word has length 48 [2022-11-20 20:50:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:34,215 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 221 transitions. [2022-11-20 20:50:34,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 221 transitions. [2022-11-20 20:50:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 20:50:34,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:34,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:34,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:34,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:34,427 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1609971577, now seen corresponding path program 1 times [2022-11-20 20:50:34,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:34,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250807457] [2022-11-20 20:50:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:34,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:34,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:34,429 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:34,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 20:50:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:34,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:50:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:34,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:34,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:34,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250807457] [2022-11-20 20:50:34,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250807457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:34,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:34,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:50:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259258127] [2022-11-20 20:50:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:34,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:50:34,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:50:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:34,536 INFO L87 Difference]: Start difference. First operand 166 states and 221 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:34,643 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2022-11-20 20:50:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:50:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-11-20 20:50:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:34,645 INFO L225 Difference]: With dead ends: 241 [2022-11-20 20:50:34,645 INFO L226 Difference]: Without dead ends: 199 [2022-11-20 20:50:34,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:50:34,646 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 142 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:34,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 332 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:50:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-20 20:50:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2022-11-20 20:50:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.2916666666666667) internal successors, (186), 147 states have internal predecessors, (186), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-20 20:50:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2022-11-20 20:50:34,665 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 49 [2022-11-20 20:50:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:34,666 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2022-11-20 20:50:34,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2022-11-20 20:50:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 20:50:34,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:34,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:34,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:34,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:34,878 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash -908906999, now seen corresponding path program 1 times [2022-11-20 20:50:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:34,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197160092] [2022-11-20 20:50:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:34,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:34,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:34,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:34,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 20:50:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:34,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:50:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:34,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:34,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:34,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197160092] [2022-11-20 20:50:34,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197160092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:34,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:34,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:50:34,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991646931] [2022-11-20 20:50:34,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:34,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:50:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:50:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:50:34,962 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:35,050 INFO L93 Difference]: Finished difference Result 239 states and 312 transitions. [2022-11-20 20:50:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:50:35,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-11-20 20:50:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:35,052 INFO L225 Difference]: With dead ends: 239 [2022-11-20 20:50:35,052 INFO L226 Difference]: Without dead ends: 212 [2022-11-20 20:50:35,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:35,053 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 87 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:35,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 286 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:50:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-20 20:50:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 166. [2022-11-20 20:50:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.2847222222222223) internal successors, (185), 147 states have internal predecessors, (185), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2022-11-20 20:50:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2022-11-20 20:50:35,079 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 49 [2022-11-20 20:50:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:35,080 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2022-11-20 20:50:35,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2022-11-20 20:50:35,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 20:50:35,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:35,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:35,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-20 20:50:35,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:35,292 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:35,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1552744902, now seen corresponding path program 1 times [2022-11-20 20:50:35,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:35,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438996519] [2022-11-20 20:50:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:35,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:35,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:35,295 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:35,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 20:50:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:35,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:50:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:50:35,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:35,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:35,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438996519] [2022-11-20 20:50:35,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438996519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:35,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:35,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:50:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339331324] [2022-11-20 20:50:35,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:35,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:50:35,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:35,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:50:35,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:50:35,436 INFO L87 Difference]: Start difference. First operand 166 states and 218 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:35,755 INFO L93 Difference]: Finished difference Result 270 states and 370 transitions. [2022-11-20 20:50:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:50:35,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-11-20 20:50:35,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:35,757 INFO L225 Difference]: With dead ends: 270 [2022-11-20 20:50:35,758 INFO L226 Difference]: Without dead ends: 246 [2022-11-20 20:50:35,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:50:35,758 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 180 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:35,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 572 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:50:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-20 20:50:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 199. [2022-11-20 20:50:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.283236994219653) internal successors, (222), 177 states have internal predecessors, (222), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-20 20:50:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 263 transitions. [2022-11-20 20:50:35,795 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 263 transitions. Word has length 50 [2022-11-20 20:50:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:35,796 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 263 transitions. [2022-11-20 20:50:35,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 263 transitions. [2022-11-20 20:50:35,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 20:50:35,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:35,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:35,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:36,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:36,009 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:36,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1182826734, now seen corresponding path program 1 times [2022-11-20 20:50:36,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:36,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551411744] [2022-11-20 20:50:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:36,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:36,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:36,019 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:36,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 20:50:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:36,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:50:36,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:50:36,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:36,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:36,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551411744] [2022-11-20 20:50:36,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551411744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:36,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:36,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:50:36,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851990355] [2022-11-20 20:50:36,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:36,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:50:36,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:50:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:50:36,110 INFO L87 Difference]: Start difference. First operand 199 states and 263 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:36,203 INFO L93 Difference]: Finished difference Result 241 states and 312 transitions. [2022-11-20 20:50:36,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:50:36,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-11-20 20:50:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:36,205 INFO L225 Difference]: With dead ends: 241 [2022-11-20 20:50:36,206 INFO L226 Difference]: Without dead ends: 207 [2022-11-20 20:50:36,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:36,207 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 87 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:36,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 230 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:50:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-20 20:50:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2022-11-20 20:50:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.2138728323699421) internal successors, (210), 177 states have internal predecessors, (210), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-20 20:50:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 251 transitions. [2022-11-20 20:50:36,267 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 251 transitions. Word has length 50 [2022-11-20 20:50:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:36,267 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 251 transitions. [2022-11-20 20:50:36,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 251 transitions. [2022-11-20 20:50:36,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 20:50:36,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:36,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:36,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:36,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:36,485 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:36,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1332385442, now seen corresponding path program 1 times [2022-11-20 20:50:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:36,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685487720] [2022-11-20 20:50:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:36,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:36,490 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:36,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-20 20:50:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:36,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:50:36,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:50:36,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:36,569 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:36,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685487720] [2022-11-20 20:50:36,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685487720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:36,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:36,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:50:36,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595113648] [2022-11-20 20:50:36,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:36,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:50:36,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:50:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:50:36,576 INFO L87 Difference]: Start difference. First operand 199 states and 251 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:36,623 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-11-20 20:50:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:50:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-20 20:50:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:36,625 INFO L225 Difference]: With dead ends: 208 [2022-11-20 20:50:36,625 INFO L226 Difference]: Without dead ends: 167 [2022-11-20 20:50:36,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:50:36,626 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:36,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 279 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-20 20:50:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2022-11-20 20:50:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 143 states have internal predecessors, (169), 16 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2022-11-20 20:50:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 201 transitions. [2022-11-20 20:50:36,646 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 201 transitions. Word has length 52 [2022-11-20 20:50:36,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:36,646 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 201 transitions. [2022-11-20 20:50:36,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:36,647 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 201 transitions. [2022-11-20 20:50:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 20:50:36,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:36,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:36,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:36,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:36,859 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:36,859 INFO L85 PathProgramCache]: Analyzing trace with hash -444512686, now seen corresponding path program 1 times [2022-11-20 20:50:36,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:36,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975819866] [2022-11-20 20:50:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:36,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:36,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:36,861 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:36,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 20:50:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:50:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:50:36,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:36,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975819866] [2022-11-20 20:50:36,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975819866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:36,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:36,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:50:36,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640585247] [2022-11-20 20:50:36,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:36,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:50:36,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:36,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:50:36,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:50:36,981 INFO L87 Difference]: Start difference. First operand 161 states and 201 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:37,206 INFO L93 Difference]: Finished difference Result 234 states and 301 transitions. [2022-11-20 20:50:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:50:37,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-20 20:50:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:37,209 INFO L225 Difference]: With dead ends: 234 [2022-11-20 20:50:37,209 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 20:50:37,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:50:37,210 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 87 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:37,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 487 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:50:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 20:50:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 135. [2022-11-20 20:50:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 112 states have (on average 1.25) internal successors, (140), 117 states have internal predecessors, (140), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 20:50:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 172 transitions. [2022-11-20 20:50:37,231 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 172 transitions. Word has length 52 [2022-11-20 20:50:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:37,231 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 172 transitions. [2022-11-20 20:50:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:50:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 172 transitions. [2022-11-20 20:50:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 20:50:37,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:37,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:37,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:37,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:37,443 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash -71376074, now seen corresponding path program 1 times [2022-11-20 20:50:37,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:37,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089581527] [2022-11-20 20:50:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:37,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:37,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:37,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:37,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 20:50:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:37,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:50:37,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:40,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:40,039 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:40,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089581527] [2022-11-20 20:50:40,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089581527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:40,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:40,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:50:40,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613672273] [2022-11-20 20:50:40,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:40,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:50:40,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:40,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:50:40,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:50:40,042 INFO L87 Difference]: Start difference. First operand 135 states and 172 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:50:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:40,093 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2022-11-20 20:50:40,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:50:40,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-11-20 20:50:40,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:40,095 INFO L225 Difference]: With dead ends: 143 [2022-11-20 20:50:40,095 INFO L226 Difference]: Without dead ends: 141 [2022-11-20 20:50:40,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:50:40,096 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 9 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:40,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 481 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2022-11-20 20:50:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-20 20:50:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-20 20:50:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 122 states have internal predecessors, (143), 19 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-20 20:50:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 179 transitions. [2022-11-20 20:50:40,119 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 179 transitions. Word has length 54 [2022-11-20 20:50:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:40,119 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 179 transitions. [2022-11-20 20:50:40,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:50:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 179 transitions. [2022-11-20 20:50:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 20:50:40,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:40,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:40,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:40,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:40,332 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:40,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1768875186, now seen corresponding path program 1 times [2022-11-20 20:50:40,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:40,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821577942] [2022-11-20 20:50:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:40,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:40,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:40,334 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:40,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 20:50:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:50:40,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:45,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:45,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:45,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821577942] [2022-11-20 20:50:45,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821577942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:45,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:45,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:50:45,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337388134] [2022-11-20 20:50:45,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:45,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:50:45,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:50:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2022-11-20 20:50:45,291 INFO L87 Difference]: Start difference. First operand 141 states and 179 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:50:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:45,347 INFO L93 Difference]: Finished difference Result 183 states and 233 transitions. [2022-11-20 20:50:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:50:45,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-11-20 20:50:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:45,349 INFO L225 Difference]: With dead ends: 183 [2022-11-20 20:50:45,349 INFO L226 Difference]: Without dead ends: 181 [2022-11-20 20:50:45,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2022-11-20 20:50:45,350 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 37 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:45,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 592 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 42 Unchecked, 0.0s Time] [2022-11-20 20:50:45,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-20 20:50:45,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 139. [2022-11-20 20:50:45,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 120 states have internal predecessors, (143), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 20:50:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-11-20 20:50:45,372 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 55 [2022-11-20 20:50:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:45,372 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-11-20 20:50:45,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:50:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-11-20 20:50:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 20:50:45,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:45,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:45,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:45,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:45,584 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2067393215, now seen corresponding path program 1 times [2022-11-20 20:50:45,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:45,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640943127] [2022-11-20 20:50:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:45,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:45,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:45,587 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:45,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 20:50:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:45,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:50:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:46,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:46,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:46,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640943127] [2022-11-20 20:50:46,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640943127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:46,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:46,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 20:50:46,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771934908] [2022-11-20 20:50:46,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:46,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:50:46,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:46,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:50:46,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:50:46,193 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:50:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:47,915 INFO L93 Difference]: Finished difference Result 201 states and 256 transitions. [2022-11-20 20:50:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:50:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-11-20 20:50:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:47,918 INFO L225 Difference]: With dead ends: 201 [2022-11-20 20:50:47,918 INFO L226 Difference]: Without dead ends: 189 [2022-11-20 20:50:47,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:50:47,919 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 165 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:47,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 914 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 20:50:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-20 20:50:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 139. [2022-11-20 20:50:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 120 states have internal predecessors, (141), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 20:50:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2022-11-20 20:50:47,950 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 58 [2022-11-20 20:50:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:47,950 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2022-11-20 20:50:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:50:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2022-11-20 20:50:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 20:50:47,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:47,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:47,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:48,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:48,163 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash 589240327, now seen corresponding path program 1 times [2022-11-20 20:50:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:48,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805383019] [2022-11-20 20:50:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:48,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:48,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:48,164 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:48,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 20:50:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:50:48,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:48,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:48,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:48,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805383019] [2022-11-20 20:50:48,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805383019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:48,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:48,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:50:48,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463347971] [2022-11-20 20:50:48,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:48,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:50:48,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:50:48,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:50:48,267 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:50:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:48,347 INFO L93 Difference]: Finished difference Result 158 states and 193 transitions. [2022-11-20 20:50:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:50:48,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-11-20 20:50:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:48,349 INFO L225 Difference]: With dead ends: 158 [2022-11-20 20:50:48,349 INFO L226 Difference]: Without dead ends: 156 [2022-11-20 20:50:48,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:50:48,350 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 40 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:48,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 484 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-20 20:50:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2022-11-20 20:50:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 123 states have internal predecessors, (144), 17 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 20:50:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2022-11-20 20:50:48,383 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 60 [2022-11-20 20:50:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:48,384 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2022-11-20 20:50:48,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:50:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2022-11-20 20:50:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 20:50:48,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:48,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:48,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:48,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:48,596 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:48,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1364362596, now seen corresponding path program 1 times [2022-11-20 20:50:48,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:48,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586254939] [2022-11-20 20:50:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:48,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:48,599 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:48,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 20:50:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:50:48,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:49,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:49,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:49,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586254939] [2022-11-20 20:50:49,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586254939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:49,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:49,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 20:50:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695743586] [2022-11-20 20:50:49,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:49,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:50:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:50:49,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:50:49,107 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:50:51,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:51,929 INFO L93 Difference]: Finished difference Result 371 states and 485 transitions. [2022-11-20 20:50:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:50:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-11-20 20:50:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:51,931 INFO L225 Difference]: With dead ends: 371 [2022-11-20 20:50:51,931 INFO L226 Difference]: Without dead ends: 339 [2022-11-20 20:50:51,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:50:51,932 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 435 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:51,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1028 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 20:50:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-20 20:50:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 169. [2022-11-20 20:50:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 147 states have internal predecessors, (170), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 20:50:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 208 transitions. [2022-11-20 20:50:51,969 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 208 transitions. Word has length 60 [2022-11-20 20:50:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:51,969 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 208 transitions. [2022-11-20 20:50:51,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:50:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 208 transitions. [2022-11-20 20:50:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 20:50:51,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:51,970 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:51,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:52,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:52,182 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 865353347, now seen corresponding path program 1 times [2022-11-20 20:50:52,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:52,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990536675] [2022-11-20 20:50:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:52,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:52,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:52,184 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:52,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 20:50:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:52,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:50:52,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:50:52,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:52,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:52,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990536675] [2022-11-20 20:50:52,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990536675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:52,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:52,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:50:52,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880735005] [2022-11-20 20:50:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:52,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:50:52,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:50:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:50:52,298 INFO L87 Difference]: Start difference. First operand 169 states and 208 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:50:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:52,389 INFO L93 Difference]: Finished difference Result 191 states and 234 transitions. [2022-11-20 20:50:52,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:50:52,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-11-20 20:50:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:52,390 INFO L225 Difference]: With dead ends: 191 [2022-11-20 20:50:52,390 INFO L226 Difference]: Without dead ends: 189 [2022-11-20 20:50:52,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:50:52,391 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 34 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:52,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 480 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:50:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-20 20:50:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 174. [2022-11-20 20:50:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 151 states have internal predecessors, (173), 21 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-20 20:50:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 213 transitions. [2022-11-20 20:50:52,428 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 213 transitions. Word has length 60 [2022-11-20 20:50:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:52,428 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 213 transitions. [2022-11-20 20:50:52,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 20:50:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 213 transitions. [2022-11-20 20:50:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 20:50:52,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:52,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:52,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:52,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:52,639 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:52,639 INFO L85 PathProgramCache]: Analyzing trace with hash 921322142, now seen corresponding path program 1 times [2022-11-20 20:50:52,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:52,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632078051] [2022-11-20 20:50:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:52,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:52,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:52,640 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:52,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 20:50:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:52,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:50:52,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:50:53,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:53,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:53,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632078051] [2022-11-20 20:50:53,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632078051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:53,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:53,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 20:50:53,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081289501] [2022-11-20 20:50:53,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:53,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:50:53,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:50:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:50:53,804 INFO L87 Difference]: Start difference. First operand 174 states and 213 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:50:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:54,396 INFO L93 Difference]: Finished difference Result 301 states and 380 transitions. [2022-11-20 20:50:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:50:54,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2022-11-20 20:50:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:54,399 INFO L225 Difference]: With dead ends: 301 [2022-11-20 20:50:54,399 INFO L226 Difference]: Without dead ends: 281 [2022-11-20 20:50:54,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:50:54,400 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 76 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:54,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1171 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 489 Unchecked, 0.1s Time] [2022-11-20 20:50:54,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-20 20:50:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2022-11-20 20:50:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 151 states have (on average 1.205298013245033) internal successors, (182), 158 states have internal predecessors, (182), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-20 20:50:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 224 transitions. [2022-11-20 20:50:54,448 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 224 transitions. Word has length 65 [2022-11-20 20:50:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:54,449 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 224 transitions. [2022-11-20 20:50:54,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:50:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 224 transitions. [2022-11-20 20:50:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 20:50:54,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:54,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:54,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:54,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:54,661 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:54,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1450417120, now seen corresponding path program 1 times [2022-11-20 20:50:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:54,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014893353] [2022-11-20 20:50:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:54,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:54,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:54,664 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:54,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 20:50:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:50:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:50:55,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:50:55,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:55,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014893353] [2022-11-20 20:50:55,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014893353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:50:55,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:50:55,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 20:50:55,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21883135] [2022-11-20 20:50:55,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:50:55,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:50:55,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:55,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:50:55,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:50:55,178 INFO L87 Difference]: Start difference. First operand 182 states and 224 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:50:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:55,298 INFO L93 Difference]: Finished difference Result 247 states and 309 transitions. [2022-11-20 20:50:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:50:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2022-11-20 20:50:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:55,302 INFO L225 Difference]: With dead ends: 247 [2022-11-20 20:50:55,302 INFO L226 Difference]: Without dead ends: 227 [2022-11-20 20:50:55,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:50:55,308 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 26 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:55,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 677 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 254 Unchecked, 0.0s Time] [2022-11-20 20:50:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-20 20:50:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 181. [2022-11-20 20:50:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 150 states have (on average 1.2) internal successors, (180), 157 states have internal predecessors, (180), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-20 20:50:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 222 transitions. [2022-11-20 20:50:55,371 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 222 transitions. Word has length 65 [2022-11-20 20:50:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:55,371 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 222 transitions. [2022-11-20 20:50:55,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:50:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 222 transitions. [2022-11-20 20:50:55,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 20:50:55,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:55,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:55,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 20:50:55,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:55,586 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:50:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:50:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash -957629534, now seen corresponding path program 1 times [2022-11-20 20:50:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:50:55,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428241008] [2022-11-20 20:50:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:55,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:50:55,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:50:55,588 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:50:55,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 20:50:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:55,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:50:55,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:50:56,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:56,999 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:50:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428241008] [2022-11-20 20:50:56,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428241008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:50:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1915114619] [2022-11-20 20:50:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:56,999 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:50:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:50:57,000 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:50:57,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-20 20:50:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:57,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:50:57,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:50:58,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:58,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1915114619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:50:58,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182762720] [2022-11-20 20:50:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:50:58,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:50:58,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:50:58,816 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:50:58,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 20:50:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:50:58,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:50:58,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:50:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:50:59,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:50:59,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182762720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:50:59,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:50:59,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 22 [2022-11-20 20:50:59,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409356720] [2022-11-20 20:50:59,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:50:59,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 20:50:59,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:50:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 20:50:59,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:50:59,584 INFO L87 Difference]: Start difference. First operand 181 states and 222 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 20:50:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:50:59,917 INFO L93 Difference]: Finished difference Result 294 states and 369 transitions. [2022-11-20 20:50:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:50:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 66 [2022-11-20 20:50:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:50:59,919 INFO L225 Difference]: With dead ends: 294 [2022-11-20 20:50:59,919 INFO L226 Difference]: Without dead ends: 274 [2022-11-20 20:50:59,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:50:59,920 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 48 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:50:59,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1452 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 286 Unchecked, 0.1s Time] [2022-11-20 20:50:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-20 20:50:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 183. [2022-11-20 20:50:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 152 states have (on average 1.2105263157894737) internal successors, (184), 159 states have internal predecessors, (184), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-20 20:50:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 226 transitions. [2022-11-20 20:50:59,979 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 226 transitions. Word has length 66 [2022-11-20 20:50:59,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:50:59,979 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 226 transitions. [2022-11-20 20:50:59,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 20:50:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 226 transitions. [2022-11-20 20:50:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 20:50:59,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:50:59,984 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:50:59,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:00,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:00,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-20 20:51:00,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:00,590 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:00,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:00,591 INFO L85 PathProgramCache]: Analyzing trace with hash -660447408, now seen corresponding path program 1 times [2022-11-20 20:51:00,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:00,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212214063] [2022-11-20 20:51:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:00,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:00,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:00,592 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:00,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 20:51:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:51:00,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:51:01,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:01,207 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:01,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212214063] [2022-11-20 20:51:01,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212214063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:01,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:01,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 20:51:01,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136394617] [2022-11-20 20:51:01,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:01,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:51:01,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:51:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:51:01,210 INFO L87 Difference]: Start difference. First operand 183 states and 226 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:51:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:02,784 INFO L93 Difference]: Finished difference Result 269 states and 335 transitions. [2022-11-20 20:51:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:51:02,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-11-20 20:51:02,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:02,787 INFO L225 Difference]: With dead ends: 269 [2022-11-20 20:51:02,787 INFO L226 Difference]: Without dead ends: 261 [2022-11-20 20:51:02,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:51:02,788 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 123 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:02,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 788 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:51:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-20 20:51:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 184. [2022-11-20 20:51:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 153 states have (on average 1.2026143790849673) internal successors, (184), 160 states have internal predecessors, (184), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-20 20:51:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 226 transitions. [2022-11-20 20:51:02,838 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 226 transitions. Word has length 66 [2022-11-20 20:51:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:02,839 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 226 transitions. [2022-11-20 20:51:02,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:51:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 226 transitions. [2022-11-20 20:51:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 20:51:02,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:02,840 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:02,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:03,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:03,052 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1467102624, now seen corresponding path program 1 times [2022-11-20 20:51:03,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:03,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363153389] [2022-11-20 20:51:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:03,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:03,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:03,054 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:03,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-20 20:51:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:03,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:51:03,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:51:03,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:03,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363153389] [2022-11-20 20:51:03,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363153389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:03,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:03,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:51:03,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454743398] [2022-11-20 20:51:03,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:03,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:51:03,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:51:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:51:03,290 INFO L87 Difference]: Start difference. First operand 184 states and 226 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:51:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:03,559 INFO L93 Difference]: Finished difference Result 311 states and 391 transitions. [2022-11-20 20:51:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:51:03,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-11-20 20:51:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:03,561 INFO L225 Difference]: With dead ends: 311 [2022-11-20 20:51:03,561 INFO L226 Difference]: Without dead ends: 291 [2022-11-20 20:51:03,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:51:03,562 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 91 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:03,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 746 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 188 Unchecked, 0.1s Time] [2022-11-20 20:51:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-20 20:51:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 174. [2022-11-20 20:51:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 145 states have (on average 1.186206896551724) internal successors, (172), 151 states have internal predecessors, (172), 20 states have call successors, (20), 7 states have call predecessors, (20), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 20:51:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2022-11-20 20:51:03,613 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 66 [2022-11-20 20:51:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:03,614 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2022-11-20 20:51:03,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:51:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2022-11-20 20:51:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 20:51:03,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:03,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:03,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:03,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:03,827 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:03,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1151744600, now seen corresponding path program 1 times [2022-11-20 20:51:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:03,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874280430] [2022-11-20 20:51:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:03,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:03,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:03,829 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:03,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-20 20:51:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:03,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:51:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:51:03,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:03,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:03,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874280430] [2022-11-20 20:51:03,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874280430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:03,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:03,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:51:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815129527] [2022-11-20 20:51:03,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:03,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:51:03,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:03,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:51:03,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:51:03,941 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 20:51:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:04,045 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2022-11-20 20:51:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:51:04,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-11-20 20:51:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:04,046 INFO L225 Difference]: With dead ends: 209 [2022-11-20 20:51:04,047 INFO L226 Difference]: Without dead ends: 195 [2022-11-20 20:51:04,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:51:04,048 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 30 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:04,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 466 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:51:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-20 20:51:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 170. [2022-11-20 20:51:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 148 states have internal predecessors, (164), 21 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-20 20:51:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 204 transitions. [2022-11-20 20:51:04,103 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 204 transitions. Word has length 68 [2022-11-20 20:51:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:04,105 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 204 transitions. [2022-11-20 20:51:04,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 20:51:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 204 transitions. [2022-11-20 20:51:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 20:51:04,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:04,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:04,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:04,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:04,319 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash 106001302, now seen corresponding path program 1 times [2022-11-20 20:51:04,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:04,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188465910] [2022-11-20 20:51:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:04,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:04,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:04,320 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:04,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-20 20:51:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:04,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:51:04,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:51:04,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:04,399 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:04,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188465910] [2022-11-20 20:51:04,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188465910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:04,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:04,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:51:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438007528] [2022-11-20 20:51:04,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:04,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:51:04,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:51:04,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:51:04,401 INFO L87 Difference]: Start difference. First operand 170 states and 204 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 20:51:04,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:04,496 INFO L93 Difference]: Finished difference Result 199 states and 236 transitions. [2022-11-20 20:51:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:51:04,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-11-20 20:51:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:04,500 INFO L225 Difference]: With dead ends: 199 [2022-11-20 20:51:04,500 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 20:51:04,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:51:04,501 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 30 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:04,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 466 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:51:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 20:51:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2022-11-20 20:51:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 123 states have internal predecessors, (140), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-20 20:51:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2022-11-20 20:51:04,545 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 68 [2022-11-20 20:51:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:04,545 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2022-11-20 20:51:04,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 20:51:04,546 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2022-11-20 20:51:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 20:51:04,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:04,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:04,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:04,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:04,750 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1565040980, now seen corresponding path program 1 times [2022-11-20 20:51:04,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:04,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420485331] [2022-11-20 20:51:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:04,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:04,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:04,752 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:04,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-20 20:51:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:04,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:51:04,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:51:04,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:04,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420485331] [2022-11-20 20:51:04,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420485331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:04,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:04,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:51:04,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655479909] [2022-11-20 20:51:04,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:04,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:51:04,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:04,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:51:04,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:51:04,850 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:51:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:04,909 INFO L93 Difference]: Finished difference Result 170 states and 200 transitions. [2022-11-20 20:51:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:51:04,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-20 20:51:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:04,910 INFO L225 Difference]: With dead ends: 170 [2022-11-20 20:51:04,910 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 20:51:04,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:51:04,911 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 43 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:04,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 233 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:51:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 20:51:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2022-11-20 20:51:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:51:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2022-11-20 20:51:04,945 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 70 [2022-11-20 20:51:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:04,945 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2022-11-20 20:51:04,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:51:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2022-11-20 20:51:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 20:51:04,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:04,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:04,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:05,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:05,158 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:05,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:05,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1885920814, now seen corresponding path program 1 times [2022-11-20 20:51:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:05,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321580948] [2022-11-20 20:51:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:05,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:05,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:05,160 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:05,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 20:51:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:51:05,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 20:51:05,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:51:05,964 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:05,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321580948] [2022-11-20 20:51:05,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321580948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:51:05,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1783353616] [2022-11-20 20:51:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:05,965 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:51:05,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:51:05,967 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:51:05,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-20 20:51:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:06,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:51:06,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 20:51:06,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:06,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1783353616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:06,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:51:06,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-20 20:51:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341617178] [2022-11-20 20:51:06,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:06,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:51:06,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:51:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:51:06,247 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:51:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:06,559 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2022-11-20 20:51:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:51:06,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-20 20:51:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:06,561 INFO L225 Difference]: With dead ends: 175 [2022-11-20 20:51:06,561 INFO L226 Difference]: Without dead ends: 127 [2022-11-20 20:51:06,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:51:06,562 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 121 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:06,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 247 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:51:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-20 20:51:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2022-11-20 20:51:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 91 states have (on average 1.1428571428571428) internal successors, (104), 93 states have internal predecessors, (104), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:51:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2022-11-20 20:51:06,592 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 70 [2022-11-20 20:51:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:06,592 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2022-11-20 20:51:06,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 20:51:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2022-11-20 20:51:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 20:51:06,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:06,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:06,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:06,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:07,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:51:07,003 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:07,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2134286868, now seen corresponding path program 1 times [2022-11-20 20:51:07,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:07,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535173279] [2022-11-20 20:51:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:07,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:07,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:07,005 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:07,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 20:51:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:07,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:51:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:51:07,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:07,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:07,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535173279] [2022-11-20 20:51:07,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535173279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:07,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:07,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 20:51:07,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572230952] [2022-11-20 20:51:07,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:07,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:51:07,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:51:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:51:07,491 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:51:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:07,598 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2022-11-20 20:51:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:51:07,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2022-11-20 20:51:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:07,600 INFO L225 Difference]: With dead ends: 140 [2022-11-20 20:51:07,600 INFO L226 Difference]: Without dead ends: 130 [2022-11-20 20:51:07,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:51:07,605 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 4 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:07,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 472 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 125 Unchecked, 0.0s Time] [2022-11-20 20:51:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-20 20:51:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 116. [2022-11-20 20:51:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 101 states have internal predecessors, (112), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 20:51:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2022-11-20 20:51:07,644 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 70 [2022-11-20 20:51:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:07,645 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2022-11-20 20:51:07,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 20:51:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2022-11-20 20:51:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 20:51:07,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:07,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:07,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:07,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:07,858 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2093027486, now seen corresponding path program 1 times [2022-11-20 20:51:07,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:07,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215582741] [2022-11-20 20:51:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:07,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:07,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:07,860 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:07,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-20 20:51:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:07,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:51:07,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:51:08,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:51:08,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:08,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215582741] [2022-11-20 20:51:08,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215582741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:51:08,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [589550138] [2022-11-20 20:51:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:08,356 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:51:08,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:51:08,357 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:51:08,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-20 20:51:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:08,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:51:08,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:51:08,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:51:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:51:08,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [589550138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:51:08,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252926641] [2022-11-20 20:51:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:08,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:51:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:51:08,537 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:51:08,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 20:51:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:08,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:51:08,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:51:08,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:51:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:51:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252926641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:51:08,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-20 20:51:08,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 8, 8] total 11 [2022-11-20 20:51:08,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71209438] [2022-11-20 20:51:08,711 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-20 20:51:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 20:51:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:08,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 20:51:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:51:08,713 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:08,830 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2022-11-20 20:51:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:51:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 69 [2022-11-20 20:51:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:08,832 INFO L225 Difference]: With dead ends: 128 [2022-11-20 20:51:08,832 INFO L226 Difference]: Without dead ends: 68 [2022-11-20 20:51:08,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 361 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:51:08,833 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 28 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:08,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 554 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-20 20:51:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-20 20:51:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-20 20:51:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 56 states have internal predecessors, (63), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:51:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-11-20 20:51:08,850 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 69 [2022-11-20 20:51:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:08,850 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-11-20 20:51:08,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-11-20 20:51:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 20:51:08,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:08,851 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:08,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:09,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:09,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-20 20:51:09,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:51:09,457 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:09,458 INFO L85 PathProgramCache]: Analyzing trace with hash 438339121, now seen corresponding path program 1 times [2022-11-20 20:51:09,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:09,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725724281] [2022-11-20 20:51:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:09,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:09,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:09,459 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:09,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 20:51:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:51:09,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 20:51:10,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:10,035 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:10,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725724281] [2022-11-20 20:51:10,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725724281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:10,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:10,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 20:51:10,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89365259] [2022-11-20 20:51:10,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:10,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 20:51:10,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 20:51:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:51:10,037 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:10,130 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-11-20 20:51:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:51:10,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-11-20 20:51:10,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:10,132 INFO L225 Difference]: With dead ends: 104 [2022-11-20 20:51:10,132 INFO L226 Difference]: Without dead ends: 96 [2022-11-20 20:51:10,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:51:10,133 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 21 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:10,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 525 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 151 Unchecked, 0.0s Time] [2022-11-20 20:51:10,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-20 20:51:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2022-11-20 20:51:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 69 states have internal predecessors, (77), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:51:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-11-20 20:51:10,153 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 73 [2022-11-20 20:51:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:10,153 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-11-20 20:51:10,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-11-20 20:51:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 20:51:10,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:10,155 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:10,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:10,366 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:10,367 INFO L85 PathProgramCache]: Analyzing trace with hash 696504559, now seen corresponding path program 1 times [2022-11-20 20:51:10,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:10,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862623621] [2022-11-20 20:51:10,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:10,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:10,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:10,368 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:10,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 20:51:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:10,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:51:10,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 20:51:11,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:11,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:11,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862623621] [2022-11-20 20:51:11,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862623621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:11,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:11,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 20:51:11,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669436859] [2022-11-20 20:51:11,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:11,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 20:51:11,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 20:51:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:51:11,603 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:11,735 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2022-11-20 20:51:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:51:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-11-20 20:51:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:11,737 INFO L225 Difference]: With dead ends: 108 [2022-11-20 20:51:11,737 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 20:51:11,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:51:11,738 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 20 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:11,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 626 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 286 Unchecked, 0.1s Time] [2022-11-20 20:51:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 20:51:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2022-11-20 20:51:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 62 states have internal predecessors, (69), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 20:51:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2022-11-20 20:51:11,758 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 73 [2022-11-20 20:51:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:11,760 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2022-11-20 20:51:11,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2022-11-20 20:51:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 20:51:11,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:11,762 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:11,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:11,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:11,974 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:11,974 INFO L85 PathProgramCache]: Analyzing trace with hash -405666381, now seen corresponding path program 1 times [2022-11-20 20:51:11,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:11,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429521642] [2022-11-20 20:51:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:11,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:11,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:11,975 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:11,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 20:51:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:51:12,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 20:51:13,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:13,281 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:13,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429521642] [2022-11-20 20:51:13,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429521642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:13,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:13,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 20:51:13,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112591984] [2022-11-20 20:51:13,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:13,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 20:51:13,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:13,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 20:51:13,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:51:13,283 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:15,830 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2022-11-20 20:51:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:51:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-11-20 20:51:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:15,832 INFO L225 Difference]: With dead ends: 107 [2022-11-20 20:51:15,832 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 20:51:15,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:51:15,833 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 83 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:15,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 444 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 259 Invalid, 0 Unknown, 40 Unchecked, 0.8s Time] [2022-11-20 20:51:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 20:51:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2022-11-20 20:51:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 56 states have internal predecessors, (62), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:51:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2022-11-20 20:51:15,849 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 73 [2022-11-20 20:51:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:15,850 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2022-11-20 20:51:15,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2022-11-20 20:51:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 20:51:15,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:15,851 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:15,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:16,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:16,063 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1028998347, now seen corresponding path program 1 times [2022-11-20 20:51:16,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:16,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086923357] [2022-11-20 20:51:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:16,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:16,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:16,064 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:16,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 20:51:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:16,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:51:16,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 20:51:16,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:16,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086923357] [2022-11-20 20:51:16,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086923357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:16,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:16,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 20:51:16,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620573508] [2022-11-20 20:51:16,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:51:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:51:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:51:16,677 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:17,234 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-11-20 20:51:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:51:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-11-20 20:51:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:17,236 INFO L225 Difference]: With dead ends: 96 [2022-11-20 20:51:17,236 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 20:51:17,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:51:17,237 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 36 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:17,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 587 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-11-20 20:51:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 20:51:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2022-11-20 20:51:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 20:51:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2022-11-20 20:51:17,257 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 74 [2022-11-20 20:51:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:17,258 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2022-11-20 20:51:17,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2022-11-20 20:51:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 20:51:17,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:17,259 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:17,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:17,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:17,470 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash -770832909, now seen corresponding path program 1 times [2022-11-20 20:51:17,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:17,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564360210] [2022-11-20 20:51:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:17,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:17,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:17,472 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:17,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 20:51:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:17,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:51:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 20:51:18,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:18,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:18,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564360210] [2022-11-20 20:51:18,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564360210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:18,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:18,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 20:51:18,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096335419] [2022-11-20 20:51:18,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:18,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:51:18,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:18,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:51:18,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:51:18,328 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:18,432 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-11-20 20:51:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:51:18,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-11-20 20:51:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:18,433 INFO L225 Difference]: With dead ends: 96 [2022-11-20 20:51:18,433 INFO L226 Difference]: Without dead ends: 68 [2022-11-20 20:51:18,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:51:18,434 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 19 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:18,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 580 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 189 Unchecked, 0.0s Time] [2022-11-20 20:51:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-20 20:51:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-20 20:51:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:51:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-11-20 20:51:18,445 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 74 [2022-11-20 20:51:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:18,445 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-11-20 20:51:18,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-11-20 20:51:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 20:51:18,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:18,446 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:18,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-20 20:51:18,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:18,657 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1423365133, now seen corresponding path program 1 times [2022-11-20 20:51:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:18,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991886891] [2022-11-20 20:51:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:18,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:18,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:18,659 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:18,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 20:51:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:51:18,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 20:51:19,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:19,922 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:19,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991886891] [2022-11-20 20:51:19,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991886891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:19,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:19,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 20:51:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117835765] [2022-11-20 20:51:19,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:19,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 20:51:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 20:51:19,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:51:19,923 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:21,064 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-11-20 20:51:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:51:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-11-20 20:51:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:21,066 INFO L225 Difference]: With dead ends: 76 [2022-11-20 20:51:21,066 INFO L226 Difference]: Without dead ends: 68 [2022-11-20 20:51:21,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:51:21,067 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:21,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 488 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-11-20 20:51:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-20 20:51:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-20 20:51:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 20:51:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-11-20 20:51:21,079 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 74 [2022-11-20 20:51:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:21,080 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-11-20 20:51:21,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-11-20 20:51:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 20:51:21,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:51:21,081 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:51:21,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-20 20:51:21,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:21,283 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:51:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:51:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1165199695, now seen corresponding path program 1 times [2022-11-20 20:51:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:51:21,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747366835] [2022-11-20 20:51:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:51:21,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:21,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:51:21,284 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:51:21,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 20:51:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:51:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:51:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:51:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 20:51:21,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:51:21,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:51:21,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747366835] [2022-11-20 20:51:21,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747366835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:51:21,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:51:21,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 20:51:21,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727472442] [2022-11-20 20:51:21,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:51:21,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:51:21,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:51:21,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:51:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:51:21,496 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:51:21,619 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-11-20 20:51:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:51:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-11-20 20:51:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:51:21,620 INFO L225 Difference]: With dead ends: 68 [2022-11-20 20:51:21,620 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 20:51:21,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:51:21,621 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 9 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:51:21,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 280 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2022-11-20 20:51:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 20:51:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 20:51:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:51:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 20:51:21,622 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2022-11-20 20:51:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:51:21,622 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 20:51:21,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:51:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 20:51:21,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 20:51:21,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 20:51:21,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-20 20:51:21,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3cb2a39-1869-4c86-843d-1854e76840f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:51:21,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 20:52:37,437 WARN L233 SmtUtils]: Spent 1.26m on a formula simplification. DAG size of input: 274 DAG size of output: 258 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 20:52:56,614 WARN L233 SmtUtils]: Spent 19.17s on a formula simplification that was a NOOP. DAG size: 306 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-20 20:53:16,005 WARN L233 SmtUtils]: Spent 18.92s on a formula simplification that was a NOOP. DAG size: 296 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)