./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 64bit --witnessprinter.graph.data.programhash 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 --- 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 20:19:19,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:19:19,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:19:20,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:19:20,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:19:20,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:19:20,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:19:20,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:19:20,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:19:20,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:19:20,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:19:20,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:19:20,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:19:20,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:19:20,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:19:20,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:19:20,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:19:20,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:19:20,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:19:20,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:19:20,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:19:20,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:19:20,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:19:20,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:19:20,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:19:20,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:19:20,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:19:20,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:19:20,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:19:20,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:19:20,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:19:20,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:19:20,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:19:20,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:19:20,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:19:20,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:19:20,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:19:20,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:19:20,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:19:20,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:19:20,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:19:20,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 20:19:20,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:19:20,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:19:20,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:19:20,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:19:20,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:19:20,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:19:20,112 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:19:20,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:19:20,113 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:19:20,113 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:19:20,114 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:19:20,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:19:20,114 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:19:20,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:19:20,115 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:19:20,115 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:19:20,115 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:19:20,116 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:19:20,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:19:20,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:19:20,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:19:20,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:19:20,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:19:20,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:19:20,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:19:20,124 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:19:20,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:19:20,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:19:20,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:19:20,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:19:20,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:19:20,126 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:19:20,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:19:20,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:19:20,126 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:19:20,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:19:20,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:19:20,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:19:20,127 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_0f406d7a-d31e-4568-996c-044e8bc48af7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 [2022-11-20 20:19:20,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:19:20,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:19:20,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:19:20,433 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:19:20,437 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:19:20,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-20 20:19:23,406 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:19:23,947 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:19:23,948 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-20 20:19:23,982 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/data/ac9273eb5/b453a262696548629d29c149e10c321f/FLAG860f57d2c [2022-11-20 20:19:24,001 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/data/ac9273eb5/b453a262696548629d29c149e10c321f [2022-11-20 20:19:24,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:19:24,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:19:24,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:19:24,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:19:24,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:19:24,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:19:24" (1/1) ... [2022-11-20 20:19:24,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a69304f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:24, skipping insertion in model container [2022-11-20 20:19:24,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:19:24" (1/1) ... [2022-11-20 20:19:24,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:19:24,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:19:24,789 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.abstractShiftLeft(BitabsTranslation.java:148) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.constructBinaryBitwiseIntegerExpression(IntegerTranslation.java:187) 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.result.ExpressionResultTransformer.transformDispatchDecaySwitchRexBoolToInt(ExpressionResultTransformer.java:177) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionCallGivenNameAndArguments(FunctionHandler.java:675) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionCallExpression(FunctionHandler.java:509) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1469) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:267) 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.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 20:19:24,802 INFO L158 Benchmark]: Toolchain (without parser) took 795.25ms. Allocated memory is still 157.3MB. Free memory was 120.0MB in the beginning and 83.4MB in the end (delta: 36.6MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-20 20:19:24,803 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 117.4MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:19:24,803 INFO L158 Benchmark]: CACSL2BoogieTranslator took 792.57ms. Allocated memory is still 157.3MB. Free memory was 119.7MB in the beginning and 83.4MB in the end (delta: 36.3MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-20 20:19:24,805 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 117.4MB. Free memory is still 72.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 792.57ms. Allocated memory is still 157.3MB. Free memory was 119.7MB in the beginning and 83.4MB in the end (delta: 36.3MB). Peak memory consumption was 37.7MB. 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_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 64bit --witnessprinter.graph.data.programhash 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 --- 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 20:19:27,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:19:27,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:19:27,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:19:27,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:19:27,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:19:27,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:19:27,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:19:27,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:19:27,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:19:27,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:19:27,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:19:27,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:19:27,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:19:27,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:19:27,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:19:27,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:19:27,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:19:27,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:19:27,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:19:27,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:19:27,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:19:27,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:19:27,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:19:27,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:19:27,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:19:27,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:19:27,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:19:27,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:19:27,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:19:27,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:19:27,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:19:27,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:19:27,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:19:27,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:19:27,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:19:27,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:19:27,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:19:27,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:19:27,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:19:27,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:19:27,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-20 20:19:27,276 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:19:27,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:19:27,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:19:27,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:19:27,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:19:27,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:19:27,279 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:19:27,280 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:19:27,280 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:19:27,280 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:19:27,281 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:19:27,281 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:19:27,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:19:27,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:19:27,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:19:27,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:19:27,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:19:27,283 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:19:27,283 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:19:27,284 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:19:27,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:19:27,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:19:27,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:19:27,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:19:27,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:19:27,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:19:27,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:19:27,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:19:27,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:19:27,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:19:27,286 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:19:27,286 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:19:27,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:19:27,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:19:27,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:19:27,287 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_0f406d7a-d31e-4568-996c-044e8bc48af7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 [2022-11-20 20:19:27,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:19:27,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:19:27,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:19:27,709 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:19:27,710 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:19:27,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-20 20:19:30,781 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:19:31,397 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:19:31,398 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-20 20:19:31,444 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/data/d40823041/52970adf17ea46ddb2a602796c954440/FLAG51bcfc755 [2022-11-20 20:19:31,470 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/data/d40823041/52970adf17ea46ddb2a602796c954440 [2022-11-20 20:19:31,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:19:31,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:19:31,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:19:31,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:19:31,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:19:31,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:19:31" (1/1) ... [2022-11-20 20:19:31,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8edeee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:31, skipping insertion in model container [2022-11-20 20:19:31,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:19:31" (1/1) ... [2022-11-20 20:19:31,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:19:31,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:19:32,946 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_0f406d7a-d31e-4568-996c-044e8bc48af7/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2022-11-20 20:19:32,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:19:33,019 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 20:19:33,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:19:33,370 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_0f406d7a-d31e-4568-996c-044e8bc48af7/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2022-11-20 20:19:33,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:19:33,399 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:19:33,699 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_0f406d7a-d31e-4568-996c-044e8bc48af7/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2022-11-20 20:19:33,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:19:33,768 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:19:33,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33 WrapperNode [2022-11-20 20:19:33,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:19:33,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:19:33,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:19:33,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:19:33,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:33,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,088 INFO L138 Inliner]: procedures = 195, calls = 1552, calls flagged for inlining = 91, calls inlined = 88, statements flattened = 4091 [2022-11-20 20:19:34,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:19:34,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:19:34,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:19:34,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:19:34,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,363 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:19:34,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:19:34,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:19:34,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:19:34,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (1/1) ... [2022-11-20 20:19:34,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:19:34,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:19:34,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:19:34,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:19:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_sw [2022-11-20 20:19:34,495 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_sw [2022-11-20 20:19:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-20 20:19:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-20 20:19:34,496 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-20 20:19:34,496 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_recsrc2 [2022-11-20 20:19:34,496 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_recsrc2 [2022-11-20 20:19:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-20 20:19:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 20:19:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-20 20:19:34,497 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-20 20:19:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_input [2022-11-20 20:19:34,497 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_input [2022-11-20 20:19:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-20 20:19:34,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-20 20:19:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-20 20:19:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-20 20:19:34,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-20 20:19:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_vol [2022-11-20 20:19:34,499 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_vol [2022-11-20 20:19:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-20 20:19:34,500 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-20 20:19:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv2 [2022-11-20 20:19:34,500 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv2 [2022-11-20 20:19:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv1 [2022-11-20 20:19:34,501 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv1 [2022-11-20 20:19:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_held [2022-11-20 20:19:34,501 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_held [2022-11-20 20:19:34,502 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-20 20:19:34,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-20 20:19:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:19:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure mixer_slot_clear [2022-11-20 20:19:34,503 INFO L138 BoogieDeclarations]: Found implementation of procedure mixer_slot_clear [2022-11-20 20:19:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_ioctl1 [2022-11-20 20:19:34,503 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_ioctl1 [2022-11-20 20:19:34,504 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2022-11-20 20:19:34,504 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2022-11-20 20:19:34,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 20:19:34,504 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-20 20:19:34,505 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-20 20:19:34,505 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_up_read_controls_rwsem_of_snd_card [2022-11-20 20:19:34,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_up_read_controls_rwsem_of_snd_card [2022-11-20 20:19:34,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-20 20:19:34,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-20 20:19:34,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-20 20:19:34,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:19:34,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 20:19:34,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 20:19:34,507 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_test [2022-11-20 20:19:34,507 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_test [2022-11-20 20:19:34,507 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-11-20 20:19:34,507 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-11-20 20:19:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-20 20:19:34,508 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-20 20:19:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 20:19:34,508 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-20 20:19:34,509 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-20 20:19:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-20 20:19:34,509 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-20 20:19:34,509 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_open [2022-11-20 20:19:34,510 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_open [2022-11-20 20:19:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-20 20:19:34,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-20 20:19:34,510 INFO L130 BoogieDeclarations]: Found specification of procedure snd_card_file_remove [2022-11-20 20:19:34,510 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_card_file_remove [2022-11-20 20:19:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_find_numid [2022-11-20 20:19:34,511 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_find_numid [2022-11-20 20:19:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv [2022-11-20 20:19:34,512 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv [2022-11-20 20:19:34,512 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-20 20:19:34,512 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-20 20:19:34,512 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_test_id [2022-11-20 20:19:34,512 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_test_id [2022-11-20 20:19:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-20 20:19:34,514 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-20 20:19:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-20 20:19:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure snd_info_free_entry [2022-11-20 20:19:34,514 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_info_free_entry [2022-11-20 20:19:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-11-20 20:19:34,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-11-20 20:19:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-20 20:19:34,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-20 20:19:34,516 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~C_INT [2022-11-20 20:19:34,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~C_INT [2022-11-20 20:19:34,516 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_release [2022-11-20 20:19:34,516 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_release [2022-11-20 20:19:34,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 20:19:34,517 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-11-20 20:19:34,517 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2022-11-20 20:19:34,517 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2022-11-20 20:19:34,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:19:34,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 20:19:34,519 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-20 20:19:34,519 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_notify [2022-11-20 20:19:34,519 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_notify [2022-11-20 20:19:34,519 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-20 20:19:34,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-20 20:19:34,520 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_down_read_controls_rwsem_of_snd_card [2022-11-20 20:19:34,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_down_read_controls_rwsem_of_snd_card [2022-11-20 20:19:34,520 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-11-20 20:19:34,520 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-11-20 20:19:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_sw [2022-11-20 20:19:34,521 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_sw [2022-11-20 20:19:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure snd_oss_info_register [2022-11-20 20:19:34,521 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_oss_info_register [2022-11-20 20:19:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_vol [2022-11-20 20:19:34,521 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_vol [2022-11-20 20:19:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_notify_handler [2022-11-20 20:19:34,522 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_notify_handler [2022-11-20 20:19:34,523 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_dereference [2022-11-20 20:19:34,526 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_dereference [2022-11-20 20:19:34,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:19:34,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:19:35,193 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:19:35,198 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:20:07,155 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:20:07,182 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:20:07,183 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:20:07,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:07 BoogieIcfgContainer [2022-11-20 20:20:07,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:20:07,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:20:07,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:20:07,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:20:07,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:19:31" (1/3) ... [2022-11-20 20:20:07,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f3e7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:20:07, skipping insertion in model container [2022-11-20 20:20:07,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:19:33" (2/3) ... [2022-11-20 20:20:07,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f3e7b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:20:07, skipping insertion in model container [2022-11-20 20:20:07,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:20:07" (3/3) ... [2022-11-20 20:20:07,204 INFO L112 eAbstractionObserver]: Analyzing ICFG m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2022-11-20 20:20:07,223 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:20:07,223 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:20:07,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:20:07,328 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;@e8b990e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:20:07,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:20:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 1183 states, 881 states have (on average 1.4642451759364359) internal successors, (1290), 898 states have internal predecessors, (1290), 254 states have call successors, (254), 46 states have call predecessors, (254), 46 states have return successors, (254), 254 states have call predecessors, (254), 254 states have call successors, (254) [2022-11-20 20:20:07,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:20:07,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:07,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:07,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1005268226, now seen corresponding path program 1 times [2022-11-20 20:20:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:07,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136211720] [2022-11-20 20:20:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:07,370 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 20:20:07,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:07,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:07,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:20:08,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:20:08,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:08,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136211720] [2022-11-20 20:20:08,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136211720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:08,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:20:08,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:20:08,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243861120] [2022-11-20 20:20:08,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:08,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:20:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:20:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:20:08,246 INFO L87 Difference]: Start difference. First operand has 1183 states, 881 states have (on average 1.4642451759364359) internal successors, (1290), 898 states have internal predecessors, (1290), 254 states have call successors, (254), 46 states have call predecessors, (254), 46 states have return successors, (254), 254 states have call predecessors, (254), 254 states have call successors, (254) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 20:20:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:08,594 INFO L93 Difference]: Finished difference Result 2306 states and 3626 transitions. [2022-11-20 20:20:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:20:08,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-20 20:20:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:08,621 INFO L225 Difference]: With dead ends: 2306 [2022-11-20 20:20:08,622 INFO L226 Difference]: Without dead ends: 1124 [2022-11-20 20:20:08,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:20:08,645 INFO L413 NwaCegarLoop]: 1688 mSDtfsCounter, 5 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:08,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3373 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:20:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-20 20:20:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1119. [2022-11-20 20:20:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 828 states have (on average 1.4480676328502415) internal successors, (1199), 841 states have internal predecessors, (1199), 246 states have call successors, (246), 45 states have call predecessors, (246), 44 states have return successors, (243), 243 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-20 20:20:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1688 transitions. [2022-11-20 20:20:08,763 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1688 transitions. Word has length 14 [2022-11-20 20:20:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:08,763 INFO L495 AbstractCegarLoop]: Abstraction has 1119 states and 1688 transitions. [2022-11-20 20:20:08,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 20:20:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1688 transitions. [2022-11-20 20:20:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 20:20:08,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:08,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:08,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:08,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:08,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:08,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1748134867, now seen corresponding path program 1 times [2022-11-20 20:20:08,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:08,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767079689] [2022-11-20 20:20:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:08,986 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 20:20:08,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:08,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:08,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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)] Waiting until timeout for monitored process [2022-11-20 20:20:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:20:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:20:09,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:20:10,033 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:10,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767079689] [2022-11-20 20:20:10,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767079689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:10,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [157559259] [2022-11-20 20:20:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:10,034 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:20:10,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:20:10,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-20 20:20:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:10,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:20:10,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:20:11,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:11,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [157559259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:11,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:20:11,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-20 20:20:11,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461640358] [2022-11-20 20:20:11,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:11,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:20:11,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:11,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:20:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:20:11,507 INFO L87 Difference]: Start difference. First operand 1119 states and 1688 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 20:20:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:12,461 INFO L93 Difference]: Finished difference Result 1870 states and 2853 transitions. [2022-11-20 20:20:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:20:12,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-20 20:20:12,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:12,478 INFO L225 Difference]: With dead ends: 1870 [2022-11-20 20:20:12,478 INFO L226 Difference]: Without dead ends: 1863 [2022-11-20 20:20:12,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:20:12,481 INFO L413 NwaCegarLoop]: 1812 mSDtfsCounter, 1105 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 3486 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:12,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1105 Valid, 3486 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:20:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2022-11-20 20:20:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1862. [2022-11-20 20:20:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1417 states have (on average 1.4615384615384615) internal successors, (2071), 1440 states have internal predecessors, (2071), 369 states have call successors, (369), 78 states have call predecessors, (369), 75 states have return successors, (403), 358 states have call predecessors, (403), 366 states have call successors, (403) [2022-11-20 20:20:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2843 transitions. [2022-11-20 20:20:12,592 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2843 transitions. Word has length 18 [2022-11-20 20:20:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:12,592 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2843 transitions. [2022-11-20 20:20:12,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 20:20:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2843 transitions. [2022-11-20 20:20:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 20:20:12,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:12,602 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 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 20:20:12,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:12,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:13,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:13,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1777385822, now seen corresponding path program 1 times [2022-11-20 20:20:13,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:13,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842527807] [2022-11-20 20:20:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:13,031 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 20:20:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:13,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:13,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:13,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:20:13,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:20:14,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:20:14,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:14,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842527807] [2022-11-20 20:20:14,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842527807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [321461267] [2022-11-20 20:20:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:14,289 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:14,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:20:14,290 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:20:14,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-20 20:20:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:15,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:20:15,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:20:16,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:16,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [321461267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:16,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:20:16,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4] total 12 [2022-11-20 20:20:16,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775605877] [2022-11-20 20:20:16,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:16,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:20:16,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:16,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:20:16,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:20:16,653 INFO L87 Difference]: Start difference. First operand 1862 states and 2843 transitions. Second operand has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 20:20:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:20,422 INFO L93 Difference]: Finished difference Result 3712 states and 5672 transitions. [2022-11-20 20:20:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:20:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 82 [2022-11-20 20:20:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:20,437 INFO L225 Difference]: With dead ends: 3712 [2022-11-20 20:20:20,437 INFO L226 Difference]: Without dead ends: 1872 [2022-11-20 20:20:20,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:20:20,447 INFO L413 NwaCegarLoop]: 1676 mSDtfsCounter, 509 mSDsluCounter, 9337 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 11013 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:20,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 11013 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 20:20:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-11-20 20:20:20,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1870. [2022-11-20 20:20:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1422 states have (on average 1.459915611814346) internal successors, (2076), 1446 states have internal predecessors, (2076), 371 states have call successors, (371), 78 states have call predecessors, (371), 76 states have return successors, (406), 360 states have call predecessors, (406), 368 states have call successors, (406) [2022-11-20 20:20:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2853 transitions. [2022-11-20 20:20:20,566 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2853 transitions. Word has length 82 [2022-11-20 20:20:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:20,567 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2853 transitions. [2022-11-20 20:20:20,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 20:20:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2853 transitions. [2022-11-20 20:20:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 20:20:20,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:20,572 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 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 20:20:20,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:20,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:20,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:20,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1976689312, now seen corresponding path program 1 times [2022-11-20 20:20:20,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:20,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43322402] [2022-11-20 20:20:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:20,982 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 20:20:20,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:20,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:21,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:20:21,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:20:21,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:20:22,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:22,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43322402] [2022-11-20 20:20:22,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43322402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:22,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [440127777] [2022-11-20 20:20:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:22,137 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:20:22,138 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:20:22,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-20 20:20:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:24,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:20:24,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:20:24,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:20:24,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [440127777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:24,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980069909] [2022-11-20 20:20:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:24,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:24,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:24,318 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:24,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:20:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:25,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:20:25,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:20:25,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:20:25,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980069909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:25,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:20:25,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-11-20 20:20:25,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980638730] [2022-11-20 20:20:25,264 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:20:25,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:20:25,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:25,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:20:25,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:20:25,267 INFO L87 Difference]: Start difference. First operand 1870 states and 2853 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:20:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:20:25,997 INFO L93 Difference]: Finished difference Result 3755 states and 5732 transitions. [2022-11-20 20:20:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:20:25,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 79 [2022-11-20 20:20:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:20:26,010 INFO L225 Difference]: With dead ends: 3755 [2022-11-20 20:20:26,011 INFO L226 Difference]: Without dead ends: 1903 [2022-11-20 20:20:26,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:20:26,029 INFO L413 NwaCegarLoop]: 1689 mSDtfsCounter, 25 mSDsluCounter, 5043 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6732 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:20:26,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6732 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:20:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2022-11-20 20:20:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1903. [2022-11-20 20:20:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1450 states have (on average 1.4544827586206897) internal successors, (2109), 1473 states have internal predecessors, (2109), 376 states have call successors, (376), 78 states have call predecessors, (376), 76 states have return successors, (414), 366 states have call predecessors, (414), 373 states have call successors, (414) [2022-11-20 20:20:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2899 transitions. [2022-11-20 20:20:26,159 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2899 transitions. Word has length 79 [2022-11-20 20:20:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:20:26,161 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 2899 transitions. [2022-11-20 20:20:26,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:20:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2899 transitions. [2022-11-20 20:20:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 20:20:26,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:20:26,166 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:20:26,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:26,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:26,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:20:26,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:26,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:20:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:20:26,786 INFO L85 PathProgramCache]: Analyzing trace with hash 498514079, now seen corresponding path program 1 times [2022-11-20 20:20:26,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:20:26,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979965034] [2022-11-20 20:20:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:26,787 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 20:20:26,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:20:26,789 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:26,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:20:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:27,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:20:27,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:20:28,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:20:29,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:20:29,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979965034] [2022-11-20 20:20:29,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979965034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:29,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [371611671] [2022-11-20 20:20:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:29,137 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:20:29,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:20:29,139 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:20:29,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-20 20:20:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:30,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:20:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:20:31,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:20:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:20:31,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [371611671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:20:31,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525221220] [2022-11-20 20:20:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:20:31,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:20:31,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:20:31,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:20:31,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:20:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:20:32,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:20:32,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:20:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 20:20:34,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:20:34,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525221220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:20:34,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-20 20:20:34,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 7, 7] total 16 [2022-11-20 20:20:34,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007067480] [2022-11-20 20:20:34,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:20:34,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:20:34,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:20:34,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:20:34,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:20:34,826 INFO L87 Difference]: Start difference. First operand 1903 states and 2899 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 20:21:06,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:21:09,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:21:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:27,360 INFO L93 Difference]: Finished difference Result 3561 states and 5560 transitions. [2022-11-20 20:21:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:21:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-11-20 20:21:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:27,386 INFO L225 Difference]: With dead ends: 3561 [2022-11-20 20:21:27,386 INFO L226 Difference]: Without dead ends: 3558 [2022-11-20 20:21:27,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:21:27,389 INFO L413 NwaCegarLoop]: 1451 mSDtfsCounter, 3802 mSDsluCounter, 3965 mSDsCounter, 0 mSdLazyCounter, 4363 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3918 SdHoareTripleChecker+Valid, 5416 SdHoareTripleChecker+Invalid, 5662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:27,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3918 Valid, 5416 Invalid, 5662 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1299 Valid, 4363 Invalid, 0 Unknown, 0 Unchecked, 51.5s Time] [2022-11-20 20:21:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2022-11-20 20:21:27,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3443. [2022-11-20 20:21:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 2614 states have (on average 1.4495026778882938) internal successors, (3789), 2649 states have internal predecessors, (3789), 682 states have call successors, (682), 138 states have call predecessors, (682), 146 states have return successors, (903), 684 states have call predecessors, (903), 679 states have call successors, (903) [2022-11-20 20:21:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 5374 transitions. [2022-11-20 20:21:27,645 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 5374 transitions. Word has length 87 [2022-11-20 20:21:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:27,645 INFO L495 AbstractCegarLoop]: Abstraction has 3443 states and 5374 transitions. [2022-11-20 20:21:27,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 20:21:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 5374 transitions. [2022-11-20 20:21:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 20:21:27,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:27,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:21:27,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:27,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:28,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:28,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:28,271 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:28,271 INFO L85 PathProgramCache]: Analyzing trace with hash 86866640, now seen corresponding path program 1 times [2022-11-20 20:21:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:21:28,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794667078] [2022-11-20 20:21:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:28,274 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 20:21:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:21:28,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:28,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:21:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:30,855 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 20:21:30,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:21:30,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:21:30,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794667078] [2022-11-20 20:21:30,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794667078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:21:30,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:21:30,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:21:30,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34083478] [2022-11-20 20:21:30,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:21:30,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:21:30,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:21:30,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:21:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:21:30,860 INFO L87 Difference]: Start difference. First operand 3443 states and 5374 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-20 20:21:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:31,209 INFO L93 Difference]: Finished difference Result 6883 states and 10781 transitions. [2022-11-20 20:21:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:21:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 113 [2022-11-20 20:21:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:31,241 INFO L225 Difference]: With dead ends: 6883 [2022-11-20 20:21:31,241 INFO L226 Difference]: Without dead ends: 3449 [2022-11-20 20:21:31,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:21:31,262 INFO L413 NwaCegarLoop]: 1688 mSDtfsCounter, 38 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:31,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3329 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:21:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2022-11-20 20:21:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 3445. [2022-11-20 20:21:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 2615 states have (on average 1.4481835564053538) internal successors, (3787), 2651 states have internal predecessors, (3787), 682 states have call successors, (682), 138 states have call predecessors, (682), 147 states have return successors, (907), 684 states have call predecessors, (907), 679 states have call successors, (907) [2022-11-20 20:21:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 5376 transitions. [2022-11-20 20:21:31,496 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 5376 transitions. Word has length 113 [2022-11-20 20:21:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:31,497 INFO L495 AbstractCegarLoop]: Abstraction has 3445 states and 5376 transitions. [2022-11-20 20:21:31,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-20 20:21:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 5376 transitions. [2022-11-20 20:21:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 20:21:31,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:31,503 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:21:31,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:31,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:31,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:31,725 INFO L85 PathProgramCache]: Analyzing trace with hash 552974234, now seen corresponding path program 1 times [2022-11-20 20:21:31,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:21:31,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307971744] [2022-11-20 20:21:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:31,726 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 20:21:31,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:21:31,727 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:31,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:32,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:21:32,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:21:33,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:21:34,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:21:34,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307971744] [2022-11-20 20:21:34,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307971744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:34,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1988556067] [2022-11-20 20:21:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:34,229 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:34,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:21:34,230 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:21:34,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-20 20:21:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:35,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:21:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 20:21:36,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:21:36,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1988556067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:21:36,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:21:36,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 13 [2022-11-20 20:21:36,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569755866] [2022-11-20 20:21:36,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:21:36,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:21:36,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:21:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:21:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:21:36,363 INFO L87 Difference]: Start difference. First operand 3445 states and 5376 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-20 20:21:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:36,645 INFO L93 Difference]: Finished difference Result 3447 states and 5377 transitions. [2022-11-20 20:21:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:21:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-11-20 20:21:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:36,671 INFO L225 Difference]: With dead ends: 3447 [2022-11-20 20:21:36,671 INFO L226 Difference]: Without dead ends: 3444 [2022-11-20 20:21:36,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:21:36,675 INFO L413 NwaCegarLoop]: 1682 mSDtfsCounter, 1640 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:36,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1640 Valid, 1682 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:21:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2022-11-20 20:21:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3432. [2022-11-20 20:21:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 2611 states have (on average 1.4481041746457297) internal successors, (3781), 2641 states have internal predecessors, (3781), 673 states have call successors, (673), 136 states have call predecessors, (673), 147 states have return successors, (898), 683 states have call predecessors, (898), 671 states have call successors, (898) [2022-11-20 20:21:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 5352 transitions. [2022-11-20 20:21:37,023 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 5352 transitions. Word has length 108 [2022-11-20 20:21:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:37,023 INFO L495 AbstractCegarLoop]: Abstraction has 3432 states and 5352 transitions. [2022-11-20 20:21:37,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-20 20:21:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 5352 transitions. [2022-11-20 20:21:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-20 20:21:37,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:37,033 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:21:37,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:37,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:37,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:37,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:37,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2054781357, now seen corresponding path program 1 times [2022-11-20 20:21:37,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:21:37,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73560246] [2022-11-20 20:21:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:37,447 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 20:21:37,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:21:37,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:37,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:21:38,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 20:21:38,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:21:40,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:21:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73560246] [2022-11-20 20:21:40,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73560246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:40,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1267391547] [2022-11-20 20:21:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:40,030 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:40,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:21:40,031 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:21:40,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-20 20:21:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:21:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 20:21:42,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:21:42,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1267391547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117512000] [2022-11-20 20:21:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:42,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:42,991 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:43,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 20:21:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:21:43,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 20:21:44,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:21:44,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117512000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:21:44,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-20 20:21:44,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7, 7, 7] total 13 [2022-11-20 20:21:44,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839971645] [2022-11-20 20:21:44,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:21:44,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:21:44,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:21:44,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:21:44,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:21:44,030 INFO L87 Difference]: Start difference. First operand 3432 states and 5352 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-20 20:21:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:44,355 INFO L93 Difference]: Finished difference Result 3456 states and 5388 transitions. [2022-11-20 20:21:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:21:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 139 [2022-11-20 20:21:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:44,375 INFO L225 Difference]: With dead ends: 3456 [2022-11-20 20:21:44,375 INFO L226 Difference]: Without dead ends: 3450 [2022-11-20 20:21:44,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:21:44,379 INFO L413 NwaCegarLoop]: 1682 mSDtfsCounter, 5 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:44,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3360 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:21:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2022-11-20 20:21:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3434. [2022-11-20 20:21:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 2613 states have (on average 1.4477611940298507) internal successors, (3783), 2643 states have internal predecessors, (3783), 673 states have call successors, (673), 136 states have call predecessors, (673), 147 states have return successors, (898), 683 states have call predecessors, (898), 671 states have call successors, (898) [2022-11-20 20:21:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 5354 transitions. [2022-11-20 20:21:44,635 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 5354 transitions. Word has length 139 [2022-11-20 20:21:44,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:44,637 INFO L495 AbstractCegarLoop]: Abstraction has 3434 states and 5354 transitions. [2022-11-20 20:21:44,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-20 20:21:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 5354 transitions. [2022-11-20 20:21:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:21:44,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:44,650 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:21:44,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:44,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:45,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:45,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:45,269 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1982737979, now seen corresponding path program 1 times [2022-11-20 20:21:45,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:21:45,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740795681] [2022-11-20 20:21:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:45,271 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 20:21:45,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:21:45,272 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:45,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:21:46,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:21:47,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:21:48,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:21:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740795681] [2022-11-20 20:21:48,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740795681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [324596195] [2022-11-20 20:21:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:48,165 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:48,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:21:48,166 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:21:48,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-20 20:21:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:50,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:21:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:21:50,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:21:51,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [324596195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:51,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128658081] [2022-11-20 20:21:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:51,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:51,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:51,082 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:51,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 20:21:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:21:51,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 20:21:52,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 20:21:53,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128658081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:53,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:21:53,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 4, 4] total 16 [2022-11-20 20:21:53,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814533681] [2022-11-20 20:21:53,379 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:21:53,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 20:21:53,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:21:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 20:21:53,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:21:53,381 INFO L87 Difference]: Start difference. First operand 3434 states and 5354 transitions. Second operand has 16 states, 16 states have (on average 14.0) internal successors, (224), 16 states have internal predecessors, (224), 4 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2022-11-20 20:21:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:58,751 INFO L93 Difference]: Finished difference Result 6988 states and 10941 transitions. [2022-11-20 20:21:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:21:58,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.0) internal successors, (224), 16 states have internal predecessors, (224), 4 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 143 [2022-11-20 20:21:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:58,792 INFO L225 Difference]: With dead ends: 6988 [2022-11-20 20:21:58,792 INFO L226 Difference]: Without dead ends: 3626 [2022-11-20 20:21:58,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:21:58,811 INFO L413 NwaCegarLoop]: 1705 mSDtfsCounter, 111 mSDsluCounter, 16922 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 18627 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:58,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 18627 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 20:21:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2022-11-20 20:21:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 3626. [2022-11-20 20:21:59,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 2776 states have (on average 1.4362391930835734) internal successors, (3987), 2805 states have internal predecessors, (3987), 702 states have call successors, (702), 136 states have call predecessors, (702), 147 states have return successors, (971), 713 states have call predecessors, (971), 700 states have call successors, (971) [2022-11-20 20:21:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 5660 transitions. [2022-11-20 20:21:59,102 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 5660 transitions. Word has length 143 [2022-11-20 20:21:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:59,102 INFO L495 AbstractCegarLoop]: Abstraction has 3626 states and 5660 transitions. [2022-11-20 20:21:59,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.0) internal successors, (224), 16 states have internal predecessors, (224), 4 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2022-11-20 20:21:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 5660 transitions. [2022-11-20 20:21:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-20 20:21:59,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:59,117 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:21:59,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:59,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:59,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:59,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:21:59,738 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash 295059361, now seen corresponding path program 1 times [2022-11-20 20:21:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:21:59,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438479828] [2022-11-20 20:21:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:59,741 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 20:21:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:21:59,742 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:21:59,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:22:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 20:22:04,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:22:08,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:08,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438479828] [2022-11-20 20:22:08,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438479828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:08,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [173106111] [2022-11-20 20:22:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:08,419 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:08,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:08,420 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:08,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-20 20:22:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 2773 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:22:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-11-20 20:22:12,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:12,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [173106111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:12,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:22:12,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13, 13] total 26 [2022-11-20 20:22:12,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797274611] [2022-11-20 20:22:12,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:12,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:22:12,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:12,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:22:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:22:12,254 INFO L87 Difference]: Start difference. First operand 3626 states and 5660 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 20:22:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:13,255 INFO L93 Difference]: Finished difference Result 7241 states and 11319 transitions. [2022-11-20 20:22:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:22:13,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 191 [2022-11-20 20:22:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:13,281 INFO L225 Difference]: With dead ends: 7241 [2022-11-20 20:22:13,281 INFO L226 Difference]: Without dead ends: 3636 [2022-11-20 20:22:13,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:22:13,310 INFO L413 NwaCegarLoop]: 1677 mSDtfsCounter, 84 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 4899 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:13,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 4899 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:22:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2022-11-20 20:22:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 3636. [2022-11-20 20:22:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 2784 states have (on average 1.434985632183908) internal successors, (3995), 2812 states have internal predecessors, (3995), 702 states have call successors, (702), 139 states have call predecessors, (702), 149 states have return successors, (957), 713 states have call predecessors, (957), 700 states have call successors, (957) [2022-11-20 20:22:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 5654 transitions. [2022-11-20 20:22:13,597 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 5654 transitions. Word has length 191 [2022-11-20 20:22:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:13,597 INFO L495 AbstractCegarLoop]: Abstraction has 3636 states and 5654 transitions. [2022-11-20 20:22:13,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 20:22:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 5654 transitions. [2022-11-20 20:22:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-20 20:22:13,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:13,609 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:13,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:13,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:14,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:14,033 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:14,033 INFO L85 PathProgramCache]: Analyzing trace with hash -453343719, now seen corresponding path program 1 times [2022-11-20 20:22:14,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:14,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282077677] [2022-11-20 20:22:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:14,035 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 20:22:14,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:14,037 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:14,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:17,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:22:17,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-20 20:22:18,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:18,155 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:18,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282077677] [2022-11-20 20:22:18,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282077677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:18,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:18,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:22:18,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654568726] [2022-11-20 20:22:18,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:18,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:22:18,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:22:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:22:18,158 INFO L87 Difference]: Start difference. First operand 3636 states and 5654 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 6 states have internal predecessors, (97), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:22:21,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:22:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:22,194 INFO L93 Difference]: Finished difference Result 7298 states and 11438 transitions. [2022-11-20 20:22:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:22:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 6 states have internal predecessors, (97), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) Word has length 179 [2022-11-20 20:22:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:22,219 INFO L225 Difference]: With dead ends: 7298 [2022-11-20 20:22:22,219 INFO L226 Difference]: Without dead ends: 3671 [2022-11-20 20:22:22,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:22,298 INFO L413 NwaCegarLoop]: 1680 mSDtfsCounter, 5 mSDsluCounter, 10052 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11732 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:22,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11732 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 20:22:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2022-11-20 20:22:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3662. [2022-11-20 20:22:22,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3662 states, 2803 states have (on average 1.4320371031038173) internal successors, (4014), 2832 states have internal predecessors, (4014), 702 states have call successors, (702), 139 states have call predecessors, (702), 156 states have return successors, (984), 719 states have call predecessors, (984), 700 states have call successors, (984) [2022-11-20 20:22:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3662 states to 3662 states and 5700 transitions. [2022-11-20 20:22:22,569 INFO L78 Accepts]: Start accepts. Automaton has 3662 states and 5700 transitions. Word has length 179 [2022-11-20 20:22:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:22,570 INFO L495 AbstractCegarLoop]: Abstraction has 3662 states and 5700 transitions. [2022-11-20 20:22:22,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 6 states have internal predecessors, (97), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:22:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3662 states and 5700 transitions. [2022-11-20 20:22:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-20 20:22:22,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:22,580 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:22,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:22,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:22,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash -153959961, now seen corresponding path program 1 times [2022-11-20 20:22:22,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:22,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854221069] [2022-11-20 20:22:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:22,800 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 20:22:22,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:22,801 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:22,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:26,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:22:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-20 20:22:26,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:26,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:26,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854221069] [2022-11-20 20:22:26,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854221069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:26,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:22:26,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:22:26,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952534727] [2022-11-20 20:22:26,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:26,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:26,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:26,147 INFO L87 Difference]: Start difference. First operand 3662 states and 5700 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:22:28,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:22:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:28,595 INFO L93 Difference]: Finished difference Result 7321 states and 11461 transitions. [2022-11-20 20:22:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:29,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 182 [2022-11-20 20:22:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:29,291 INFO L225 Difference]: With dead ends: 7321 [2022-11-20 20:22:29,291 INFO L226 Difference]: Without dead ends: 3668 [2022-11-20 20:22:29,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:22:29,312 INFO L413 NwaCegarLoop]: 1682 mSDtfsCounter, 1 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:29,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3361 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 20:22:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2022-11-20 20:22:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 3665. [2022-11-20 20:22:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 2806 states have (on average 1.4315751960085532) internal successors, (4017), 2835 states have internal predecessors, (4017), 702 states have call successors, (702), 139 states have call predecessors, (702), 156 states have return successors, (984), 719 states have call predecessors, (984), 700 states have call successors, (984) [2022-11-20 20:22:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 5703 transitions. [2022-11-20 20:22:29,645 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 5703 transitions. Word has length 182 [2022-11-20 20:22:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:29,646 INFO L495 AbstractCegarLoop]: Abstraction has 3665 states and 5703 transitions. [2022-11-20 20:22:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:22:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 5703 transitions. [2022-11-20 20:22:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-20 20:22:29,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:29,658 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:29,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:29,872 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1578424139, now seen corresponding path program 1 times [2022-11-20 20:22:29,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:29,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164392823] [2022-11-20 20:22:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:29,875 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 20:22:29,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:29,876 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:29,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:33,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 2792 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:22:33,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-20 20:22:33,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-20 20:22:34,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164392823] [2022-11-20 20:22:34,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164392823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:34,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779809678] [2022-11-20 20:22:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:34,388 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:34,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-20 20:22:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 2792 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:22:37,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-20 20:22:38,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:38,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779809678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:38,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:22:38,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 9 [2022-11-20 20:22:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476005511] [2022-11-20 20:22:38,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:38,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:22:38,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:22:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:38,367 INFO L87 Difference]: Start difference. First operand 3665 states and 5703 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:22:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:39,543 INFO L93 Difference]: Finished difference Result 6627 states and 10373 transitions. [2022-11-20 20:22:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:22:39,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 184 [2022-11-20 20:22:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:39,563 INFO L225 Difference]: With dead ends: 6627 [2022-11-20 20:22:39,563 INFO L226 Difference]: Without dead ends: 3791 [2022-11-20 20:22:39,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:22:39,578 INFO L413 NwaCegarLoop]: 1778 mSDtfsCounter, 55 mSDsluCounter, 5206 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6984 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:39,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6984 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:22:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3791 states. [2022-11-20 20:22:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3791 to 3673. [2022-11-20 20:22:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 2812 states have (on average 1.4306543385490753) internal successors, (4023), 2841 states have internal predecessors, (4023), 702 states have call successors, (702), 139 states have call predecessors, (702), 158 states have return successors, (1014), 721 states have call predecessors, (1014), 700 states have call successors, (1014) [2022-11-20 20:22:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 5739 transitions. [2022-11-20 20:22:39,962 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 5739 transitions. Word has length 184 [2022-11-20 20:22:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:39,963 INFO L495 AbstractCegarLoop]: Abstraction has 3673 states and 5739 transitions. [2022-11-20 20:22:39,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-20 20:22:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 5739 transitions. [2022-11-20 20:22:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-20 20:22:39,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:39,983 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:40,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:40,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:40,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:40,409 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1633817724, now seen corresponding path program 1 times [2022-11-20 20:22:40,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:40,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164995382] [2022-11-20 20:22:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:40,411 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 20:22:40,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:40,412 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:40,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:41,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:22:41,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:22:46,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:22:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:22:53,606 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:53,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164995382] [2022-11-20 20:22:53,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164995382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:53,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [344621909] [2022-11-20 20:22:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:53,607 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:53,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:53,608 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:53,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-20 20:22:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:55,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:22:55,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:22:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-20 20:22:56,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:22:56,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [344621909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:22:56,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:22:56,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13, 13] total 25 [2022-11-20 20:22:56,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138114273] [2022-11-20 20:22:56,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:22:56,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:22:56,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:22:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:22:56,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:22:56,521 INFO L87 Difference]: Start difference. First operand 3673 states and 5739 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:22:56,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:22:56,883 INFO L93 Difference]: Finished difference Result 7154 states and 11184 transitions. [2022-11-20 20:22:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:22:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 170 [2022-11-20 20:22:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:22:56,905 INFO L225 Difference]: With dead ends: 7154 [2022-11-20 20:22:56,906 INFO L226 Difference]: Without dead ends: 3673 [2022-11-20 20:22:56,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:22:56,921 INFO L413 NwaCegarLoop]: 1678 mSDtfsCounter, 0 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3349 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:22:56,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3349 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:22:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2022-11-20 20:22:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 3673. [2022-11-20 20:22:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 2812 states have (on average 1.4274537695590328) internal successors, (4014), 2841 states have internal predecessors, (4014), 702 states have call successors, (702), 139 states have call predecessors, (702), 158 states have return successors, (1014), 721 states have call predecessors, (1014), 700 states have call successors, (1014) [2022-11-20 20:22:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 5730 transitions. [2022-11-20 20:22:57,264 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 5730 transitions. Word has length 170 [2022-11-20 20:22:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:22:57,264 INFO L495 AbstractCegarLoop]: Abstraction has 3673 states and 5730 transitions. [2022-11-20 20:22:57,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 20:22:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 5730 transitions. [2022-11-20 20:22:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-20 20:22:57,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:22:57,275 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:22:57,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-20 20:22:57,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:57,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:57,690 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:22:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:22:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1638946931, now seen corresponding path program 1 times [2022-11-20 20:22:57,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:22:57,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315403114] [2022-11-20 20:22:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:22:57,692 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 20:22:57,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:22:57,694 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:22:57,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 (30)] Waiting until timeout for monitored process [2022-11-20 20:22:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:22:59,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:22:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:23:03,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 20:23:11,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:11,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315403114] [2022-11-20 20:23:11,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315403114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:11,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1856733244] [2022-11-20 20:23:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:11,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:23:11,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:23:11,279 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:23:11,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-20 20:23:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:23:14,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:23:16,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 20:23:18,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1856733244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:18,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90622366] [2022-11-20 20:23:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:18,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:23:18,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:23:18,034 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:23:18,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 20:23:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:19,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:23:19,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-11-20 20:23:21,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-11-20 20:23:22,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90622366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:22,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:23:22,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 4, 4] total 28 [2022-11-20 20:23:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913454554] [2022-11-20 20:23:22,986 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:23:22,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 20:23:22,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:23:22,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 20:23:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:23:22,988 INFO L87 Difference]: Start difference. First operand 3673 states and 5730 transitions. Second operand has 28 states, 28 states have (on average 9.75) internal successors, (273), 28 states have internal predecessors, (273), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-20 20:23:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:23:50,966 INFO L93 Difference]: Finished difference Result 7431 states and 11630 transitions. [2022-11-20 20:23:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 20:23:50,968 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 9.75) internal successors, (273), 28 states have internal predecessors, (273), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 179 [2022-11-20 20:23:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:23:50,989 INFO L225 Difference]: With dead ends: 7431 [2022-11-20 20:23:50,989 INFO L226 Difference]: Without dead ends: 3944 [2022-11-20 20:23:51,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 1052 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=424, Invalid=1058, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 20:23:51,007 INFO L413 NwaCegarLoop]: 1730 mSDtfsCounter, 297 mSDsluCounter, 23919 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 25649 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:23:51,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 25649 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 19.8s Time] [2022-11-20 20:23:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2022-11-20 20:23:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 3925. [2022-11-20 20:23:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3022 states have (on average 1.411647915287889) internal successors, (4266), 3051 states have internal predecessors, (4266), 744 states have call successors, (744), 139 states have call predecessors, (744), 158 states have return successors, (1116), 763 states have call predecessors, (1116), 742 states have call successors, (1116) [2022-11-20 20:23:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 6126 transitions. [2022-11-20 20:23:51,319 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 6126 transitions. Word has length 179 [2022-11-20 20:23:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:23:51,320 INFO L495 AbstractCegarLoop]: Abstraction has 3925 states and 6126 transitions. [2022-11-20 20:23:51,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.75) internal successors, (273), 28 states have internal predecessors, (273), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-20 20:23:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 6126 transitions. [2022-11-20 20:23:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 20:23:51,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:23:51,329 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:51,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:51,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:51,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 (30)] Forceful destruction successful, exit code 0 [2022-11-20 20:23:51,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:23:51,952 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:23:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:23:51,953 INFO L85 PathProgramCache]: Analyzing trace with hash 196848704, now seen corresponding path program 1 times [2022-11-20 20:23:51,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:23:51,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371098894] [2022-11-20 20:23:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:51,956 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 20:23:51,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:23:51,958 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:23:52,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:23:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:23:55,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:23:55,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 983 trivial. 0 not checked. [2022-11-20 20:23:56,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:23:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-11-20 20:23:57,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:23:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371098894] [2022-11-20 20:23:57,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371098894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:23:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [500835471] [2022-11-20 20:23:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:23:57,130 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:23:57,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:23:57,133 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:23:57,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-20 20:24:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:00,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:24:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2022-11-20 20:24:01,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:24:01,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [500835471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:24:01,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:24:01,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 9 [2022-11-20 20:24:01,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786939118] [2022-11-20 20:24:01,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:24:01,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:24:01,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:01,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:24:01,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:24:01,470 INFO L87 Difference]: Start difference. First operand 3925 states and 6126 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 20:24:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:02,973 INFO L93 Difference]: Finished difference Result 7071 states and 11130 transitions. [2022-11-20 20:24:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:24:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 286 [2022-11-20 20:24:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:02,999 INFO L225 Difference]: With dead ends: 7071 [2022-11-20 20:24:02,999 INFO L226 Difference]: Without dead ends: 4047 [2022-11-20 20:24:03,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 848 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:24:03,019 INFO L413 NwaCegarLoop]: 1777 mSDtfsCounter, 54 mSDsluCounter, 5199 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6976 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:03,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6976 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:24:03,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2022-11-20 20:24:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3929. [2022-11-20 20:24:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3026 states have (on average 1.4111037673496365) internal successors, (4270), 3053 states have internal predecessors, (4270), 744 states have call successors, (744), 139 states have call predecessors, (744), 158 states have return successors, (1116), 765 states have call predecessors, (1116), 742 states have call successors, (1116) [2022-11-20 20:24:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 6130 transitions. [2022-11-20 20:24:03,470 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 6130 transitions. Word has length 286 [2022-11-20 20:24:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:03,471 INFO L495 AbstractCegarLoop]: Abstraction has 3929 states and 6130 transitions. [2022-11-20 20:24:03,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-20 20:24:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 6130 transitions. [2022-11-20 20:24:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-20 20:24:03,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:03,480 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:24:03,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:03,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:03,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:03,905 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:03,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:03,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1396521745, now seen corresponding path program 1 times [2022-11-20 20:24:03,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:03,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699071344] [2022-11-20 20:24:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:03,908 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 20:24:03,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:03,910 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:03,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:07,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2898 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:24:07,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-11-20 20:24:08,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-11-20 20:24:08,861 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:08,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699071344] [2022-11-20 20:24:08,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699071344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:08,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605074488] [2022-11-20 20:24:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:08,862 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:08,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:08,863 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:08,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-20 20:24:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:12,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2898 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:24:12,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2022-11-20 20:24:13,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:24:13,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605074488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:24:13,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:24:13,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-20 20:24:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696969536] [2022-11-20 20:24:13,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:24:13,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:24:13,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:24:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:24:13,040 INFO L87 Difference]: Start difference. First operand 3929 states and 6130 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-20 20:24:13,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:13,577 INFO L93 Difference]: Finished difference Result 3934 states and 6134 transitions. [2022-11-20 20:24:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:24:13,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 250 [2022-11-20 20:24:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:13,595 INFO L225 Difference]: With dead ends: 3934 [2022-11-20 20:24:13,595 INFO L226 Difference]: Without dead ends: 3929 [2022-11-20 20:24:13,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 741 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:24:13,599 INFO L413 NwaCegarLoop]: 1678 mSDtfsCounter, 75 mSDsluCounter, 3265 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 4943 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:13,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 4943 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:24:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2022-11-20 20:24:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3929. [2022-11-20 20:24:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3026 states have (on average 1.41044282881692) internal successors, (4268), 3053 states have internal predecessors, (4268), 744 states have call successors, (744), 139 states have call predecessors, (744), 158 states have return successors, (1116), 765 states have call predecessors, (1116), 742 states have call successors, (1116) [2022-11-20 20:24:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 6128 transitions. [2022-11-20 20:24:13,888 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 6128 transitions. Word has length 250 [2022-11-20 20:24:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:13,889 INFO L495 AbstractCegarLoop]: Abstraction has 3929 states and 6128 transitions. [2022-11-20 20:24:13,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-20 20:24:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 6128 transitions. [2022-11-20 20:24:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-20 20:24:13,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:13,900 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:24:13,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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)] Ended with exit code 0 [2022-11-20 20:24:14,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:14,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:14,317 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash -901767059, now seen corresponding path program 1 times [2022-11-20 20:24:14,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:14,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500579017] [2022-11-20 20:24:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:14,319 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 20:24:14,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:14,320 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:14,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:24:17,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-20 20:24:18,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-20 20:24:18,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:18,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500579017] [2022-11-20 20:24:18,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500579017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:18,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [627114729] [2022-11-20 20:24:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:18,767 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:18,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:18,768 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:18,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-20 20:24:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:22,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:24:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-20 20:24:25,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:24:25,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [627114729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:24:25,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:24:25,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4] total 12 [2022-11-20 20:24:25,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627710345] [2022-11-20 20:24:25,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:24:25,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:24:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:24:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:24:25,395 INFO L87 Difference]: Start difference. First operand 3929 states and 6128 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-20 20:24:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:26,905 INFO L93 Difference]: Finished difference Result 6981 states and 11047 transitions. [2022-11-20 20:24:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:24:26,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 226 [2022-11-20 20:24:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:26,926 INFO L225 Difference]: With dead ends: 6981 [2022-11-20 20:24:26,927 INFO L226 Difference]: Without dead ends: 3953 [2022-11-20 20:24:26,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:24:26,943 INFO L413 NwaCegarLoop]: 1684 mSDtfsCounter, 5 mSDsluCounter, 10084 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11768 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:26,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 11768 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:24:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2022-11-20 20:24:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 3948. [2022-11-20 20:24:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3948 states, 3039 states have (on average 1.4086870681145114) internal successors, (4281), 3066 states have internal predecessors, (4281), 746 states have call successors, (746), 139 states have call predecessors, (746), 162 states have return successors, (1140), 771 states have call predecessors, (1140), 744 states have call successors, (1140) [2022-11-20 20:24:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3948 states to 3948 states and 6167 transitions. [2022-11-20 20:24:27,330 INFO L78 Accepts]: Start accepts. Automaton has 3948 states and 6167 transitions. Word has length 226 [2022-11-20 20:24:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:27,331 INFO L495 AbstractCegarLoop]: Abstraction has 3948 states and 6167 transitions. [2022-11-20 20:24:27,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-20 20:24:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3948 states and 6167 transitions. [2022-11-20 20:24:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-20 20:24:27,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:27,341 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:24:27,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:27,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:27,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:27,757 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash -645627852, now seen corresponding path program 1 times [2022-11-20 20:24:27,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:27,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469036487] [2022-11-20 20:24:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:27,760 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 20:24:27,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:27,762 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:27,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:31,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:24:31,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-20 20:24:32,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-20 20:24:32,617 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:32,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469036487] [2022-11-20 20:24:32,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469036487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:32,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824955603] [2022-11-20 20:24:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:24:32,618 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:32,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:32,619 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:32,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-20 20:24:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:24:36,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:24:36,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 20:24:40,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:24:40,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1824955603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:24:40,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:24:40,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 13 [2022-11-20 20:24:40,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236017864] [2022-11-20 20:24:40,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:24:40,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:24:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:24:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:24:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:24:40,189 INFO L87 Difference]: Start difference. First operand 3948 states and 6167 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (33), 2 states have call predecessors, (33), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-20 20:24:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:24:41,709 INFO L93 Difference]: Finished difference Result 7024 states and 11125 transitions. [2022-11-20 20:24:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:24:41,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (33), 2 states have call predecessors, (33), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) Word has length 217 [2022-11-20 20:24:41,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:24:41,731 INFO L225 Difference]: With dead ends: 7024 [2022-11-20 20:24:41,731 INFO L226 Difference]: Without dead ends: 3977 [2022-11-20 20:24:41,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:24:41,747 INFO L413 NwaCegarLoop]: 1688 mSDtfsCounter, 3 mSDsluCounter, 11794 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13482 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:24:41,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 13482 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 20:24:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2022-11-20 20:24:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 3966. [2022-11-20 20:24:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3966 states, 3051 states have (on average 1.407079646017699) internal successors, (4293), 3077 states have internal predecessors, (4293), 748 states have call successors, (748), 139 states have call predecessors, (748), 166 states have return successors, (1158), 778 states have call predecessors, (1158), 746 states have call successors, (1158) [2022-11-20 20:24:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3966 states to 3966 states and 6199 transitions. [2022-11-20 20:24:42,101 INFO L78 Accepts]: Start accepts. Automaton has 3966 states and 6199 transitions. Word has length 217 [2022-11-20 20:24:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:24:42,102 INFO L495 AbstractCegarLoop]: Abstraction has 3966 states and 6199 transitions. [2022-11-20 20:24:42,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (33), 2 states have call predecessors, (33), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-20 20:24:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3966 states and 6199 transitions. [2022-11-20 20:24:42,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-20 20:24:42,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:24:42,115 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:24:42,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-20 20:24:42,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:42,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:42,537 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:24:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:24:42,537 INFO L85 PathProgramCache]: Analyzing trace with hash -797702738, now seen corresponding path program 2 times [2022-11-20 20:24:42,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:24:42,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652256469] [2022-11-20 20:24:42,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:42,540 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 20:24:42,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:24:42,541 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:24:42,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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)] Waiting until timeout for monitored process [2022-11-20 20:24:52,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:24:52,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:24:52,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:24:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:24:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-20 20:24:53,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-11-20 20:24:53,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:24:53,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652256469] [2022-11-20 20:24:53,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652256469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:24:53,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634380596] [2022-11-20 20:24:53,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:24:53,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:24:53,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:24:53,504 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:24:53,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-20 20:25:10,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:25:10,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:25:10,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:25:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 20:25:15,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:25:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-20 20:25:28,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634380596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:25:28,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668170081] [2022-11-20 20:25:28,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:25:28,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:28,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:28,480 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:28,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 20:25:37,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:25:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:25:37,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:25:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 20:25:39,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:25:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-20 20:25:46,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668170081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:25:46,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:25:46,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 11, 11, 11, 11] total 24 [2022-11-20 20:25:46,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223277469] [2022-11-20 20:25:46,707 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:25:46,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:25:46,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:25:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:25:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:25:46,710 INFO L87 Difference]: Start difference. First operand 3966 states and 6199 transitions. Second operand has 24 states, 24 states have (on average 7.083333333333333) internal successors, (170), 16 states have internal predecessors, (170), 4 states have call successors, (58), 2 states have call predecessors, (58), 10 states have return successors, (54), 12 states have call predecessors, (54), 4 states have call successors, (54) [2022-11-20 20:25:52,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:25:54,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:25:58,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:58,505 INFO L93 Difference]: Finished difference Result 7995 states and 12886 transitions. [2022-11-20 20:25:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:25:58,506 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.083333333333333) internal successors, (170), 16 states have internal predecessors, (170), 4 states have call successors, (58), 2 states have call predecessors, (58), 10 states have return successors, (54), 12 states have call predecessors, (54), 4 states have call successors, (54) Word has length 228 [2022-11-20 20:25:58,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:58,523 INFO L225 Difference]: With dead ends: 7995 [2022-11-20 20:25:58,523 INFO L226 Difference]: Without dead ends: 4038 [2022-11-20 20:25:58,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1363 GetRequests, 1340 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:25:58,544 INFO L413 NwaCegarLoop]: 1691 mSDtfsCounter, 8 mSDsluCounter, 25278 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26969 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:58,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26969 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 2 Unknown, 0 Unchecked, 10.9s Time] [2022-11-20 20:25:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2022-11-20 20:25:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 4023. [2022-11-20 20:25:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4023 states, 3095 states have (on average 1.401292407108239) internal successors, (4337), 3118 states have internal predecessors, (4337), 754 states have call successors, (754), 139 states have call predecessors, (754), 173 states have return successors, (1208), 794 states have call predecessors, (1208), 752 states have call successors, (1208) [2022-11-20 20:25:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4023 states to 4023 states and 6299 transitions. [2022-11-20 20:25:58,832 INFO L78 Accepts]: Start accepts. Automaton has 4023 states and 6299 transitions. Word has length 228 [2022-11-20 20:25:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:58,833 INFO L495 AbstractCegarLoop]: Abstraction has 4023 states and 6299 transitions. [2022-11-20 20:25:58,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.083333333333333) internal successors, (170), 16 states have internal predecessors, (170), 4 states have call successors, (58), 2 states have call predecessors, (58), 10 states have return successors, (54), 12 states have call predecessors, (54), 4 states have call successors, (54) [2022-11-20 20:25:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4023 states and 6299 transitions. [2022-11-20 20:25:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-20 20:25:58,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:58,842 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:25:58,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:59,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:59,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:59,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:25:59,468 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:59,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash 421533029, now seen corresponding path program 3 times [2022-11-20 20:25:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:25:59,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830624855] [2022-11-20 20:25:59,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:25:59,472 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 20:25:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:25:59,472 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:25:59,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:26:08,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:26:08,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:26:08,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:26:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-11-20 20:26:08,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:26:08,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:26:08,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830624855] [2022-11-20 20:26:08,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830624855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:26:08,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:26:08,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:26:08,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494574190] [2022-11-20 20:26:08,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:26:08,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:26:08,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:26:08,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:26:08,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:26:08,620 INFO L87 Difference]: Start difference. First operand 4023 states and 6299 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-20 20:26:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:09,323 INFO L93 Difference]: Finished difference Result 7916 states and 12781 transitions. [2022-11-20 20:26:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:26:09,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 244 [2022-11-20 20:26:09,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:09,340 INFO L225 Difference]: With dead ends: 7916 [2022-11-20 20:26:09,341 INFO L226 Difference]: Without dead ends: 4027 [2022-11-20 20:26:09,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:26:09,365 INFO L413 NwaCegarLoop]: 1678 mSDtfsCounter, 2 mSDsluCounter, 3349 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5027 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:09,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5027 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:26:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4027 states. [2022-11-20 20:26:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4027 to 4027. [2022-11-20 20:26:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4027 states, 3099 states have (on average 1.4007744433688287) internal successors, (4341), 3122 states have internal predecessors, (4341), 754 states have call successors, (754), 139 states have call predecessors, (754), 173 states have return successors, (1208), 794 states have call predecessors, (1208), 752 states have call successors, (1208) [2022-11-20 20:26:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 6303 transitions. [2022-11-20 20:26:09,725 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 6303 transitions. Word has length 244 [2022-11-20 20:26:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:09,726 INFO L495 AbstractCegarLoop]: Abstraction has 4027 states and 6303 transitions. [2022-11-20 20:26:09,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-20 20:26:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 6303 transitions. [2022-11-20 20:26:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-20 20:26:09,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:09,735 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:09,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:26:09,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:26:09,962 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:09,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2073725977, now seen corresponding path program 1 times [2022-11-20 20:26:09,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:26:09,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116009852] [2022-11-20 20:26:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:09,966 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 20:26:09,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:26:09,973 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:26:09,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:26:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:14,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:26:14,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 44 proven. 16 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-20 20:26:16,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:26:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2022-11-20 20:26:18,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:26:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116009852] [2022-11-20 20:26:18,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116009852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:26:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1042834905] [2022-11-20 20:26:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:18,220 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:26:18,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:26:18,221 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:26:18,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-20 20:26:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:26:23,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-20 20:26:31,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:26:31,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1042834905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:26:31,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:26:31,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 7] total 21 [2022-11-20 20:26:31,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658235128] [2022-11-20 20:26:31,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:26:31,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 20:26:31,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:26:31,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 20:26:31,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:26:31,015 INFO L87 Difference]: Start difference. First operand 4027 states and 6303 transitions. Second operand has 11 states, 11 states have (on average 11.0) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (31), 2 states have call predecessors, (31), 6 states have return successors, (27), 6 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-20 20:26:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:33,639 INFO L93 Difference]: Finished difference Result 7044 states and 11263 transitions. [2022-11-20 20:26:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:26:33,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (31), 2 states have call predecessors, (31), 6 states have return successors, (27), 6 states have call predecessors, (27), 2 states have call successors, (27) Word has length 237 [2022-11-20 20:26:33,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:33,656 INFO L225 Difference]: With dead ends: 7044 [2022-11-20 20:26:33,656 INFO L226 Difference]: Without dead ends: 4068 [2022-11-20 20:26:33,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:26:33,668 INFO L413 NwaCegarLoop]: 1681 mSDtfsCounter, 3 mSDsluCounter, 15088 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16769 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:33,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 16769 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 20:26:33,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2022-11-20 20:26:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 4027. [2022-11-20 20:26:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4027 states, 3099 states have (on average 1.4007744433688287) internal successors, (4341), 3122 states have internal predecessors, (4341), 754 states have call successors, (754), 139 states have call predecessors, (754), 173 states have return successors, (1208), 794 states have call predecessors, (1208), 752 states have call successors, (1208) [2022-11-20 20:26:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 6303 transitions. [2022-11-20 20:26:33,967 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 6303 transitions. Word has length 237 [2022-11-20 20:26:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:33,968 INFO L495 AbstractCegarLoop]: Abstraction has 4027 states and 6303 transitions. [2022-11-20 20:26:33,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.0) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (31), 2 states have call predecessors, (31), 6 states have return successors, (27), 6 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-20 20:26:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 6303 transitions. [2022-11-20 20:26:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-20 20:26:33,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:33,977 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:34,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:26:34,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-20 20:26:34,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:26:34,401 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1738572531, now seen corresponding path program 2 times [2022-11-20 20:26:34,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:26:34,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396641905] [2022-11-20 20:26:34,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:26:34,404 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 20:26:34,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:26:34,406 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:26:34,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:26:45,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:26:45,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:26:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:26:45,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-20 20:26:46,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:26:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-11-20 20:26:49,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:26:49,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396641905] [2022-11-20 20:26:49,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396641905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:26:49,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [196401700] [2022-11-20 20:26:49,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:26:49,022 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:26:49,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:26:49,023 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:26:49,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-20 20:27:14,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:27:14,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:27:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:27:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-20 20:27:14,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:27:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-11-20 20:27:15,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [196401700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:27:15,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481395619] [2022-11-20 20:27:15,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:27:15,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:15,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:27:15,174 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:27:15,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-20 20:27:20,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:27:20,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:27:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:27:20,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-20 20:27:22,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:27:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-20 20:27:25,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481395619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:27:25,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:27:25,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 18 [2022-11-20 20:27:25,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061540171] [2022-11-20 20:27:25,119 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:27:25,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 20:27:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:27:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 20:27:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:27:25,121 INFO L87 Difference]: Start difference. First operand 4027 states and 6303 transitions. Second operand has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 18 states have internal predecessors, (159), 2 states have call successors, (47), 2 states have call predecessors, (47), 4 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-20 20:27:33,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:27:35,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:27:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:42,916 INFO L93 Difference]: Finished difference Result 8117 states and 13140 transitions. [2022-11-20 20:27:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:27:42,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 18 states have internal predecessors, (159), 2 states have call successors, (47), 2 states have call predecessors, (47), 4 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 240 [2022-11-20 20:27:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:42,938 INFO L225 Difference]: With dead ends: 8117 [2022-11-20 20:27:42,939 INFO L226 Difference]: Without dead ends: 4091 [2022-11-20 20:27:42,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1442 GetRequests, 1418 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:27:42,957 INFO L413 NwaCegarLoop]: 1672 mSDtfsCounter, 22 mSDsluCounter, 18349 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20021 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:42,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 20021 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 253 Invalid, 2 Unknown, 0 Unchecked, 12.6s Time] [2022-11-20 20:27:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2022-11-20 20:27:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 4091. [2022-11-20 20:27:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4091 states, 3160 states have (on average 1.395886075949367) internal successors, (4411), 3183 states have internal predecessors, (4411), 754 states have call successors, (754), 142 states have call predecessors, (754), 176 states have return successors, (1208), 794 states have call predecessors, (1208), 752 states have call successors, (1208) [2022-11-20 20:27:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4091 states to 4091 states and 6373 transitions. [2022-11-20 20:27:43,256 INFO L78 Accepts]: Start accepts. Automaton has 4091 states and 6373 transitions. Word has length 240 [2022-11-20 20:27:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:43,256 INFO L495 AbstractCegarLoop]: Abstraction has 4091 states and 6373 transitions. [2022-11-20 20:27:43,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.833333333333334) internal successors, (159), 18 states have internal predecessors, (159), 2 states have call successors, (47), 2 states have call predecessors, (47), 4 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-20 20:27:43,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4091 states and 6373 transitions. [2022-11-20 20:27:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-20 20:27:43,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:43,264 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:43,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:43,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:27:43,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:43,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:27:43,864 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:43,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1895390820, now seen corresponding path program 1 times [2022-11-20 20:27:43,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:27:43,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865366444] [2022-11-20 20:27:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:43,867 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 20:27:43,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:27:43,868 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:27:43,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 (50)] Waiting until timeout for monitored process [2022-11-20 20:27:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:48,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 3388 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:27:48,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 47 proven. 100 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-11-20 20:27:53,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:28:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-20 20:28:02,524 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:28:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865366444] [2022-11-20 20:28:02,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865366444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:28:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [973896580] [2022-11-20 20:28:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:28:02,525 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:28:02,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:28:02,526 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:28:02,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-20 20:28:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:28:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 3388 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:28:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:28:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 47 proven. 100 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-11-20 20:28:17,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:28:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-20 20:28:19,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [973896580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:28:19,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388214631] [2022-11-20 20:28:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:28:19,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:28:19,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:28:19,005 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:28:19,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 20:28:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:28:24,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 3388 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:28:24,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:28:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 127 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-20 20:28:28,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:28:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-11-20 20:28:36,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388214631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:28:36,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:28:36,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 6, 6] total 32 [2022-11-20 20:28:36,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112472615] [2022-11-20 20:28:36,334 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:28:36,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 20:28:36,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:28:36,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 20:28:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:28:36,336 INFO L87 Difference]: Start difference. First operand 4091 states and 6373 transitions. Second operand has 32 states, 32 states have (on average 5.84375) internal successors, (187), 32 states have internal predecessors, (187), 2 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-20 20:29:00,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:29:03,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:29:05,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:29:08,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:29:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:29:26,802 INFO L93 Difference]: Finished difference Result 8272 states and 13318 transitions. [2022-11-20 20:29:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 20:29:26,803 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.84375) internal successors, (187), 32 states have internal predecessors, (187), 2 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 254 [2022-11-20 20:29:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:29:26,822 INFO L225 Difference]: With dead ends: 8272 [2022-11-20 20:29:26,822 INFO L226 Difference]: Without dead ends: 4180 [2022-11-20 20:29:26,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1535 GetRequests, 1488 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 20:29:26,851 INFO L413 NwaCegarLoop]: 1670 mSDtfsCounter, 50 mSDsluCounter, 26674 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 51 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 28344 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:29:26,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 28344 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 547 Invalid, 4 Unknown, 0 Unchecked, 28.4s Time] [2022-11-20 20:29:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2022-11-20 20:29:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 4180. [2022-11-20 20:29:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4180 states, 3248 states have (on average 1.3854679802955665) internal successors, (4500), 3271 states have internal predecessors, (4500), 754 states have call successors, (754), 143 states have call predecessors, (754), 177 states have return successors, (1208), 794 states have call predecessors, (1208), 752 states have call successors, (1208) [2022-11-20 20:29:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 6462 transitions. [2022-11-20 20:29:27,168 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 6462 transitions. Word has length 254 [2022-11-20 20:29:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:29:27,168 INFO L495 AbstractCegarLoop]: Abstraction has 4180 states and 6462 transitions. [2022-11-20 20:29:27,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.84375) internal successors, (187), 32 states have internal predecessors, (187), 2 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-20 20:29:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 6462 transitions. [2022-11-20 20:29:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-20 20:29:27,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:29:27,176 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:29:27,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-20 20:29:27,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-20 20:29:27,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 (50)] Forceful destruction successful, exit code 0 [2022-11-20 20:29:27,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:29:27,777 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:29:27,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:29:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash -762722585, now seen corresponding path program 1 times [2022-11-20 20:29:27,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:29:27,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089521878] [2022-11-20 20:29:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:29:27,780 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 20:29:27,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:29:27,781 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:29:27,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 (53)] Waiting until timeout for monitored process [2022-11-20 20:29:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:29:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:29:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:29:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 4 proven. 946 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 20:29:54,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:30:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 20:30:30,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:30:30,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089521878] [2022-11-20 20:30:30,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089521878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:30:30,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [505531825] [2022-11-20 20:30:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:30:30,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:30:30,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:30:30,339 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:30:30,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-20 20:30:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:30:36,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:30:36,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:30:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 4 proven. 946 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 20:30:41,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:30:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 20:30:47,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [505531825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:30:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686820074] [2022-11-20 20:30:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:30:47,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:30:47,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:30:47,517 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:30:47,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-20 20:30:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:30:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:30:50,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:30:51,844 INFO L321 Elim1Store]: treesize reduction 78, result has 19.6 percent of original size [2022-11-20 20:30:51,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 126 [2022-11-20 20:30:52,294 INFO L217 Elim1Store]: Index analysis took 372 ms [2022-11-20 20:30:52,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2022-11-20 20:30:53,433 INFO L217 Elim1Store]: Index analysis took 406 ms [2022-11-20 20:30:54,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 64 [2022-11-20 20:30:56,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-11-20 20:30:56,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2022-11-20 20:31:01,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:31:01,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 40 [2022-11-20 20:31:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2022-11-20 20:31:04,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:31:04,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686820074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:31:04,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-20 20:31:04,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [25, 25, 25, 25] total 51 [2022-11-20 20:31:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741656499] [2022-11-20 20:31:04,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:31:04,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:31:04,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:31:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:31:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2013, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 20:31:04,288 INFO L87 Difference]: Start difference. First operand 4180 states and 6462 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 20:31:10,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:31:13,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:31:22,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:31:26,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:32:06,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:32:07,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:32:09,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:32:10,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:32:12,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:32:15,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:32:21,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:32:23,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:32:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:32:39,126 INFO L93 Difference]: Finished difference Result 8332 states and 13143 transitions. [2022-11-20 20:32:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:32:39,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 239 [2022-11-20 20:32:39,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:32:39,150 INFO L225 Difference]: With dead ends: 8332 [2022-11-20 20:32:39,150 INFO L226 Difference]: Without dead ends: 4560 [2022-11-20 20:32:39,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1191 GetRequests, 1141 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 57.5s TimeCoverageRelationStatistics Valid=541, Invalid=2111, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 20:32:39,166 INFO L413 NwaCegarLoop]: 1489 mSDtfsCounter, 566 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 290 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 4633 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:32:39,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 4633 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1697 Invalid, 4 Unknown, 0 Unchecked, 92.5s Time] [2022-11-20 20:32:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4560 states. [2022-11-20 20:32:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4560 to 4333. [2022-11-20 20:32:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4333 states, 3353 states have (on average 1.38323889054578) internal successors, (4638), 3373 states have internal predecessors, (4638), 790 states have call successors, (790), 143 states have call predecessors, (790), 189 states have return successors, (1376), 845 states have call predecessors, (1376), 788 states have call successors, (1376) [2022-11-20 20:32:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4333 states to 4333 states and 6804 transitions. [2022-11-20 20:32:39,416 INFO L78 Accepts]: Start accepts. Automaton has 4333 states and 6804 transitions. Word has length 239 [2022-11-20 20:32:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:32:39,416 INFO L495 AbstractCegarLoop]: Abstraction has 4333 states and 6804 transitions. [2022-11-20 20:32:39,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-20 20:32:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4333 states and 6804 transitions. [2022-11-20 20:32:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-20 20:32:39,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:32:39,425 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:32:39,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 (53)] Forceful destruction successful, exit code 0 [2022-11-20 20:32:39,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-20 20:32:39,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-20 20:32:40,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:32:40,037 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:32:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:32:40,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1047130863, now seen corresponding path program 1 times [2022-11-20 20:32:40,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:32:40,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699695133] [2022-11-20 20:32:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:32:40,039 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 20:32:40,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:32:40,040 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 20:32:40,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f406d7a-d31e-4568-996c-044e8bc48af7/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 (56)] Waiting until timeout for monitored process [2022-11-20 20:32:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:32:42,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:32:42,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:33:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 4 proven. 946 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:33:09,167 INFO L328 TraceCheckSpWp]: Computing backward predicates...