./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/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_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/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_301efd33-f977-428a-a82e-354d3ecfe20a/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 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e --- 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 19:58:29,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:58:29,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:58:29,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:58:29,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:58:29,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:58:29,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:58:29,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:58:29,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:58:29,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:58:29,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:58:29,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:58:29,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:58:29,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:58:29,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:58:29,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:58:29,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:58:29,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:58:29,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:58:29,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:58:29,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:58:29,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:58:29,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:58:29,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:58:29,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:58:29,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:58:29,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:58:29,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:58:29,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:58:29,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:58:29,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:58:29,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:58:29,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:58:29,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:58:29,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:58:29,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:58:29,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:58:29,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:58:29,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:58:29,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:58:29,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:58:29,168 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 19:58:29,219 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:58:29,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:58:29,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:58:29,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:58:29,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:58:29,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:58:29,221 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:58:29,221 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:58:29,222 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:58:29,222 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:58:29,223 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:58:29,223 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:58:29,224 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:58:29,224 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:58:29,224 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:58:29,224 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:58:29,224 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:58:29,225 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:58:29,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:58:29,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:58:29,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:58:29,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:58:29,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:58:29,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:58:29,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:58:29,227 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:58:29,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:58:29,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:58:29,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:58:29,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:58:29,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:58:29,229 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:58:29,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:58:29,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:58:29,230 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:58:29,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:58:29,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:58:29,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:58:29,230 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_301efd33-f977-428a-a82e-354d3ecfe20a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e [2022-11-20 19:58:29,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:58:29,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:58:29,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:58:29,496 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:58:29,498 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:58:29,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-20 19:58:32,612 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:58:33,162 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:58:33,164 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-20 19:58:33,212 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/data/68d2fb4ba/6ff006774a824646a1a3ff2a92ec8b7f/FLAGa974aa019 [2022-11-20 19:58:33,231 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/data/68d2fb4ba/6ff006774a824646a1a3ff2a92ec8b7f [2022-11-20 19:58:33,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:58:33,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:58:33,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:58:33,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:58:33,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:58:33,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:58:33" (1/1) ... [2022-11-20 19:58:33,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e28118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:33, skipping insertion in model container [2022-11-20 19:58:33,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:58:33" (1/1) ... [2022-11-20 19:58:33,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:58:33,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:58:33,890 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:384) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.BitabsTranslation.abstractShiftRight(BitabsTranslation.java:159) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.constructBinaryBitwiseIntegerExpression(IntegerTranslation.java:190) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.ExpressionTranslation.constructBinaryBitwiseExpression(ExpressionTranslation.java:131) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CExpressionTranslator.handleBitshiftOperation(CExpressionTranslator.java:418) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:834) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:282) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2446) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:303) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:960) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:279) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:727) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:282) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2446) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:303) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleReturnStatement(FunctionHandler.java:540) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2061) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:193) 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 19:58:33,907 INFO L158 Benchmark]: Toolchain (without parser) took 668.22ms. Allocated memory is still 165.7MB. Free memory was 112.1MB in the beginning and 127.3MB in the end (delta: -15.2MB). Peak memory consumption was 54.9MB. Max. memory is 16.1GB. [2022-11-20 19:58:33,908 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 130.0MB. Free memory was 71.8MB in the beginning and 71.7MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:58:33,909 INFO L158 Benchmark]: CACSL2BoogieTranslator took 665.00ms. Allocated memory is still 165.7MB. Free memory was 112.0MB in the beginning and 127.3MB in the end (delta: -15.4MB). Peak memory consumption was 54.9MB. Max. memory is 16.1GB. [2022-11-20 19:58:33,910 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 130.0MB. Free memory was 71.8MB in the beginning and 71.7MB in the end (delta: 117.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 665.00ms. Allocated memory is still 165.7MB. Free memory was 112.0MB in the beginning and 127.3MB in the end (delta: -15.4MB). Peak memory consumption was 54.9MB. 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/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_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/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_301efd33-f977-428a-a82e-354d3ecfe20a/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 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e --- 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 19:58:36,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:58:36,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:58:36,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:58:36,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:58:36,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:58:36,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:58:36,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:58:36,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:58:36,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:58:36,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:58:36,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:58:36,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:58:36,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:58:36,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:58:36,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:58:36,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:58:36,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:58:36,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:58:36,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:58:36,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:58:36,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:58:36,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:58:36,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:58:36,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:58:36,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:58:36,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:58:36,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:58:36,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:58:36,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:58:36,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:58:36,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:58:36,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:58:36,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:58:36,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:58:36,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:58:36,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:58:36,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:58:36,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:58:36,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:58:36,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:58:36,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-20 19:58:36,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:58:36,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:58:36,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:58:36,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:58:36,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:58:36,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:58:36,333 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:58:36,333 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:58:36,333 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:58:36,333 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:58:36,334 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:58:36,334 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:58:36,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:58:36,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:58:36,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:58:36,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:58:36,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:58:36,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:58:36,336 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 19:58:36,336 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 19:58:36,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:58:36,336 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:58:36,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:58:36,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:58:36,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 19:58:36,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:58:36,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:58:36,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:58:36,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:58:36,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:58:36,338 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 19:58:36,339 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 19:58:36,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:58:36,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:58:36,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 19:58:36,339 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_301efd33-f977-428a-a82e-354d3ecfe20a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e [2022-11-20 19:58:36,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:58:36,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:58:36,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:58:36,690 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:58:36,691 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:58:36,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-20 19:58:39,678 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:58:40,312 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:58:40,313 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-20 19:58:40,357 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/data/acfe1671f/c515f8f9f5974f82ab40d94927a65954/FLAG35a82b1f6 [2022-11-20 19:58:40,384 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/data/acfe1671f/c515f8f9f5974f82ab40d94927a65954 [2022-11-20 19:58:40,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:58:40,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:58:40,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:58:40,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:58:40,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:58:40,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:58:40" (1/1) ... [2022-11-20 19:58:40,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c05b9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:40, skipping insertion in model container [2022-11-20 19:58:40,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:58:40" (1/1) ... [2022-11-20 19:58:40,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:58:40,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:58:42,027 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_301efd33-f977-428a-a82e-354d3ecfe20a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2022-11-20 19:58:42,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:58:42,324 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 19:58:42,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:58:42,676 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_301efd33-f977-428a-a82e-354d3ecfe20a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2022-11-20 19:58:42,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:58:42,718 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:58:42,994 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_301efd33-f977-428a-a82e-354d3ecfe20a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2022-11-20 19:58:43,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:58:43,131 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:58:43,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43 WrapperNode [2022-11-20 19:58:43,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:58:43,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:58:43,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:58:43,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:58:43,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,336 INFO L138 Inliner]: procedures = 296, calls = 1511, calls flagged for inlining = 101, calls inlined = 84, statements flattened = 2602 [2022-11-20 19:58:43,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:58:43,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:58:43,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:58:43,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:58:43,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,543 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:58:43,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:58:43,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:58:43,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:58:43,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (1/1) ... [2022-11-20 19:58:43,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:58:43,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:58:43,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:58:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-20 19:58:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-20 19:58:43,713 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-20 19:58:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-20 19:58:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 19:58:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2022-11-20 19:58:43,714 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2022-11-20 19:58:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-20 19:58:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-20 19:58:43,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-20 19:58:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-20 19:58:43,714 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-20 19:58:43,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wdm_mutex [2022-11-20 19:58:43,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wdm_mutex [2022-11-20 19:58:43,726 INFO L130 BoogieDeclarations]: Found specification of procedure recover_from_urb_loss [2022-11-20 19:58:43,726 INFO L138 BoogieDeclarations]: Found implementation of procedure recover_from_urb_loss [2022-11-20 19:58:43,726 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_control_urb [2022-11-20 19:58:43,727 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_control_urb [2022-11-20 19:58:43,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-20 19:58:43,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-20 19:58:43,727 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-20 19:58:43,728 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-20 19:58:43,728 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2022-11-20 19:58:43,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2022-11-20 19:58:43,728 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2022-11-20 19:58:43,729 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2022-11-20 19:58:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_create [2022-11-20 19:58:43,729 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_create [2022-11-20 19:58:43,730 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-20 19:58:43,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:58:43,731 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-20 19:58:43,731 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-20 19:58:43,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-20 19:58:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_poll [2022-11-20 19:58:43,732 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_poll [2022-11-20 19:58:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-20 19:58:43,732 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-20 19:58:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 19:58:43,733 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 19:58:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-20 19:58:43,733 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-20 19:58:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-20 19:58:43,734 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-20 19:58:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure clear_wdm_read_flag [2022-11-20 19:58:43,734 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_wdm_read_flag [2022-11-20 19:58:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_cancel_work_sync_39 [2022-11-20 19:58:43,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_cancel_work_sync_39 [2022-11-20 19:58:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_write [2022-11-20 19:58:43,735 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_write [2022-11-20 19:58:43,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:58:43,736 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-20 19:58:43,736 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-20 19:58:43,736 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_ioctl [2022-11-20 19:58:43,736 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_ioctl [2022-11-20 19:58:43,737 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_disconnect [2022-11-20 19:58:43,737 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_disconnect [2022-11-20 19:58:43,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 19:58:43,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_rlock_of_wdm_device [2022-11-20 19:58:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_rlock_of_wdm_device [2022-11-20 19:58:43,738 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-20 19:58:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-20 19:58:43,738 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2022-11-20 19:58:43,738 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2022-11-20 19:58:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-20 19:58:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_rxwork [2022-11-20 19:58:43,739 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_rxwork [2022-11-20 19:58:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-20 19:58:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-20 19:58:43,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:58:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 19:58:43,740 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_1 [2022-11-20 19:58:43,740 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_1 [2022-11-20 19:58:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 19:58:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 19:58:43,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-20 19:58:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-20 19:58:43,742 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2022-11-20 19:58:43,742 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2022-11-20 19:58:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-20 19:58:43,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-20 19:58:43,743 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-20 19:58:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-20 19:58:43,744 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-20 19:58:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-20 19:58:43,744 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-20 19:58:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-20 19:58:43,745 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-20 19:58:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-20 19:58:43,745 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-20 19:58:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-20 19:58:43,746 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wdm_mutex [2022-11-20 19:58:43,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wdm_mutex [2022-11-20 19:58:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wlock_of_wdm_device [2022-11-20 19:58:43,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wlock_of_wdm_device [2022-11-20 19:58:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~TO~C_INT [2022-11-20 19:58:43,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~TO~C_INT [2022-11-20 19:58:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-20 19:58:43,748 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-20 19:58:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-20 19:58:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-20 19:58:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-20 19:58:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-20 19:58:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_flush [2022-11-20 19:58:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_flush [2022-11-20 19:58:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wlock_of_wdm_device [2022-11-20 19:58:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wlock_of_wdm_device [2022-11-20 19:58:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2022-11-20 19:58:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2022-11-20 19:58:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-20 19:58:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-20 19:58:43,752 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-20 19:58:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-20 19:58:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-20 19:58:43,755 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-20 19:58:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure kill_urbs [2022-11-20 19:58:43,757 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_urbs [2022-11-20 19:58:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2022-11-20 19:58:43,758 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2022-11-20 19:58:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-20 19:58:43,759 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-20 19:58:43,763 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-20 19:58:43,764 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-20 19:58:43,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-11-20 19:58:43,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-20 19:58:43,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-11-20 19:58:43,764 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-20 19:58:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-20 19:58:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-20 19:58:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-20 19:58:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-20 19:58:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-20 19:58:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_resume [2022-11-20 19:58:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_resume [2022-11-20 19:58:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 19:58:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-20 19:58:43,766 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-20 19:58:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-20 19:58:43,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-20 19:58:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:58:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-20 19:58:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-20 19:58:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 19:58:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-20 19:58:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-20 19:58:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-20 19:58:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-20 19:58:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-20 19:58:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-20 19:58:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 19:58:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 19:58:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_rlock_of_wdm_device [2022-11-20 19:58:43,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_rlock_of_wdm_device [2022-11-20 19:58:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2022-11-20 19:58:43,769 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2022-11-20 19:58:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_find_device [2022-11-20 19:58:43,769 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_find_device [2022-11-20 19:58:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-20 19:58:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-20 19:58:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-20 19:58:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-20 19:58:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-11-20 19:58:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-11-20 19:58:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-20 19:58:43,771 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-20 19:58:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:58:43,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:58:44,463 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:58:44,469 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:58:46,633 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-20 19:59:07,078 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:59:07,102 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:59:07,102 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 19:59:07,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:59:07 BoogieIcfgContainer [2022-11-20 19:59:07,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:59:07,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:59:07,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:59:07,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:59:07,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:58:40" (1/3) ... [2022-11-20 19:59:07,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397df75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:59:07, skipping insertion in model container [2022-11-20 19:59:07,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:58:43" (2/3) ... [2022-11-20 19:59:07,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397df75d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:59:07, skipping insertion in model container [2022-11-20 19:59:07,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:59:07" (3/3) ... [2022-11-20 19:59:07,121 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-20 19:59:07,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:59:07,143 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:59:07,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:59:07,257 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;@26f0259e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:59:07,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:59:07,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 1054 states, 681 states have (on average 1.302496328928047) internal successors, (887), 714 states have internal predecessors, (887), 301 states have call successors, (301), 71 states have call predecessors, (301), 70 states have return successors, (296), 295 states have call predecessors, (296), 296 states have call successors, (296) [2022-11-20 19:59:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-20 19:59:07,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:07,305 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:07,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1355135188, now seen corresponding path program 1 times [2022-11-20 19:59:07,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:07,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632488187] [2022-11-20 19:59:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:07,331 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 19:59:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:07,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:07,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1635 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 19:59:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-11-20 19:59:08,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:08,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:08,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632488187] [2022-11-20 19:59:08,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632488187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:08,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:59:08,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:59:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131829117] [2022-11-20 19:59:08,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:08,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 19:59:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:08,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 19:59:08,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:59:08,787 INFO L87 Difference]: Start difference. First operand has 1054 states, 681 states have (on average 1.302496328928047) internal successors, (887), 714 states have internal predecessors, (887), 301 states have call successors, (301), 71 states have call predecessors, (301), 70 states have return successors, (296), 295 states have call predecessors, (296), 296 states have call successors, (296) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 19:59:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:08,955 INFO L93 Difference]: Finished difference Result 2103 states and 3013 transitions. [2022-11-20 19:59:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 19:59:08,959 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 192 [2022-11-20 19:59:08,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:08,984 INFO L225 Difference]: With dead ends: 2103 [2022-11-20 19:59:08,984 INFO L226 Difference]: Without dead ends: 1042 [2022-11-20 19:59:09,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:59:09,014 INFO L413 NwaCegarLoop]: 1467 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:09,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:59:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-11-20 19:59:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1042. [2022-11-20 19:59:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 676 states have (on average 1.2928994082840237) internal successors, (874), 702 states have internal predecessors, (874), 296 states have call successors, (296), 70 states have call predecessors, (296), 69 states have return successors, (282), 281 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-20 19:59:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1452 transitions. [2022-11-20 19:59:09,203 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1452 transitions. Word has length 192 [2022-11-20 19:59:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:09,203 INFO L495 AbstractCegarLoop]: Abstraction has 1042 states and 1452 transitions. [2022-11-20 19:59:09,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-20 19:59:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1452 transitions. [2022-11-20 19:59:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-20 19:59:09,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:09,208 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:09,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:09,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:09,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:09,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash 786178530, now seen corresponding path program 1 times [2022-11-20 19:59:09,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:09,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920257146] [2022-11-20 19:59:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:09,434 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 19:59:09,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:09,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:09,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1635 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 19:59:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2022-11-20 19:59:11,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:11,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:11,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920257146] [2022-11-20 19:59:11,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920257146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:11,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:59:11,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:59:11,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069543141] [2022-11-20 19:59:11,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:11,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:59:11,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:11,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:59:11,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:59:11,126 INFO L87 Difference]: Start difference. First operand 1042 states and 1452 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-20 19:59:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:11,433 INFO L93 Difference]: Finished difference Result 2070 states and 2891 transitions. [2022-11-20 19:59:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:59:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 192 [2022-11-20 19:59:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:11,442 INFO L225 Difference]: With dead ends: 2070 [2022-11-20 19:59:11,442 INFO L226 Difference]: Without dead ends: 1043 [2022-11-20 19:59:11,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:59:11,447 INFO L413 NwaCegarLoop]: 1450 mSDtfsCounter, 3 mSDsluCounter, 2881 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4331 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:11,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4331 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:59:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-11-20 19:59:11,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2022-11-20 19:59:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 677 states have (on average 1.292466765140325) internal successors, (875), 703 states have internal predecessors, (875), 296 states have call successors, (296), 70 states have call predecessors, (296), 69 states have return successors, (282), 281 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-20 19:59:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1453 transitions. [2022-11-20 19:59:11,500 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1453 transitions. Word has length 192 [2022-11-20 19:59:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:11,502 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1453 transitions. [2022-11-20 19:59:11,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-20 19:59:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1453 transitions. [2022-11-20 19:59:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-20 19:59:11,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:11,506 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:11,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 19:59:11,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:11,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1106102777, now seen corresponding path program 1 times [2022-11-20 19:59:11,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:11,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740032190] [2022-11-20 19:59:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:11,719 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 19:59:11,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:11,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:11,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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)] Waiting until timeout for monitored process [2022-11-20 19:59:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1734 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:59:13,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-11-20 19:59:13,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-20 19:59:13,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:13,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740032190] [2022-11-20 19:59:13,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740032190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:13,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [602131488] [2022-11-20 19:59:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:13,932 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:13,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:59:13,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:59:13,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-20 19:59:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1734 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:59:15,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-20 19:59:16,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:16,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [602131488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:16,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:59:16,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 9 [2022-11-20 19:59:16,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185084836] [2022-11-20 19:59:16,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:16,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:16,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:16,838 INFO L87 Difference]: Start difference. First operand 1043 states and 1453 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:16,923 INFO L93 Difference]: Finished difference Result 1045 states and 1454 transitions. [2022-11-20 19:59:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:16,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 201 [2022-11-20 19:59:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:16,931 INFO L225 Difference]: With dead ends: 1045 [2022-11-20 19:59:16,931 INFO L226 Difference]: Without dead ends: 1042 [2022-11-20 19:59:16,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:16,933 INFO L413 NwaCegarLoop]: 1449 mSDtfsCounter, 1370 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:16,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1370 Valid, 1449 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:59:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-11-20 19:59:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1042. [2022-11-20 19:59:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 677 states have (on average 1.2909896602658788) internal successors, (874), 702 states have internal predecessors, (874), 295 states have call successors, (295), 70 states have call predecessors, (295), 69 states have return successors, (282), 281 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-20 19:59:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1451 transitions. [2022-11-20 19:59:16,995 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1451 transitions. Word has length 201 [2022-11-20 19:59:16,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:16,996 INFO L495 AbstractCegarLoop]: Abstraction has 1042 states and 1451 transitions. [2022-11-20 19:59:16,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1451 transitions. [2022-11-20 19:59:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-20 19:59:16,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:17,000 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:17,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:17,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:17,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:17,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:17,416 INFO L85 PathProgramCache]: Analyzing trace with hash 70058859, now seen corresponding path program 1 times [2022-11-20 19:59:17,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:17,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032142655] [2022-11-20 19:59:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:17,417 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 19:59:17,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:17,418 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:17,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 19:59:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:59:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-11-20 19:59:19,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-20 19:59:19,552 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:19,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032142655] [2022-11-20 19:59:19,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032142655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:19,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1239633566] [2022-11-20 19:59:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:19,553 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:19,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:59:19,555 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:59:19,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-20 19:59:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:59:20,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-20 19:59:22,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:22,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1239633566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:22,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:59:22,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 9 [2022-11-20 19:59:22,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414274014] [2022-11-20 19:59:22,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:22,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:22,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:22,478 INFO L87 Difference]: Start difference. First operand 1042 states and 1451 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:22,553 INFO L93 Difference]: Finished difference Result 1044 states and 1452 transitions. [2022-11-20 19:59:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:22,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 202 [2022-11-20 19:59:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:22,561 INFO L225 Difference]: With dead ends: 1044 [2022-11-20 19:59:22,561 INFO L226 Difference]: Without dead ends: 1041 [2022-11-20 19:59:22,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:22,563 INFO L413 NwaCegarLoop]: 1447 mSDtfsCounter, 1367 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:22,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 1447 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:59:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-11-20 19:59:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1041. [2022-11-20 19:59:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 677 states have (on average 1.2895125553914328) internal successors, (873), 701 states have internal predecessors, (873), 294 states have call successors, (294), 70 states have call predecessors, (294), 69 states have return successors, (282), 281 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-20 19:59:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1449 transitions. [2022-11-20 19:59:22,636 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1449 transitions. Word has length 202 [2022-11-20 19:59:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:22,636 INFO L495 AbstractCegarLoop]: Abstraction has 1041 states and 1449 transitions. [2022-11-20 19:59:22,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:22,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1449 transitions. [2022-11-20 19:59:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-20 19:59:22,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:22,640 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:22,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:22,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:23,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:23,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:23,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2123631222, now seen corresponding path program 1 times [2022-11-20 19:59:23,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:23,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881579988] [2022-11-20 19:59:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:23,060 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 19:59:23,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:23,062 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:23,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 19:59:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:59:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-11-20 19:59:24,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-20 19:59:25,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:25,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881579988] [2022-11-20 19:59:25,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881579988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:25,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760739746] [2022-11-20 19:59:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:25,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:25,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:59:25,271 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:59:25,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 19:59:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:59:26,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-20 19:59:28,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:28,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [760739746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:28,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:59:28,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 9 [2022-11-20 19:59:28,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070607863] [2022-11-20 19:59:28,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:28,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:28,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:28,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:28,072 INFO L87 Difference]: Start difference. First operand 1041 states and 1449 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:28,156 INFO L93 Difference]: Finished difference Result 1043 states and 1450 transitions. [2022-11-20 19:59:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:28,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 203 [2022-11-20 19:59:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:28,163 INFO L225 Difference]: With dead ends: 1043 [2022-11-20 19:59:28,164 INFO L226 Difference]: Without dead ends: 1040 [2022-11-20 19:59:28,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:28,166 INFO L413 NwaCegarLoop]: 1445 mSDtfsCounter, 1364 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:28,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 1445 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:59:28,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-11-20 19:59:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1040. [2022-11-20 19:59:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 677 states have (on average 1.2880354505169866) internal successors, (872), 700 states have internal predecessors, (872), 293 states have call successors, (293), 70 states have call predecessors, (293), 69 states have return successors, (282), 281 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-20 19:59:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1447 transitions. [2022-11-20 19:59:28,275 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1447 transitions. Word has length 203 [2022-11-20 19:59:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:28,276 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1447 transitions. [2022-11-20 19:59:28,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1447 transitions. [2022-11-20 19:59:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-20 19:59:28,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:28,280 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:28,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:28,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:28,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:28,704 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash -532700392, now seen corresponding path program 1 times [2022-11-20 19:59:28,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:28,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514473220] [2022-11-20 19:59:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:28,706 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 19:59:28,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:28,707 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:28,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:59:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-11-20 19:59:30,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-20 19:59:30,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:30,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514473220] [2022-11-20 19:59:30,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514473220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:30,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2080494855] [2022-11-20 19:59:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:30,866 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:30,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:59:30,871 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:59:30,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-20 19:59:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:32,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:59:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-20 19:59:32,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:32,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2080494855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:32,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:59:32,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-20 19:59:32,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843032953] [2022-11-20 19:59:32,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:32,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:32,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:32,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:32,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:32,329 INFO L87 Difference]: Start difference. First operand 1040 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 19:59:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:32,903 INFO L93 Difference]: Finished difference Result 2591 states and 3561 transitions. [2022-11-20 19:59:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:32,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 204 [2022-11-20 19:59:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:32,914 INFO L225 Difference]: With dead ends: 2591 [2022-11-20 19:59:32,914 INFO L226 Difference]: Without dead ends: 1593 [2022-11-20 19:59:32,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:32,920 INFO L413 NwaCegarLoop]: 1587 mSDtfsCounter, 774 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:32,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 2937 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:59:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-11-20 19:59:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1572. [2022-11-20 19:59:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1028 states have (on average 1.2782101167315174) internal successors, (1314), 1054 states have internal predecessors, (1314), 423 states have call successors, (423), 121 states have call predecessors, (423), 120 states have return successors, (412), 410 states have call predecessors, (412), 412 states have call successors, (412) [2022-11-20 19:59:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2149 transitions. [2022-11-20 19:59:33,057 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2149 transitions. Word has length 204 [2022-11-20 19:59:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:33,061 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 2149 transitions. [2022-11-20 19:59:33,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 19:59:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2149 transitions. [2022-11-20 19:59:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-20 19:59:33,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:33,066 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:33,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:33,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:33,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:33,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1408542130, now seen corresponding path program 1 times [2022-11-20 19:59:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:33,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162417661] [2022-11-20 19:59:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:33,487 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 19:59:33,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:33,488 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:33,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 19:59:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:59:34,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-11-20 19:59:35,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-20 19:59:35,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:35,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162417661] [2022-11-20 19:59:35,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162417661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:35,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1278520110] [2022-11-20 19:59:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:35,669 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:35,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:59:35,671 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:59:35,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-20 19:59:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:37,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:59:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-20 19:59:38,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:38,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1278520110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:38,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:59:38,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 9 [2022-11-20 19:59:38,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551385682] [2022-11-20 19:59:38,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:38,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:38,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:38,568 INFO L87 Difference]: Start difference. First operand 1572 states and 2149 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:38,881 INFO L93 Difference]: Finished difference Result 4514 states and 6169 transitions. [2022-11-20 19:59:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:38,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 204 [2022-11-20 19:59:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:38,899 INFO L225 Difference]: With dead ends: 4514 [2022-11-20 19:59:38,899 INFO L226 Difference]: Without dead ends: 2984 [2022-11-20 19:59:38,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:38,908 INFO L413 NwaCegarLoop]: 1952 mSDtfsCounter, 1320 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:38,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 3283 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:59:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2022-11-20 19:59:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2972. [2022-11-20 19:59:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 1966 states have (on average 1.2833163784333672) internal successors, (2523), 2012 states have internal predecessors, (2523), 774 states have call successors, (774), 237 states have call predecessors, (774), 231 states have return successors, (761), 748 states have call predecessors, (761), 761 states have call successors, (761) [2022-11-20 19:59:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 4058 transitions. [2022-11-20 19:59:39,248 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 4058 transitions. Word has length 204 [2022-11-20 19:59:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:39,249 INFO L495 AbstractCegarLoop]: Abstraction has 2972 states and 4058 transitions. [2022-11-20 19:59:39,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 4058 transitions. [2022-11-20 19:59:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-20 19:59:39,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:39,253 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:39,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:39,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:39,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:39,675 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:39,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:39,676 INFO L85 PathProgramCache]: Analyzing trace with hash -715611891, now seen corresponding path program 1 times [2022-11-20 19:59:39,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:39,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180538836] [2022-11-20 19:59:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:39,678 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 19:59:39,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:39,680 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:39,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:41,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:59:41,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-11-20 19:59:41,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-20 19:59:41,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:41,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180538836] [2022-11-20 19:59:41,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180538836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:41,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1996315912] [2022-11-20 19:59:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:41,974 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:41,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:59:41,976 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:59:41,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-20 19:59:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:59:43,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-20 19:59:44,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:44,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1996315912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:44,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:59:44,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 9 [2022-11-20 19:59:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609772241] [2022-11-20 19:59:44,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:44,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:44,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:44,868 INFO L87 Difference]: Start difference. First operand 2972 states and 4058 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:45,154 INFO L93 Difference]: Finished difference Result 3351 states and 4419 transitions. [2022-11-20 19:59:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:45,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 205 [2022-11-20 19:59:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:45,173 INFO L225 Difference]: With dead ends: 3351 [2022-11-20 19:59:45,173 INFO L226 Difference]: Without dead ends: 3347 [2022-11-20 19:59:45,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:45,176 INFO L413 NwaCegarLoop]: 1456 mSDtfsCounter, 1163 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:45,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 1785 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:59:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2022-11-20 19:59:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 3341. [2022-11-20 19:59:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 2222 states have (on average 1.2605760576057605) internal successors, (2801), 2264 states have internal predecessors, (2801), 808 states have call successors, (808), 318 states have call predecessors, (808), 310 states have return successors, (797), 784 states have call predecessors, (797), 797 states have call successors, (797) [2022-11-20 19:59:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 4406 transitions. [2022-11-20 19:59:45,539 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 4406 transitions. Word has length 205 [2022-11-20 19:59:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:45,540 INFO L495 AbstractCegarLoop]: Abstraction has 3341 states and 4406 transitions. [2022-11-20 19:59:45,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 4406 transitions. [2022-11-20 19:59:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-20 19:59:45,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:45,544 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:45,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:45,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 19:59:45,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:45,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:45,960 INFO L85 PathProgramCache]: Analyzing trace with hash -709606095, now seen corresponding path program 1 times [2022-11-20 19:59:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:45,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644791040] [2022-11-20 19:59:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:45,961 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 19:59:45,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:45,963 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:45,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:59:47,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-11-20 19:59:47,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-20 19:59:48,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:48,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644791040] [2022-11-20 19:59:48,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644791040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1007358765] [2022-11-20 19:59:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:48,039 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:48,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:59:48,040 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:59:48,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-20 19:59:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:49,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:59:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-20 19:59:51,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:51,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1007358765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:51,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:59:51,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 9 [2022-11-20 19:59:51,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151916023] [2022-11-20 19:59:51,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:51,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:51,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:51,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:51,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:51,031 INFO L87 Difference]: Start difference. First operand 3341 states and 4406 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:51,663 INFO L93 Difference]: Finished difference Result 9447 states and 12517 transitions. [2022-11-20 19:59:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 206 [2022-11-20 19:59:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:51,694 INFO L225 Difference]: With dead ends: 9447 [2022-11-20 19:59:51,694 INFO L226 Difference]: Without dead ends: 6138 [2022-11-20 19:59:51,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:51,709 INFO L413 NwaCegarLoop]: 1695 mSDtfsCounter, 1310 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:51,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 2953 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:59:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6138 states. [2022-11-20 19:59:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6138 to 6099. [2022-11-20 19:59:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 4082 states have (on average 1.2677609015188633) internal successors, (5175), 4162 states have internal predecessors, (5175), 1459 states have call successors, (1459), 579 states have call predecessors, (1459), 557 states have return successors, (1453), 1402 states have call predecessors, (1453), 1445 states have call successors, (1453) [2022-11-20 19:59:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 8087 transitions. [2022-11-20 19:59:52,375 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 8087 transitions. Word has length 206 [2022-11-20 19:59:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:52,376 INFO L495 AbstractCegarLoop]: Abstraction has 6099 states and 8087 transitions. [2022-11-20 19:59:52,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-20 19:59:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 8087 transitions. [2022-11-20 19:59:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-20 19:59:52,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:52,382 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:59:52,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:52,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:52,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:52,809 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash -734921079, now seen corresponding path program 1 times [2022-11-20 19:59:52,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:52,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021701080] [2022-11-20 19:59:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:52,811 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 19:59:52,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:52,812 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:52,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 19:59:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:54,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1928 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:59:54,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-11-20 19:59:54,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-20 19:59:55,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:59:55,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021701080] [2022-11-20 19:59:55,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021701080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:55,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [117317168] [2022-11-20 19:59:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:55,397 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:59:55,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:59:55,399 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:59:55,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-20 19:59:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1928 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:59:57,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-20 19:59:57,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:57,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [117317168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:57,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:59:57,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-20 19:59:57,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091176324] [2022-11-20 19:59:57,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:57,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:57,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:59:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:57,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:57,114 INFO L87 Difference]: Start difference. First operand 6099 states and 8087 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-20 19:59:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:58,326 INFO L93 Difference]: Finished difference Result 15141 states and 20121 transitions. [2022-11-20 19:59:58,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:58,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 249 [2022-11-20 19:59:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:58,387 INFO L225 Difference]: With dead ends: 15141 [2022-11-20 19:59:58,388 INFO L226 Difference]: Without dead ends: 9084 [2022-11-20 19:59:58,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 737 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:59:58,412 INFO L413 NwaCegarLoop]: 2142 mSDtfsCounter, 989 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:58,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 3503 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:59:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9084 states. [2022-11-20 19:59:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9084 to 9022. [2022-11-20 19:59:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9022 states, 6081 states have (on average 1.2800526229238611) internal successors, (7784), 6225 states have internal predecessors, (7784), 2117 states have call successors, (2117), 847 states have call predecessors, (2117), 823 states have return successors, (2119), 2036 states have call predecessors, (2119), 2103 states have call successors, (2119) [2022-11-20 19:59:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 12020 transitions. [2022-11-20 19:59:59,351 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 12020 transitions. Word has length 249 [2022-11-20 19:59:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:59,353 INFO L495 AbstractCegarLoop]: Abstraction has 9022 states and 12020 transitions. [2022-11-20 19:59:59,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-20 19:59:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 12020 transitions. [2022-11-20 19:59:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-20 19:59:59,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:59,361 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2022-11-20 19:59:59,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:59,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:59,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:59,775 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -987209952, now seen corresponding path program 1 times [2022-11-20 19:59:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:59:59,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278223886] [2022-11-20 19:59:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:59,777 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 19:59:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:59:59,779 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 19:59:59,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 20:00:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:01,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2021 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:00:01,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-11-20 20:00:01,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2022-11-20 20:00:02,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:00:02,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278223886] [2022-11-20 20:00:02,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278223886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:02,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1720214162] [2022-11-20 20:00:02,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:02,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:00:02,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:00:02,343 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:00:02,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-20 20:00:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:04,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 2021 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:00:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2022-11-20 20:00:04,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:00:04,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1720214162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:04,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:00:04,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-20 20:00:04,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459863530] [2022-11-20 20:00:04,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:04,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:04,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:00:04,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:04,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:04,117 INFO L87 Difference]: Start difference. First operand 9022 states and 12020 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, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-20 20:00:06,241 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 20:00:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:06,962 INFO L93 Difference]: Finished difference Result 18013 states and 23997 transitions. [2022-11-20 20:00:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:06,962 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, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 278 [2022-11-20 20:00:06,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:07,005 INFO L225 Difference]: With dead ends: 18013 [2022-11-20 20:00:07,005 INFO L226 Difference]: Without dead ends: 9045 [2022-11-20 20:00:07,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:07,038 INFO L413 NwaCegarLoop]: 1452 mSDtfsCounter, 12 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2888 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:07,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2888 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 20:00:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2022-11-20 20:00:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 9001. [2022-11-20 20:00:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 6060 states have (on average 1.2797029702970297) internal successors, (7755), 6208 states have internal predecessors, (7755), 2117 states have call successors, (2117), 847 states have call predecessors, (2117), 823 states have return successors, (2119), 2032 states have call predecessors, (2119), 2103 states have call successors, (2119) [2022-11-20 20:00:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 11991 transitions. [2022-11-20 20:00:07,950 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 11991 transitions. Word has length 278 [2022-11-20 20:00:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:07,951 INFO L495 AbstractCegarLoop]: Abstraction has 9001 states and 11991 transitions. [2022-11-20 20:00:07,951 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, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-20 20:00:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 11991 transitions. [2022-11-20 20:00:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-20 20:00:07,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:07,959 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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] [2022-11-20 20:00:07,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:08,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:08,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:08,375 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:08,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1547821955, now seen corresponding path program 1 times [2022-11-20 20:00:08,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:00:08,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042038725] [2022-11-20 20:00:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:08,377 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 20:00:08,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:00:08,378 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:08,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 2028 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:00:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-20 20:00:10,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2022-11-20 20:00:11,028 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:00:11,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042038725] [2022-11-20 20:00:11,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042038725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:11,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [345458686] [2022-11-20 20:00:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:11,029 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:00:11,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:00:11,031 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:00:11,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-20 20:00:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:12,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 2028 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:00:12,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-11-20 20:00:13,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:00:13,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [345458686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:13,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:00:13,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-20 20:00:13,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181314702] [2022-11-20 20:00:13,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:00:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:13,177 INFO L87 Difference]: Start difference. First operand 9001 states and 11991 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-20 20:00:15,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:00:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:16,364 INFO L93 Difference]: Finished difference Result 22478 states and 29846 transitions. [2022-11-20 20:00:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 286 [2022-11-20 20:00:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:16,415 INFO L225 Difference]: With dead ends: 22478 [2022-11-20 20:00:16,415 INFO L226 Difference]: Without dead ends: 13533 [2022-11-20 20:00:16,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 848 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:16,447 INFO L413 NwaCegarLoop]: 2012 mSDtfsCounter, 1078 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 3331 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:16,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 3331 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 44 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 20:00:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13533 states. [2022-11-20 20:00:17,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13533 to 13451. [2022-11-20 20:00:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13451 states, 9109 states have (on average 1.2742342737951478) internal successors, (11607), 9327 states have internal predecessors, (11607), 3063 states have call successors, (3063), 1314 states have call predecessors, (3063), 1278 states have return successors, (3065), 2941 states have call predecessors, (3065), 3049 states have call successors, (3065) [2022-11-20 20:00:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13451 states to 13451 states and 17735 transitions. [2022-11-20 20:00:17,755 INFO L78 Accepts]: Start accepts. Automaton has 13451 states and 17735 transitions. Word has length 286 [2022-11-20 20:00:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:17,755 INFO L495 AbstractCegarLoop]: Abstraction has 13451 states and 17735 transitions. [2022-11-20 20:00:17,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-20 20:00:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 13451 states and 17735 transitions. [2022-11-20 20:00:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-20 20:00:17,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:17,763 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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] [2022-11-20 20:00:17,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:18,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:18,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:00:18,187 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash -697146346, now seen corresponding path program 1 times [2022-11-20 20:00:18,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:00:18,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853380019] [2022-11-20 20:00:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:18,189 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 20:00:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:00:18,195 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:18,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:20,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 2011 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:00:20,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-20 20:00:20,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2022-11-20 20:00:20,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:00:20,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853380019] [2022-11-20 20:00:20,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853380019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:20,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [935734082] [2022-11-20 20:00:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:20,838 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:00:20,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:00:20,839 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:00:20,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-20 20:00:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:22,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 2011 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:00:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-11-20 20:00:22,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:00:22,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [935734082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:22,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:00:22,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-20 20:00:22,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860006852] [2022-11-20 20:00:22,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:00:22,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:22,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:22,892 INFO L87 Difference]: Start difference. First operand 13451 states and 17735 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-20 20:00:25,008 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 20:00:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:25,833 INFO L93 Difference]: Finished difference Result 13459 states and 17741 transitions. [2022-11-20 20:00:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 295 [2022-11-20 20:00:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:25,881 INFO L225 Difference]: With dead ends: 13459 [2022-11-20 20:00:25,882 INFO L226 Difference]: Without dead ends: 13456 [2022-11-20 20:00:25,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:25,889 INFO L413 NwaCegarLoop]: 1526 mSDtfsCounter, 304 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2770 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:25,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 2770 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 20:00:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13456 states. [2022-11-20 20:00:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13456 to 13450. [2022-11-20 20:00:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13450 states, 9109 states have (on average 1.2728071138434516) internal successors, (11594), 9326 states have internal predecessors, (11594), 3062 states have call successors, (3062), 1314 states have call predecessors, (3062), 1278 states have return successors, (3065), 2941 states have call predecessors, (3065), 3049 states have call successors, (3065) [2022-11-20 20:00:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13450 states to 13450 states and 17721 transitions. [2022-11-20 20:00:26,929 INFO L78 Accepts]: Start accepts. Automaton has 13450 states and 17721 transitions. Word has length 295 [2022-11-20 20:00:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:26,929 INFO L495 AbstractCegarLoop]: Abstraction has 13450 states and 17721 transitions. [2022-11-20 20:00:26,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-20 20:00:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 13450 states and 17721 transitions. [2022-11-20 20:00:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-20 20:00:26,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:26,935 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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] [2022-11-20 20:00:26,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:27,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:00:27,359 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash 499935095, now seen corresponding path program 1 times [2022-11-20 20:00:27,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:00:27,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702595164] [2022-11-20 20:00:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:27,361 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 20:00:27,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:00:27,364 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:27,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 2118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:00:29,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-20 20:00:29,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2022-11-20 20:00:30,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:00:30,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702595164] [2022-11-20 20:00:30,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702595164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:30,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [285318885] [2022-11-20 20:00:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:30,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:00:30,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:00:30,479 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:00:30,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-20 20:00:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:32,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 2118 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:00:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-11-20 20:00:33,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:00:33,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [285318885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:33,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:00:33,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-20 20:00:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575836486] [2022-11-20 20:00:33,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:33,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:00:33,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:33,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:33,176 INFO L87 Difference]: Start difference. First operand 13450 states and 17721 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-20 20:00:35,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:00:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:36,495 INFO L93 Difference]: Finished difference Result 31605 states and 41655 transitions. [2022-11-20 20:00:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 311 [2022-11-20 20:00:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:36,559 INFO L225 Difference]: With dead ends: 31605 [2022-11-20 20:00:36,559 INFO L226 Difference]: Without dead ends: 18211 [2022-11-20 20:00:36,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 923 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:36,592 INFO L413 NwaCegarLoop]: 1894 mSDtfsCounter, 1098 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:36,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 3131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 20:00:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18211 states. [2022-11-20 20:00:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18211 to 18146. [2022-11-20 20:00:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18146 states, 12407 states have (on average 1.2769404368501653) internal successors, (15843), 12718 states have internal predecessors, (15843), 4000 states have call successors, (4000), 1778 states have call predecessors, (4000), 1738 states have return successors, (4011), 3845 states have call predecessors, (4011), 3987 states have call successors, (4011) [2022-11-20 20:00:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18146 states to 18146 states and 23854 transitions. [2022-11-20 20:00:38,108 INFO L78 Accepts]: Start accepts. Automaton has 18146 states and 23854 transitions. Word has length 311 [2022-11-20 20:00:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:38,109 INFO L495 AbstractCegarLoop]: Abstraction has 18146 states and 23854 transitions. [2022-11-20 20:00:38,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-20 20:00:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 18146 states and 23854 transitions. [2022-11-20 20:00:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-20 20:00:38,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:38,115 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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, 1, 1, 1] [2022-11-20 20:00:38,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:38,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:38,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:00:38,539 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 752900620, now seen corresponding path program 1 times [2022-11-20 20:00:38,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:00:38,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408160842] [2022-11-20 20:00:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:38,541 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 20:00:38,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:00:38,543 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:38,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:40,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 2091 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:00:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2022-11-20 20:00:40,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-11-20 20:00:41,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:00:41,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408160842] [2022-11-20 20:00:41,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408160842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [595073011] [2022-11-20 20:00:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:41,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:00:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:00:41,278 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:00:41,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-20 20:00:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:43,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 2091 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:00:43,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-11-20 20:00:43,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:00:43,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [595073011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:43,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:00:43,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-20 20:00:43,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610629105] [2022-11-20 20:00:43,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:43,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:43,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:00:43,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:43,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:43,418 INFO L87 Difference]: Start difference. First operand 18146 states and 23854 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-20 20:00:45,535 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 20:00:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:46,860 INFO L93 Difference]: Finished difference Result 36248 states and 47660 transitions. [2022-11-20 20:00:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:46,860 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), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 319 [2022-11-20 20:00:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:46,931 INFO L225 Difference]: With dead ends: 36248 [2022-11-20 20:00:46,931 INFO L226 Difference]: Without dead ends: 18158 [2022-11-20 20:00:46,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 947 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:46,975 INFO L413 NwaCegarLoop]: 2493 mSDtfsCounter, 1244 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 3876 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:46,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 3876 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 20:00:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18158 states. [2022-11-20 20:00:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18158 to 18051. [2022-11-20 20:00:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18051 states, 12336 states have (on average 1.2740758754863812) internal successors, (15717), 12663 states have internal predecessors, (15717), 3981 states have call successors, (3981), 1758 states have call predecessors, (3981), 1733 states have return successors, (3964), 3825 states have call predecessors, (3964), 3952 states have call successors, (3964) [2022-11-20 20:00:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18051 states to 18051 states and 23662 transitions. [2022-11-20 20:00:48,618 INFO L78 Accepts]: Start accepts. Automaton has 18051 states and 23662 transitions. Word has length 319 [2022-11-20 20:00:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:48,619 INFO L495 AbstractCegarLoop]: Abstraction has 18051 states and 23662 transitions. [2022-11-20 20:00:48,619 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), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-20 20:00:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 18051 states and 23662 transitions. [2022-11-20 20:00:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-20 20:00:48,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:48,626 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:48,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:48,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:49,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:49,043 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash -53828569, now seen corresponding path program 1 times [2022-11-20 20:00:49,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:00:49,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991686368] [2022-11-20 20:00:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:49,045 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 20:00:49,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:00:49,051 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:49,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:00:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-20 20:00:51,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2022-11-20 20:00:51,773 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:00:51,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991686368] [2022-11-20 20:00:51,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991686368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:51,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819623016] [2022-11-20 20:00:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:51,774 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:00:51,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:00:51,775 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:00:51,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-20 20:00:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:53,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:00:53,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-11-20 20:00:54,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:00:54,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1819623016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:54,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:00:54,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-20 20:00:54,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683504998] [2022-11-20 20:00:54,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:54,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:00:54,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:00:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:00:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:00:54,042 INFO L87 Difference]: Start difference. First operand 18051 states and 23662 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-20 20:00:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:55,499 INFO L93 Difference]: Finished difference Result 18632 states and 24170 transitions. [2022-11-20 20:00:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:00:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 326 [2022-11-20 20:00:55,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:55,565 INFO L225 Difference]: With dead ends: 18632 [2022-11-20 20:00:55,566 INFO L226 Difference]: Without dead ends: 17399 [2022-11-20 20:00:55,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 966 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:00:55,577 INFO L413 NwaCegarLoop]: 1446 mSDtfsCounter, 12 mSDsluCounter, 4306 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5752 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:55,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 5752 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:55,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17399 states. [2022-11-20 20:00:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17399 to 17351. [2022-11-20 20:00:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17351 states, 11929 states have (on average 1.2722776427194233) internal successors, (15177), 12209 states have internal predecessors, (15177), 3725 states have call successors, (3725), 1721 states have call predecessors, (3725), 1696 states have return successors, (3710), 3604 states have call predecessors, (3710), 3698 states have call successors, (3710) [2022-11-20 20:00:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17351 states to 17351 states and 22612 transitions. [2022-11-20 20:00:56,948 INFO L78 Accepts]: Start accepts. Automaton has 17351 states and 22612 transitions. Word has length 326 [2022-11-20 20:00:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:56,949 INFO L495 AbstractCegarLoop]: Abstraction has 17351 states and 22612 transitions. [2022-11-20 20:00:56,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-20 20:00:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 17351 states and 22612 transitions. [2022-11-20 20:00:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-11-20 20:00:56,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:56,954 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 3, 3, 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, 1] [2022-11-20 20:00:56,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:57,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:57,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:57,355 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash 743435958, now seen corresponding path program 1 times [2022-11-20 20:00:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:00:57,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822318653] [2022-11-20 20:00:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:57,357 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 20:00:57,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:00:57,358 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:00:57,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 20:00:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:59,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:00:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-11-20 20:00:59,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2022-11-20 20:01:00,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822318653] [2022-11-20 20:01:00,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822318653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1030095890] [2022-11-20 20:01:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:00,135 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:01:00,139 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:01:00,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-20 20:01:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:02,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:01:02,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-11-20 20:01:02,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:02,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1030095890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:02,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:02,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-20 20:01:02,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124164784] [2022-11-20 20:01:02,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:02,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:01:02,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:01:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:01:02,500 INFO L87 Difference]: Start difference. First operand 17351 states and 22612 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-20 20:01:04,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:01:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:07,551 INFO L93 Difference]: Finished difference Result 41172 states and 53672 transitions. [2022-11-20 20:01:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:01:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 323 [2022-11-20 20:01:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:07,614 INFO L225 Difference]: With dead ends: 41172 [2022-11-20 20:01:07,614 INFO L226 Difference]: Without dead ends: 23877 [2022-11-20 20:01:07,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 958 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:01:07,649 INFO L413 NwaCegarLoop]: 2490 mSDtfsCounter, 1639 mSDsluCounter, 5809 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 241 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1641 SdHoareTripleChecker+Valid, 8299 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:07,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1641 Valid, 8299 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 102 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 20:01:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23877 states. [2022-11-20 20:01:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23877 to 17387. [2022-11-20 20:01:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17387 states, 11965 states have (on average 1.2714584203928123) internal successors, (15213), 12245 states have internal predecessors, (15213), 3725 states have call successors, (3725), 1721 states have call predecessors, (3725), 1696 states have return successors, (3710), 3604 states have call predecessors, (3710), 3698 states have call successors, (3710) [2022-11-20 20:01:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17387 states to 17387 states and 22648 transitions. [2022-11-20 20:01:09,186 INFO L78 Accepts]: Start accepts. Automaton has 17387 states and 22648 transitions. Word has length 323 [2022-11-20 20:01:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:09,186 INFO L495 AbstractCegarLoop]: Abstraction has 17387 states and 22648 transitions. [2022-11-20 20:01:09,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-20 20:01:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 17387 states and 22648 transitions. [2022-11-20 20:01:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-11-20 20:01:09,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:09,195 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 3, 3, 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, 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 20:01:09,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:09,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:09,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:09,603 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash 581099551, now seen corresponding path program 1 times [2022-11-20 20:01:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:09,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654804220] [2022-11-20 20:01:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:09,605 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 20:01:09,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:09,606 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:01:09,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-20 20:01:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:11,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 2176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:01:11,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2022-11-20 20:01:11,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 881 trivial. 0 not checked. [2022-11-20 20:01:12,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:12,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654804220] [2022-11-20 20:01:12,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654804220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:12,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1850223978] [2022-11-20 20:01:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:12,372 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:12,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:01:12,375 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:01:12,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-20 20:01:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 2176 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:01:14,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-11-20 20:01:14,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:14,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1850223978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:14,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:14,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-20 20:01:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765316333] [2022-11-20 20:01:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:14,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:01:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:01:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:01:14,729 INFO L87 Difference]: Start difference. First operand 17387 states and 22648 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-20 20:01:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:16,724 INFO L93 Difference]: Finished difference Result 34874 states and 45429 transitions. [2022-11-20 20:01:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:01:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 341 [2022-11-20 20:01:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:16,776 INFO L225 Difference]: With dead ends: 34874 [2022-11-20 20:01:16,776 INFO L226 Difference]: Without dead ends: 17543 [2022-11-20 20:01:16,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 1011 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:01:16,805 INFO L413 NwaCegarLoop]: 1447 mSDtfsCounter, 125 mSDsluCounter, 4150 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5597 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:16,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 5597 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:01:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17543 states. [2022-11-20 20:01:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17543 to 17387. [2022-11-20 20:01:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17387 states, 11965 states have (on average 1.2704554951943168) internal successors, (15201), 12245 states have internal predecessors, (15201), 3725 states have call successors, (3725), 1721 states have call predecessors, (3725), 1696 states have return successors, (3698), 3604 states have call predecessors, (3698), 3698 states have call successors, (3698) [2022-11-20 20:01:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17387 states to 17387 states and 22624 transitions. [2022-11-20 20:01:18,597 INFO L78 Accepts]: Start accepts. Automaton has 17387 states and 22624 transitions. Word has length 341 [2022-11-20 20:01:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:18,598 INFO L495 AbstractCegarLoop]: Abstraction has 17387 states and 22624 transitions. [2022-11-20 20:01:18,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-20 20:01:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 17387 states and 22624 transitions. [2022-11-20 20:01:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-11-20 20:01:18,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:18,606 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:18,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:18,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:19,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:19,023 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:19,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1541923316, now seen corresponding path program 1 times [2022-11-20 20:01:19,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:19,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508846705] [2022-11-20 20:01:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:19,025 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 20:01:19,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:19,026 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:01:19,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-20 20:01:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:21,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:01:21,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-11-20 20:01:21,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2022-11-20 20:01:21,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508846705] [2022-11-20 20:01:21,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508846705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:21,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [354086367] [2022-11-20 20:01:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:21,824 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:21,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:01:21,825 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:01:21,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-20 20:01:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:24,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:01:24,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-11-20 20:01:24,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:24,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [354086367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:24,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:24,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-20 20:01:24,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298321192] [2022-11-20 20:01:24,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:01:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:01:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:01:24,359 INFO L87 Difference]: Start difference. First operand 17387 states and 22624 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-20 20:01:26,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:01:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:29,476 INFO L93 Difference]: Finished difference Result 41340 states and 53599 transitions. [2022-11-20 20:01:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:01:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 339 [2022-11-20 20:01:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:29,528 INFO L225 Difference]: With dead ends: 41340 [2022-11-20 20:01:29,528 INFO L226 Difference]: Without dead ends: 24009 [2022-11-20 20:01:29,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 1006 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:01:29,554 INFO L413 NwaCegarLoop]: 2499 mSDtfsCounter, 1465 mSDsluCounter, 5991 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 129 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 8490 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:29,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 8490 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 20:01:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24009 states. [2022-11-20 20:01:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24009 to 17459. [2022-11-20 20:01:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17459 states, 12013 states have (on average 1.2693748439190877) internal successors, (15249), 12293 states have internal predecessors, (15249), 3749 states have call successors, (3749), 1721 states have call predecessors, (3749), 1696 states have return successors, (3722), 3628 states have call predecessors, (3722), 3722 states have call successors, (3722) [2022-11-20 20:01:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17459 states to 17459 states and 22720 transitions. [2022-11-20 20:01:31,479 INFO L78 Accepts]: Start accepts. Automaton has 17459 states and 22720 transitions. Word has length 339 [2022-11-20 20:01:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:31,480 INFO L495 AbstractCegarLoop]: Abstraction has 17459 states and 22720 transitions. [2022-11-20 20:01:31,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 3 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-20 20:01:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 17459 states and 22720 transitions. [2022-11-20 20:01:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-20 20:01:31,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:31,491 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 3, 3, 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, 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 20:01:31,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:31,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:31,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:01:31,916 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:31,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:31,917 INFO L85 PathProgramCache]: Analyzing trace with hash 16239639, now seen corresponding path program 1 times [2022-11-20 20:01:31,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:31,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990961940] [2022-11-20 20:01:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:31,919 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 20:01:31,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:31,920 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:01:31,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 20:01:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:01:34,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-11-20 20:01:34,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2022-11-20 20:01:34,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:34,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990961940] [2022-11-20 20:01:34,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990961940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:34,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2007291659] [2022-11-20 20:01:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:34,907 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:34,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:01:34,908 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:01:34,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-20 20:01:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:37,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:01:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-11-20 20:01:37,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:37,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2007291659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:37,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:37,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5] total 14 [2022-11-20 20:01:37,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379610030] [2022-11-20 20:01:37,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:37,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:01:37,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:37,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:01:37,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:01:37,850 INFO L87 Difference]: Start difference. First operand 17459 states and 22720 transitions. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2022-11-20 20:01:39,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:01:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:45,421 INFO L93 Difference]: Finished difference Result 41532 states and 54032 transitions. [2022-11-20 20:01:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:01:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 345 [2022-11-20 20:01:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:45,474 INFO L225 Difference]: With dead ends: 41532 [2022-11-20 20:01:45,474 INFO L226 Difference]: Without dead ends: 24129 [2022-11-20 20:01:45,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 1021 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:01:45,497 INFO L413 NwaCegarLoop]: 2471 mSDtfsCounter, 1626 mSDsluCounter, 13197 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 248 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 15668 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:45,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 15668 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 419 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-20 20:01:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24129 states. [2022-11-20 20:01:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24129 to 17507. [2022-11-20 20:01:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17507 states, 12049 states have (on average 1.2685700058096108) internal successors, (15285), 12329 states have internal predecessors, (15285), 3749 states have call successors, (3749), 1721 states have call predecessors, (3749), 1708 states have return successors, (3734), 3640 states have call predecessors, (3734), 3722 states have call successors, (3734) [2022-11-20 20:01:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17507 states to 17507 states and 22768 transitions. [2022-11-20 20:01:47,620 INFO L78 Accepts]: Start accepts. Automaton has 17507 states and 22768 transitions. Word has length 345 [2022-11-20 20:01:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:47,621 INFO L495 AbstractCegarLoop]: Abstraction has 17507 states and 22768 transitions. [2022-11-20 20:01:47,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 3 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2022-11-20 20:01:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 17507 states and 22768 transitions. [2022-11-20 20:01:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-11-20 20:01:47,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:47,629 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:01:47,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-20 20:01:47,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:48,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:01:48,054 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1516116418, now seen corresponding path program 1 times [2022-11-20 20:01:48,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:48,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403602584] [2022-11-20 20:01:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:48,057 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 20:01:48,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:48,058 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:01:48,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-20 20:01:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 2192 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:01:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2022-11-20 20:01:50,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-20 20:01:51,057 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403602584] [2022-11-20 20:01:51,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403602584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [389134253] [2022-11-20 20:01:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:51,058 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:51,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:01:51,059 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:01:51,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-20 20:01:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:53,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 2192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:01:53,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2022-11-20 20:01:53,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:53,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [389134253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:53,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:53,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-20 20:01:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059145232] [2022-11-20 20:01:53,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:53,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:01:53,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:01:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:01:53,582 INFO L87 Difference]: Start difference. First operand 17507 states and 22768 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-20 20:01:55,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:01:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:57,003 INFO L93 Difference]: Finished difference Result 31202 states and 40340 transitions. [2022-11-20 20:01:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:01:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 351 [2022-11-20 20:01:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:57,048 INFO L225 Difference]: With dead ends: 31202 [2022-11-20 20:01:57,049 INFO L226 Difference]: Without dead ends: 13751 [2022-11-20 20:01:57,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 1043 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:01:57,083 INFO L413 NwaCegarLoop]: 2407 mSDtfsCounter, 1315 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 3775 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:57,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1315 Valid, 3775 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 20:01:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13751 states. [2022-11-20 20:01:58,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13751 to 13534. [2022-11-20 20:01:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 9327 states have (on average 1.2594617776348236) internal successors, (11747), 9527 states have internal predecessors, (11747), 2822 states have call successors, (2822), 1386 states have call predecessors, (2822), 1384 states have return successors, (2806), 2756 states have call predecessors, (2806), 2797 states have call successors, (2806) [2022-11-20 20:01:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 17375 transitions. [2022-11-20 20:01:58,489 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 17375 transitions. Word has length 351 [2022-11-20 20:01:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:58,489 INFO L495 AbstractCegarLoop]: Abstraction has 13534 states and 17375 transitions. [2022-11-20 20:01:58,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-20 20:01:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 17375 transitions. [2022-11-20 20:01:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-11-20 20:01:58,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:58,492 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:01:58,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:58,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:58,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:58,893 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1190502976, now seen corresponding path program 1 times [2022-11-20 20:01:58,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:58,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011500583] [2022-11-20 20:01:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:58,896 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 20:01:58,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:58,897 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:01:58,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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)] Waiting until timeout for monitored process [2022-11-20 20:02:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:01,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:02:01,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2022-11-20 20:02:01,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-20 20:02:01,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:02:01,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011500583] [2022-11-20 20:02:01,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011500583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:01,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [93395622] [2022-11-20 20:02:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:01,875 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:02:01,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:02:01,876 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:02:01,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-20 20:02:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:04,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:02:04,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2022-11-20 20:02:04,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:02:04,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [93395622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:02:04,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:02:04,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-20 20:02:04,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541116052] [2022-11-20 20:02:04,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:02:04,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:02:04,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:02:04,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:02:04,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:02:04,825 INFO L87 Difference]: Start difference. First operand 13534 states and 17375 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-20 20:02:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:07,324 INFO L93 Difference]: Finished difference Result 28058 states and 36267 transitions. [2022-11-20 20:02:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:02:07,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 351 [2022-11-20 20:02:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:07,369 INFO L225 Difference]: With dead ends: 28058 [2022-11-20 20:02:07,369 INFO L226 Difference]: Without dead ends: 14580 [2022-11-20 20:02:07,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:02:07,391 INFO L413 NwaCegarLoop]: 1677 mSDtfsCounter, 982 mSDsluCounter, 5344 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 7021 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:07,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 7021 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:02:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14580 states. [2022-11-20 20:02:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14580 to 13570. [2022-11-20 20:02:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13570 states, 9354 states have (on average 1.2587128501175968) internal successors, (11774), 9554 states have internal predecessors, (11774), 2831 states have call successors, (2831), 1386 states have call predecessors, (2831), 1384 states have return successors, (2815), 2765 states have call predecessors, (2815), 2806 states have call successors, (2815) [2022-11-20 20:02:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13570 states to 13570 states and 17420 transitions. [2022-11-20 20:02:09,172 INFO L78 Accepts]: Start accepts. Automaton has 13570 states and 17420 transitions. Word has length 351 [2022-11-20 20:02:09,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:09,173 INFO L495 AbstractCegarLoop]: Abstraction has 13570 states and 17420 transitions. [2022-11-20 20:02:09,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2022-11-20 20:02:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 13570 states and 17420 transitions. [2022-11-20 20:02:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-11-20 20:02:09,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:09,176 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:09,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:09,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:09,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:02:09,577 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 824983841, now seen corresponding path program 1 times [2022-11-20 20:02:09,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:02:09,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382414542] [2022-11-20 20:02:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:09,579 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 20:02:09,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:02:09,580 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:09,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:11,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:02:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2022-11-20 20:02:11,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-20 20:02:12,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:02:12,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382414542] [2022-11-20 20:02:12,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382414542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:12,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [452764383] [2022-11-20 20:02:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:12,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:02:12,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:02:12,531 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:02:12,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-20 20:02:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:02:16,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2022-11-20 20:02:16,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-20 20:02:17,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [452764383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071467583] [2022-11-20 20:02:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:17,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:17,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:17,284 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:17,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 20:02:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:19,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:02:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-11-20 20:02:19,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:02:19,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071467583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:02:19,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-20 20:02:19,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 5, 5] total 11 [2022-11-20 20:02:19,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698122803] [2022-11-20 20:02:19,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:02:19,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:02:19,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:02:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:02:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:02:19,345 INFO L87 Difference]: Start difference. First operand 13570 states and 17420 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-20 20:02:21,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:02:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:24,461 INFO L93 Difference]: Finished difference Result 32458 states and 41543 transitions. [2022-11-20 20:02:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:02:24,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 353 [2022-11-20 20:02:24,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:24,518 INFO L225 Difference]: With dead ends: 32458 [2022-11-20 20:02:24,519 INFO L226 Difference]: Without dead ends: 18944 [2022-11-20 20:02:24,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1765 GetRequests, 1753 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:02:24,550 INFO L413 NwaCegarLoop]: 2488 mSDtfsCounter, 1459 mSDsluCounter, 5967 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 136 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 8455 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:24,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1466 Valid, 8455 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 94 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 20:02:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18944 states. [2022-11-20 20:02:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18944 to 13552. [2022-11-20 20:02:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13552 states, 9342 states have (on average 1.2587240419610362) internal successors, (11759), 9542 states have internal predecessors, (11759), 2825 states have call successors, (2825), 1386 states have call predecessors, (2825), 1384 states have return successors, (2809), 2759 states have call predecessors, (2809), 2800 states have call successors, (2809) [2022-11-20 20:02:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13552 states to 13552 states and 17393 transitions. [2022-11-20 20:02:26,070 INFO L78 Accepts]: Start accepts. Automaton has 13552 states and 17393 transitions. Word has length 353 [2022-11-20 20:02:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:26,071 INFO L495 AbstractCegarLoop]: Abstraction has 13552 states and 17393 transitions. [2022-11-20 20:02:26,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 3 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-20 20:02:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13552 states and 17393 transitions. [2022-11-20 20:02:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-11-20 20:02:26,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:26,077 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:26,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:26,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:26,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 20:02:26,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:26,683 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash 846425024, now seen corresponding path program 1 times [2022-11-20 20:02:26,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:02:26,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253703199] [2022-11-20 20:02:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:26,686 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 20:02:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:02:26,687 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:26,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 2271 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:02:28,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-20 20:02:29,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked. [2022-11-20 20:02:29,693 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:02:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253703199] [2022-11-20 20:02:29,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253703199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:29,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [528509484] [2022-11-20 20:02:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:29,694 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:02:29,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:02:29,703 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:02:29,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-20 20:02:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 2271 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:02:34,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-20 20:02:34,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked. [2022-11-20 20:02:34,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [528509484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712186188] [2022-11-20 20:02:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:34,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:34,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:34,498 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:34,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-20 20:02:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 2271 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:02:36,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-20 20:02:36,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:02:36,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712186188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:02:36,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-20 20:02:36,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 5, 5] total 11 [2022-11-20 20:02:36,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147217379] [2022-11-20 20:02:36,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:02:36,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:02:36,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:02:36,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:02:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:02:36,616 INFO L87 Difference]: Start difference. First operand 13552 states and 17393 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-20 20:02:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:38,968 INFO L93 Difference]: Finished difference Result 15756 states and 20759 transitions. [2022-11-20 20:02:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:02:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 384 [2022-11-20 20:02:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:38,998 INFO L225 Difference]: With dead ends: 15756 [2022-11-20 20:02:38,998 INFO L226 Difference]: Without dead ends: 15285 [2022-11-20 20:02:39,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1918 GetRequests, 1907 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:02:39,004 INFO L413 NwaCegarLoop]: 1858 mSDtfsCounter, 811 mSDsluCounter, 4511 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 6369 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:39,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 6369 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:02:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15285 states. [2022-11-20 20:02:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15285 to 13266. [2022-11-20 20:02:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13266 states, 9164 states have (on average 1.255892623308599) internal successors, (11509), 9347 states have internal predecessors, (11509), 2724 states have call successors, (2724), 1378 states have call predecessors, (2724), 1377 states have return successors, (2710), 2666 states have call predecessors, (2710), 2701 states have call successors, (2710) [2022-11-20 20:02:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13266 states to 13266 states and 16943 transitions. [2022-11-20 20:02:40,444 INFO L78 Accepts]: Start accepts. Automaton has 13266 states and 16943 transitions. Word has length 384 [2022-11-20 20:02:40,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:40,445 INFO L495 AbstractCegarLoop]: Abstraction has 13266 states and 16943 transitions. [2022-11-20 20:02:40,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-20 20:02:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 13266 states and 16943 transitions. [2022-11-20 20:02:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-11-20 20:02:40,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:40,450 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:40,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:40,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:40,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:02:41,051 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -556584020, now seen corresponding path program 1 times [2022-11-20 20:02:41,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:02:41,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092475564] [2022-11-20 20:02:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:41,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:02:41,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:02:41,054 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:41,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:43,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 2298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:02:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2022-11-20 20:02:43,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2022-11-20 20:02:44,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:02:44,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092475564] [2022-11-20 20:02:44,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092475564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:44,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1318704323] [2022-11-20 20:02:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:44,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:02:44,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:02:44,113 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:02:44,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-20 20:02:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:48,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:02:48,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2022-11-20 20:02:48,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2022-11-20 20:02:49,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1318704323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:49,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824007506] [2022-11-20 20:02:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:49,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:49,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:49,105 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:49,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 20:02:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:51,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2298 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:02:51,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-20 20:02:51,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:02:51,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824007506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:02:51,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-20 20:02:51,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 5, 5] total 11 [2022-11-20 20:02:51,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308022347] [2022-11-20 20:02:51,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:02:51,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:02:51,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:02:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:02:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:02:51,252 INFO L87 Difference]: Start difference. First operand 13266 states and 16943 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-20 20:02:53,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:53,487 INFO L93 Difference]: Finished difference Result 24510 states and 31855 transitions. [2022-11-20 20:02:53,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:02:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 388 [2022-11-20 20:02:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:53,521 INFO L225 Difference]: With dead ends: 24510 [2022-11-20 20:02:53,521 INFO L226 Difference]: Without dead ends: 11300 [2022-11-20 20:02:53,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1938 GetRequests, 1927 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:02:53,550 INFO L413 NwaCegarLoop]: 1878 mSDtfsCounter, 820 mSDsluCounter, 4654 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:53,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 6532 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:02:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11300 states. [2022-11-20 20:02:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11300 to 9127. [2022-11-20 20:02:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9127 states, 6314 states have (on average 1.2507127019322142) internal successors, (7897), 6434 states have internal predecessors, (7897), 1821 states have call successors, (1821), 992 states have call predecessors, (1821), 991 states have return successors, (1810), 1784 states have call predecessors, (1810), 1804 states have call successors, (1810) [2022-11-20 20:02:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9127 states to 9127 states and 11528 transitions. [2022-11-20 20:02:54,630 INFO L78 Accepts]: Start accepts. Automaton has 9127 states and 11528 transitions. Word has length 388 [2022-11-20 20:02:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:54,631 INFO L495 AbstractCegarLoop]: Abstraction has 9127 states and 11528 transitions. [2022-11-20 20:02:54,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-20 20:02:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 9127 states and 11528 transitions. [2022-11-20 20:02:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-11-20 20:02:54,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:54,637 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:02:54,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:54,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:55,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:55,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:02:55,238 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:55,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash -881212416, now seen corresponding path program 1 times [2022-11-20 20:02:55,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:02:55,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421173190] [2022-11-20 20:02:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:55,240 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 20:02:55,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:02:55,241 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:55,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:02:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:02:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-11-20 20:02:58,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2022-11-20 20:02:58,698 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:02:58,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421173190] [2022-11-20 20:02:58,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421173190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:58,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1777885336] [2022-11-20 20:02:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:58,699 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:02:58,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:02:58,700 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:02:58,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-20 20:03:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:01,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:03:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-11-20 20:03:02,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:02,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1777885336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:02,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:03:02,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5] total 14 [2022-11-20 20:03:02,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695864694] [2022-11-20 20:03:02,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:02,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:03:02,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:02,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:03:02,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:03:02,308 INFO L87 Difference]: Start difference. First operand 9127 states and 11528 transitions. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 7 states have internal predecessors, (162), 3 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (49), 4 states have call predecessors, (49), 3 states have call successors, (49) [2022-11-20 20:03:04,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:03:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:09,423 INFO L93 Difference]: Finished difference Result 21716 states and 27465 transitions. [2022-11-20 20:03:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:03:09,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 7 states have internal predecessors, (162), 3 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (49), 4 states have call predecessors, (49), 3 states have call successors, (49) Word has length 439 [2022-11-20 20:03:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:09,450 INFO L225 Difference]: With dead ends: 21716 [2022-11-20 20:03:09,450 INFO L226 Difference]: Without dead ends: 12645 [2022-11-20 20:03:09,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1324 GetRequests, 1304 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:03:09,463 INFO L413 NwaCegarLoop]: 2466 mSDtfsCounter, 1666 mSDsluCounter, 13014 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 279 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 15480 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:09,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1685 Valid, 15480 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 507 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 20:03:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12645 states. [2022-11-20 20:03:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12645 to 9157. [2022-11-20 20:03:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 6320 states have (on average 1.2504746835443037) internal successors, (7903), 6440 states have internal predecessors, (7903), 1845 states have call successors, (1845), 992 states have call predecessors, (1845), 991 states have return successors, (1834), 1808 states have call predecessors, (1834), 1828 states have call successors, (1834) [2022-11-20 20:03:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 11582 transitions. [2022-11-20 20:03:10,585 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 11582 transitions. Word has length 439 [2022-11-20 20:03:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:10,586 INFO L495 AbstractCegarLoop]: Abstraction has 9157 states and 11582 transitions. [2022-11-20 20:03:10,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 7 states have internal predecessors, (162), 3 states have call successors, (51), 2 states have call predecessors, (51), 3 states have return successors, (49), 4 states have call predecessors, (49), 3 states have call successors, (49) [2022-11-20 20:03:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 11582 transitions. [2022-11-20 20:03:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-11-20 20:03:10,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:10,593 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:10,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:03:10,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:10,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:10,996 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:03:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2124222845, now seen corresponding path program 1 times [2022-11-20 20:03:10,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:10,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717194217] [2022-11-20 20:03:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:10,999 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 20:03:10,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:11,000 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:03:11,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 20:03:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 3645 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:03:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2022-11-20 20:03:14,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2022-11-20 20:03:15,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:15,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717194217] [2022-11-20 20:03:15,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717194217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:15,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1886319444] [2022-11-20 20:03:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:15,359 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:15,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:03:15,360 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:03:15,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-20 20:03:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:18,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 3645 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:03:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2022-11-20 20:03:19,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:19,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1886319444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:19,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:03:19,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2022-11-20 20:03:19,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773165356] [2022-11-20 20:03:19,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:19,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:03:19,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:03:19,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:03:19,209 INFO L87 Difference]: Start difference. First operand 9157 states and 11582 transitions. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-20 20:03:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:20,531 INFO L93 Difference]: Finished difference Result 18360 states and 23261 transitions. [2022-11-20 20:03:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:03:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 535 [2022-11-20 20:03:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:20,549 INFO L225 Difference]: With dead ends: 18360 [2022-11-20 20:03:20,549 INFO L226 Difference]: Without dead ends: 9259 [2022-11-20 20:03:20,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1604 GetRequests, 1593 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:03:20,563 INFO L413 NwaCegarLoop]: 1441 mSDtfsCounter, 14 mSDsluCounter, 4302 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 5743 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:20,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 5743 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:03:20,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9259 states. [2022-11-20 20:03:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9259 to 9175. [2022-11-20 20:03:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9175 states, 6338 states have (on average 1.2497633322814767) internal successors, (7921), 6458 states have internal predecessors, (7921), 1845 states have call successors, (1845), 992 states have call predecessors, (1845), 991 states have return successors, (1834), 1808 states have call predecessors, (1834), 1828 states have call successors, (1834) [2022-11-20 20:03:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9175 states to 9175 states and 11600 transitions. [2022-11-20 20:03:21,679 INFO L78 Accepts]: Start accepts. Automaton has 9175 states and 11600 transitions. Word has length 535 [2022-11-20 20:03:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:21,679 INFO L495 AbstractCegarLoop]: Abstraction has 9175 states and 11600 transitions. [2022-11-20 20:03:21,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 2 states have call successors, (57), 2 states have call predecessors, (57), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-20 20:03:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 9175 states and 11600 transitions. [2022-11-20 20:03:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-11-20 20:03:21,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:21,687 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:21,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:21,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:22,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:22,088 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:03:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1861338268, now seen corresponding path program 1 times [2022-11-20 20:03:22,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:22,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344492713] [2022-11-20 20:03:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:22,090 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 20:03:22,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:22,091 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:03:22,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 20:03:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:25,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 3652 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:03:25,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 358 proven. 1 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2022-11-20 20:03:25,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2022-11-20 20:03:26,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344492713] [2022-11-20 20:03:26,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344492713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426954849] [2022-11-20 20:03:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:26,468 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:26,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:03:26,469 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:03:26,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-20 20:03:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 3652 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:03:30,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2022-11-20 20:03:31,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:31,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426954849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:31,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:03:31,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 16 [2022-11-20 20:03:31,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793727969] [2022-11-20 20:03:31,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:31,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:03:31,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:31,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:03:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:03:31,351 INFO L87 Difference]: Start difference. First operand 9175 states and 11600 transitions. Second operand has 10 states, 10 states have (on average 19.3) internal successors, (193), 8 states have internal predecessors, (193), 3 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (55), 5 states have call predecessors, (55), 3 states have call successors, (55) [2022-11-20 20:03:35,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:03:37,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:03:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:38,295 INFO L93 Difference]: Finished difference Result 18414 states and 23307 transitions. [2022-11-20 20:03:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:03:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.3) internal successors, (193), 8 states have internal predecessors, (193), 3 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (55), 5 states have call predecessors, (55), 3 states have call successors, (55) Word has length 537 [2022-11-20 20:03:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:38,313 INFO L225 Difference]: With dead ends: 18414 [2022-11-20 20:03:38,313 INFO L226 Difference]: Without dead ends: 9295 [2022-11-20 20:03:38,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1610 GetRequests, 1594 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:03:38,325 INFO L413 NwaCegarLoop]: 1433 mSDtfsCounter, 367 mSDsluCounter, 10921 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 12354 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:38,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 12354 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-11-20 20:03:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2022-11-20 20:03:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 9229. [2022-11-20 20:03:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9229 states, 6380 states have (on average 1.2481191222570533) internal successors, (7963), 6500 states have internal predecessors, (7963), 1845 states have call successors, (1845), 992 states have call predecessors, (1845), 1003 states have return successors, (1886), 1820 states have call predecessors, (1886), 1828 states have call successors, (1886) [2022-11-20 20:03:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9229 states to 9229 states and 11694 transitions. [2022-11-20 20:03:39,318 INFO L78 Accepts]: Start accepts. Automaton has 9229 states and 11694 transitions. Word has length 537 [2022-11-20 20:03:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:39,318 INFO L495 AbstractCegarLoop]: Abstraction has 9229 states and 11694 transitions. [2022-11-20 20:03:39,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.3) internal successors, (193), 8 states have internal predecessors, (193), 3 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (55), 5 states have call predecessors, (55), 3 states have call successors, (55) [2022-11-20 20:03:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 9229 states and 11694 transitions. [2022-11-20 20:03:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2022-11-20 20:03:39,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:39,330 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:39,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:39,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:39,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:03:39,747 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:03:39,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1517803768, now seen corresponding path program 1 times [2022-11-20 20:03:39,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:39,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746273509] [2022-11-20 20:03:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:39,750 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 20:03:39,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:39,751 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:03:39,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-20 20:03:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 3754 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:03:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 526 proven. 1 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2022-11-20 20:03:43,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2022-11-20 20:03:44,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:44,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746273509] [2022-11-20 20:03:44,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746273509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1769995656] [2022-11-20 20:03:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:44,507 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:44,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:03:44,510 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:03:44,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-20 20:03:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:48,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 3754 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:03:48,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:49,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:03:49,971 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 66 treesize of output 22 [2022-11-20 20:03:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1554 trivial. 0 not checked. [2022-11-20 20:03:50,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:50,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1769995656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:50,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:03:50,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-20 20:03:50,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120167433] [2022-11-20 20:03:50,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:50,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:03:50,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:03:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:03:50,141 INFO L87 Difference]: Start difference. First operand 9229 states and 11694 transitions. Second operand has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 3 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-20 20:03:52,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:03:54,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:01,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:03,660 WARN L539 Checker$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 20:04:05,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:07,448 WARN L539 Checker$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 20:04:11,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:13,596 WARN L539 Checker$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 20:04:15,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:17,692 WARN L539 Checker$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 20:04:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:21,049 INFO L93 Difference]: Finished difference Result 18535 states and 23484 transitions. [2022-11-20 20:04:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:21,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 3 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 573 [2022-11-20 20:04:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:21,085 INFO L225 Difference]: With dead ends: 18535 [2022-11-20 20:04:21,085 INFO L226 Difference]: Without dead ends: 9362 [2022-11-20 20:04:21,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1717 GetRequests, 1701 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:04:21,104 INFO L413 NwaCegarLoop]: 1447 mSDtfsCounter, 14 mSDsluCounter, 5430 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 6877 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 29.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:21,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 6877 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 8 Unknown, 124 Unchecked, 29.5s Time] [2022-11-20 20:04:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9362 states. [2022-11-20 20:04:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9362 to 9362. [2022-11-20 20:04:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9362 states, 6459 states have (on average 1.246013314754606) internal successors, (8048), 6578 states have internal predecessors, (8048), 1882 states have call successors, (1882), 1008 states have call predecessors, (1882), 1020 states have return successors, (1925), 1859 states have call predecessors, (1925), 1867 states have call successors, (1925) [2022-11-20 20:04:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9362 states to 9362 states and 11855 transitions. [2022-11-20 20:04:22,313 INFO L78 Accepts]: Start accepts. Automaton has 9362 states and 11855 transitions. Word has length 573 [2022-11-20 20:04:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:22,313 INFO L495 AbstractCegarLoop]: Abstraction has 9362 states and 11855 transitions. [2022-11-20 20:04:22,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 3 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-20 20:04:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9362 states and 11855 transitions. [2022-11-20 20:04:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2022-11-20 20:04:22,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:22,323 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:22,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:22,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:22,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:04:22,724 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:04:22,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash 556245272, now seen corresponding path program 1 times [2022-11-20 20:04:22,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:22,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625400595] [2022-11-20 20:04:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:22,726 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 20:04:22,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:22,727 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:04:22,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 20:04:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:26,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 3735 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:04:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 386 proven. 1 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2022-11-20 20:04:26,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2022-11-20 20:04:27,779 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:27,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625400595] [2022-11-20 20:04:27,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625400595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:27,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2097993220] [2022-11-20 20:04:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:27,780 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:04:27,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:04:27,783 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:04:27,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-20 20:04:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:32,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 3735 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:04:32,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:36,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:04:36,603 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 65 treesize of output 21 [2022-11-20 20:04:38,627 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_5 (_ BitVec 8)) (v_arrayElimCell_8 (_ BitVec 8)) (v_arrayElimCell_7 (_ BitVec 8)) (v_arrayElimCell_6 (_ BitVec 8))) (let ((.cse0 (concat (concat (concat v_arrayElimCell_6 v_arrayElimCell_8) v_arrayElimCell_5) v_arrayElimCell_7))) (and (= (bvand .cse0 (_ bv1024 32)) (_ bv0 32)) (= .cse0 |c_ULTIMATE.start_wdm_suspend_#t~mem459#1|)))) is different from true [2022-11-20 20:04:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2022-11-20 20:04:38,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:38,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2097993220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:38,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:04:38,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-20 20:04:38,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534283578] [2022-11-20 20:04:38,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:38,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:04:38,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:38,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:04:38,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=82, Unknown=1, NotChecked=18, Total=132 [2022-11-20 20:04:38,633 INFO L87 Difference]: Start difference. First operand 9362 states and 11855 transitions. Second operand has 6 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 3 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2022-11-20 20:04:40,759 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 20:04:42,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:46,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:49,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:52,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:54,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:56,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:04:57,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:05:02,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:05:04,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:05:07,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:05:08,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:05:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:14,470 INFO L93 Difference]: Finished difference Result 23655 states and 30085 transitions. [2022-11-20 20:05:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:14,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 3 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) Word has length 578 [2022-11-20 20:05:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:14,651 INFO L225 Difference]: With dead ends: 23655 [2022-11-20 20:05:14,651 INFO L226 Difference]: Without dead ends: 14349 [2022-11-20 20:05:14,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1732 GetRequests, 1712 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=35, Invalid=99, Unknown=2, NotChecked=20, Total=156 [2022-11-20 20:05:14,672 INFO L413 NwaCegarLoop]: 2092 mSDtfsCounter, 689 mSDsluCounter, 4832 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 6924 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 2828 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:14,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 6924 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 9 Unknown, 2828 Unchecked, 31.5s Time] [2022-11-20 20:05:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14349 states. [2022-11-20 20:05:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14349 to 13841. [2022-11-20 20:05:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13841 states, 9747 states have (on average 1.2669539345439622) internal successors, (12349), 9936 states have internal predecessors, (12349), 2621 states have call successors, (2621), 1459 states have call predecessors, (2621), 1472 states have return successors, (2700), 2557 states have call predecessors, (2700), 2600 states have call successors, (2700) [2022-11-20 20:05:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13841 states to 13841 states and 17670 transitions. [2022-11-20 20:05:16,463 INFO L78 Accepts]: Start accepts. Automaton has 13841 states and 17670 transitions. Word has length 578 [2022-11-20 20:05:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:16,464 INFO L495 AbstractCegarLoop]: Abstraction has 13841 states and 17670 transitions. [2022-11-20 20:05:16,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 3 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2022-11-20 20:05:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 13841 states and 17670 transitions. [2022-11-20 20:05:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2022-11-20 20:05:16,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:16,474 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:16,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-20 20:05:16,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-20 20:05:16,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:05:16,875 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:05:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash -230152243, now seen corresponding path program 1 times [2022-11-20 20:05:16,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:16,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739680605] [2022-11-20 20:05:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:16,878 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 20:05:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:16,879 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:05:16,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 20:05:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 3821 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:05:20,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 386 proven. 1 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-11-20 20:05:21,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1230 trivial. 0 not checked. [2022-11-20 20:05:22,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739680605] [2022-11-20 20:05:22,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739680605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [396926723] [2022-11-20 20:05:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:22,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:05:22,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:05:22,078 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:05:22,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-20 20:05:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 3821 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 20:05:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2022-11-20 20:05:41,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2022-11-20 20:05:48,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [396926723] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:05:48,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:05:48,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5, 17] total 33 [2022-11-20 20:05:48,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914877441] [2022-11-20 20:05:48,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:48,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 20:05:48,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 20:05:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 20:05:48,910 INFO L87 Difference]: Start difference. First operand 13841 states and 17670 transitions. Second operand has 11 states, 11 states have (on average 20.454545454545453) internal successors, (225), 10 states have internal predecessors, (225), 6 states have call successors, (67), 2 states have call predecessors, (67), 4 states have return successors, (66), 8 states have call predecessors, (66), 5 states have call successors, (66) [2022-11-20 20:05:51,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:05:53,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:05:55,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:05:57,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:05:59,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:06:01,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:07:00,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:07:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:07:12,353 INFO L93 Difference]: Finished difference Result 45308 states and 59498 transitions. [2022-11-20 20:07:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 20:07:12,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.454545454545453) internal successors, (225), 10 states have internal predecessors, (225), 6 states have call successors, (67), 2 states have call predecessors, (67), 4 states have return successors, (66), 8 states have call predecessors, (66), 5 states have call successors, (66) Word has length 613 [2022-11-20 20:07:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:07:12,460 INFO L225 Difference]: With dead ends: 45308 [2022-11-20 20:07:12,461 INFO L226 Difference]: Without dead ends: 31523 [2022-11-20 20:07:12,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2457 GetRequests, 2417 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 20:07:12,503 INFO L413 NwaCegarLoop]: 2075 mSDtfsCounter, 1895 mSDsluCounter, 9568 mSDsCounter, 0 mSdLazyCounter, 4726 mSolverCounterSat, 127 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1905 SdHoareTripleChecker+Valid, 11643 SdHoareTripleChecker+Invalid, 4859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4726 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:07:12,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1905 Valid, 11643 Invalid, 4859 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [127 Valid, 4726 Invalid, 6 Unknown, 0 Unchecked, 74.1s Time] [2022-11-20 20:07:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31523 states. [2022-11-20 20:07:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31523 to 27793. [2022-11-20 20:07:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27793 states, 19538 states have (on average 1.2687583171256014) internal successors, (24789), 19930 states have internal predecessors, (24789), 5307 states have call successors, (5307), 2900 states have call predecessors, (5307), 2947 states have return successors, (5717), 5186 states have call predecessors, (5717), 5274 states have call successors, (5717) [2022-11-20 20:07:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27793 states to 27793 states and 35813 transitions. [2022-11-20 20:07:17,069 INFO L78 Accepts]: Start accepts. Automaton has 27793 states and 35813 transitions. Word has length 613 [2022-11-20 20:07:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:07:17,070 INFO L495 AbstractCegarLoop]: Abstraction has 27793 states and 35813 transitions. [2022-11-20 20:07:17,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.454545454545453) internal successors, (225), 10 states have internal predecessors, (225), 6 states have call successors, (67), 2 states have call predecessors, (67), 4 states have return successors, (66), 8 states have call predecessors, (66), 5 states have call successors, (66) [2022-11-20 20:07:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 27793 states and 35813 transitions. [2022-11-20 20:07:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2022-11-20 20:07:17,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:07:17,085 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:07:17,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-20 20:07:17,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-20 20:07:17,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:07:17,486 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:07:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:07:17,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1915635138, now seen corresponding path program 1 times [2022-11-20 20:07:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:07:17,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971156630] [2022-11-20 20:07:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:07:17,491 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 20:07:17,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:07:17,492 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:07:17,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 20:07:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:07:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 3907 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:07:21,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:07:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 526 proven. 1 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2022-11-20 20:07:22,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:07:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2022-11-20 20:07:23,131 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:07:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971156630] [2022-11-20 20:07:23,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971156630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:07:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2080063479] [2022-11-20 20:07:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:07:23,132 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:07:23,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:07:23,133 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:07:23,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-20 20:07:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:07:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 3907 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:07:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:07:40,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:07:40,374 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 65 treesize of output 21 [2022-11-20 20:07:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1566 trivial. 0 not checked. [2022-11-20 20:07:43,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:07:43,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2080063479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:07:43,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:07:43,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-20 20:07:43,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13827237] [2022-11-20 20:07:43,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:07:43,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:07:43,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:07:43,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:07:43,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=100, Unknown=1, NotChecked=0, Total=132 [2022-11-20 20:07:43,448 INFO L87 Difference]: Start difference. First operand 27793 states and 35813 transitions. Second operand has 6 states, 6 states have (on average 37.833333333333336) internal successors, (227), 6 states have internal predecessors, (227), 4 states have call successors, (67), 3 states have call predecessors, (67), 2 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2022-11-20 20:07:45,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:07:47,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:07:53,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:07:55,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:07:57,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:07:59,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:08:01,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:08:03,375 WARN L539 Checker$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 20:08:07,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:08:09,839 WARN L539 Checker$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 20:08:12,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 20:08:14,111 WARN L539 Checker$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 20:08:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:18,240 INFO L93 Difference]: Finished difference Result 28085 states and 36107 transitions. [2022-11-20 20:08:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:08:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 37.833333333333336) internal successors, (227), 6 states have internal predecessors, (227), 4 states have call successors, (67), 3 states have call predecessors, (67), 2 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) Word has length 645 [2022-11-20 20:08:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:18,251 INFO L225 Difference]: With dead ends: 28085 [2022-11-20 20:08:18,251 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 20:08:18,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1933 GetRequests, 1905 SyntacticMatches, 17 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=36, Invalid=119, Unknown=1, NotChecked=0, Total=156 [2022-11-20 20:08:18,293 INFO L413 NwaCegarLoop]: 1437 mSDtfsCounter, 10 mSDsluCounter, 5367 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6804 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:18,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 6804 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 11 Unknown, 131 Unchecked, 32.2s Time] [2022-11-20 20:08:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 20:08:18,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 20:08:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:08:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 20:08:18,297 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 645 [2022-11-20 20:08:18,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:18,298 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 20:08:18,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.833333333333336) internal successors, (227), 6 states have internal predecessors, (227), 4 states have call successors, (67), 3 states have call predecessors, (67), 2 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2022-11-20 20:08:18,298 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 20:08:18,298 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 20:08:18,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 20:08:18,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-11-20 20:08:18,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-20 20:08:18,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_301efd33-f977-428a-a82e-354d3ecfe20a/bin/utaipan-6cKwYrpEi9/mathsat -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 20:08:18,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 20:09:33,117 WARN L233 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 250 DAG size of output: 54 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:09:42,984 WARN L233 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 349 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:10:20,678 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 185 DAG size of output: 55 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:10:27,134 WARN L233 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 218 DAG size of output: 30 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:10:47,742 WARN L233 SmtUtils]: Spent 15.38s on a formula simplification. DAG size of input: 442 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:10:55,485 WARN L233 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 218 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:11:18,548 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 218 DAG size of output: 30 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:11:42,613 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 218 DAG size of output: 30 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:12:08,050 WARN L233 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 214 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:12:23,489 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 218 DAG size of output: 30 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 20:12:31,521 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 218 DAG size of output: 30 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)