./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c --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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/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 60c3d2234c070d60bd740c384fa36522b99de9d64a4beaa165b9f8f11880fcc7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:38:06,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:38:06,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:38:06,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:38:06,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:38:06,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:38:06,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:38:06,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:38:06,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:38:06,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:38:06,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:38:06,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:38:06,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:38:06,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:38:06,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:38:06,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:38:06,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:38:06,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:38:06,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:38:06,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:38:06,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:38:06,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:38:06,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:38:06,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:38:06,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:38:06,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:38:06,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:38:06,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:38:06,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:38:06,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:38:06,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:38:06,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:38:06,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:38:06,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:38:06,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:38:06,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:38:06,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:38:06,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:38:06,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:38:06,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:38:06,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:38:06,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 20:38:06,409 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:38:06,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:38:06,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:38:06,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:38:06,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:38:06,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:38:06,412 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:38:06,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:38:06,412 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:38:06,413 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:38:06,413 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:38:06,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:38:06,414 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:38:06,414 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:38:06,414 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:38:06,415 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:38:06,415 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:38:06,415 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:38:06,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:38:06,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:38:06,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:38:06,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:38:06,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:38:06,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:38:06,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:38:06,418 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:38:06,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:38:06,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:38:06,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:38:06,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:38:06,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:38:06,420 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:38:06,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:38:06,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:38:06,420 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:38:06,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:38:06,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:38:06,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:38:06,421 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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60c3d2234c070d60bd740c384fa36522b99de9d64a4beaa165b9f8f11880fcc7 [2022-11-20 20:38:06,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:38:06,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:38:06,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:38:06,787 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:38:06,788 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:38:06,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c [2022-11-20 20:38:10,148 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:38:10,609 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:38:10,610 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c [2022-11-20 20:38:10,630 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/data/2cc5aaff9/d7d03540f3c8473a9681202159a3391f/FLAGf1788de2e [2022-11-20 20:38:10,645 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/data/2cc5aaff9/d7d03540f3c8473a9681202159a3391f [2022-11-20 20:38:10,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:38:10,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:38:10,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:38:10,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:38:10,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:38:10,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:38:10" (1/1) ... [2022-11-20 20:38:10,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb967c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:10, skipping insertion in model container [2022-11-20 20:38:10,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:38:10" (1/1) ... [2022-11-20 20:38:10,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:38:10,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:38:11,060 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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c[1014,1027] [2022-11-20 20:38:11,288 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: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:728) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:282) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java: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:1126) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:276) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:728) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:282) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1413) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:220) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1087) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleLoops(CHandler.java:3466) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1456) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:223) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1087) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1489) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:155) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3314) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2388) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:600) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:192) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 20:38:11,308 INFO L158 Benchmark]: Toolchain (without parser) took 653.42ms. Allocated memory is still 180.4MB. Free memory was 141.7MB in the beginning and 137.2MB in the end (delta: 4.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 20:38:11,309 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 130.0MB. Free memory is still 98.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:38:11,309 INFO L158 Benchmark]: CACSL2BoogieTranslator took 647.68ms. Allocated memory is still 180.4MB. Free memory was 140.7MB in the beginning and 137.2MB in the end (delta: 3.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 20:38:11,311 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 130.0MB. Free memory is still 98.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 647.68ms. Allocated memory is still 180.4MB. Free memory was 140.7MB in the beginning and 137.2MB in the end (delta: 3.5MB). Peak memory consumption was 12.6MB. 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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/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 60c3d2234c070d60bd740c384fa36522b99de9d64a4beaa165b9f8f11880fcc7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:38:13,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:38:13,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:38:13,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:38:13,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:38:13,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:38:13,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:38:13,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:38:13,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:38:13,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:38:13,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:38:13,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:38:13,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:38:13,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:38:13,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:38:13,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:38:13,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:38:13,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:38:13,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:38:13,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:38:13,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:38:13,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:38:13,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:38:13,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:38:13,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:38:13,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:38:13,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:38:13,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:38:13,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:38:13,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:38:13,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:38:13,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:38:14,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:38:14,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:38:14,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:38:14,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:38:14,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:38:14,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:38:14,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:38:14,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:38:14,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:38:14,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-20 20:38:14,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:38:14,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:38:14,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:38:14,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:38:14,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:38:14,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:38:14,060 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:38:14,060 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:38:14,061 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:38:14,061 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:38:14,062 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:38:14,062 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:38:14,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:38:14,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:38:14,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:38:14,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:38:14,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:38:14,065 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:38:14,065 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:38:14,065 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:38:14,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:38:14,065 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:38:14,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:38:14,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:38:14,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:38:14,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:38:14,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:38:14,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:38:14,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:38:14,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:38:14,068 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:38:14,068 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:38:14,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:38:14,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:38:14,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:38:14,069 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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60c3d2234c070d60bd740c384fa36522b99de9d64a4beaa165b9f8f11880fcc7 [2022-11-20 20:38:14,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:38:14,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:38:14,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:38:14,459 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:38:14,460 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:38:14,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c [2022-11-20 20:38:17,848 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:38:18,326 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:38:18,329 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c [2022-11-20 20:38:18,358 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/data/d5e7856b8/996e611b059f453b93b35d9f291818d9/FLAG19e326987 [2022-11-20 20:38:18,381 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/data/d5e7856b8/996e611b059f453b93b35d9f291818d9 [2022-11-20 20:38:18,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:38:18,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:38:18,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:38:18,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:38:18,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:38:18,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:38:18" (1/1) ... [2022-11-20 20:38:18,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f6a5dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:18, skipping insertion in model container [2022-11-20 20:38:18,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:38:18" (1/1) ... [2022-11-20 20:38:18,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:38:18,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:38:18,783 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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c[1014,1027] [2022-11-20 20:38:19,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:38:19,351 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:38:19,364 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_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.6.prop3-back-serstep.c[1014,1027] [2022-11-20 20:38:19,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:38:19,582 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:38:19,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19 WrapperNode [2022-11-20 20:38:19,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:38:19,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:38:19,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:38:19,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:38:19,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,832 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3195 [2022-11-20 20:38:19,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:38:19,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:38:19,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:38:19,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:38:19,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,940 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:38:19,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:38:19,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:38:19,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:38:19,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (1/1) ... [2022-11-20 20:38:19,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:38:20,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:20,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:38:20,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:38:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:38:20,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:38:20,905 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:38:20,909 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:38:30,079 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:38:30,087 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:38:30,088 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:38:30,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:38:30 BoogieIcfgContainer [2022-11-20 20:38:30,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:38:30,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:38:30,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:38:30,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:38:30,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:38:18" (1/3) ... [2022-11-20 20:38:30,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350224a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:38:30, skipping insertion in model container [2022-11-20 20:38:30,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:19" (2/3) ... [2022-11-20 20:38:30,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350224a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:38:30, skipping insertion in model container [2022-11-20 20:38:30,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:38:30" (3/3) ... [2022-11-20 20:38:30,102 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.brp2.6.prop3-back-serstep.c [2022-11-20 20:38:30,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:38:30,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:38:30,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:38:30,216 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;@7aacf191, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:38:30,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:38:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 20:38:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:38:30,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:30,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:38:30,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:30,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:30,242 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-20 20:38:30,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:38:30,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103794625] [2022-11-20 20:38:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:30,265 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 20:38:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:38:30,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -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 20:38:30,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 20:38:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:31,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:38:31,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:31,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:38:31,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:38:31,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103794625] [2022-11-20 20:38:31,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103794625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:38:31,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:38:31,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:38:31,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621358174] [2022-11-20 20:38:31,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:38:31,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:38:31,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:38:31,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:38:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:38:31,449 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 20:38:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:38:32,390 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-20 20:38:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:38:32,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) Word has length 5 [2022-11-20 20:38:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:38:32,405 INFO L225 Difference]: With dead ends: 20 [2022-11-20 20:38:32,406 INFO L226 Difference]: Without dead ends: 11 [2022-11-20 20:38:32,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 20:38:32,414 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:38:32,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:38:32,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-20 20:38:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-20 20:38:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 20:38:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-20 20:38:32,455 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-20 20:38:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:38:32,456 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-20 20:38:32,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 20:38:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-20 20:38:32,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:38:32,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:32,458 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:32,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:38:32,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -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 20:38:32,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-20 20:38:32,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:38:32,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647918913] [2022-11-20 20:38:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:32,679 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 20:38:32,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:38:32,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -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 20:38:32,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 20:38:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 2869 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 20:38:34,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:35,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:36,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:38:36,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647918913] [2022-11-20 20:38:36,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647918913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:38:36,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1468679330] [2022-11-20 20:38:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:36,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:38:36,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:38:36,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:38:36,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-20 20:38:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:40,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 2869 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 20:38:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:40,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:45,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1468679330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:38:45,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935713858] [2022-11-20 20:38:45,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:45,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:45,271 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:38:45,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:38:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:46,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2869 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-20 20:38:46,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:47,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:58,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935713858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:38:58,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:38:58,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 12 [2022-11-20 20:38:58,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124536290] [2022-11-20 20:38:58,460 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:38:58,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:38:58,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:38:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:38:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=91, Unknown=7, NotChecked=0, Total=132 [2022-11-20 20:38:58,463 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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 20:39:00,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:39:00,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:39:00,901 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-20 20:39:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:39:00,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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) Word has length 8 [2022-11-20 20:39:00,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:39:00,903 INFO L225 Difference]: With dead ends: 15 [2022-11-20 20:39:00,903 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 20:39:00,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=44, Invalid=105, Unknown=7, NotChecked=0, Total=156 [2022-11-20 20:39:00,905 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:39:00,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 1 Unknown, 11 Unchecked, 2.4s Time] [2022-11-20 20:39:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 20:39:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-20 20:39:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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 20:39:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-20 20:39:00,914 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-20 20:39:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:39:00,914 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-20 20:39:00,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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 20:39:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-20 20:39:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:39:00,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:39:00,916 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 20:39:00,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:39:01,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -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 20:39:01,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2022-11-20 20:39:01,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:39:01,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:39:01,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:39:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-20 20:39:01,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:39:01,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842890432] [2022-11-20 20:39:01,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:39:01,548 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 20:39:01,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:39:01,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -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 20:39:01,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 20:39:04,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:39:04,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:39:04,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 5349 conjuncts, 337 conjunts are in the unsatisfiable core [2022-11-20 20:39:04,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:39:14,724 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 584 DAG size of output: 570 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:39:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:17,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:40:11,414 WARN L233 SmtUtils]: Spent 41.05s on a formula simplification. DAG size of input: 774 DAG size of output: 764 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:40:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:40:21,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:40:21,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842890432] [2022-11-20 20:40:21,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842890432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:40:21,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1447914635] [2022-11-20 20:40:21,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:40:21,742 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:40:21,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:40:21,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:40:21,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-20 20:40:26,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:40:26,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:40:26,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 5349 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-20 20:40:26,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:40:56,919 WARN L233 SmtUtils]: Spent 17.92s on a formula simplification. DAG size of input: 665 DAG size of output: 651 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:40:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:40:59,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:13,464 WARN L233 SmtUtils]: Spent 44.53s on a formula simplification. DAG size of input: 903 DAG size of output: 893 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:42:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:24,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1447914635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587219210] [2022-11-20 20:42:24,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:42:24,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:42:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:42:24,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:42:24,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:42:26,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:42:26,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:42:26,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 5349 conjuncts, 388 conjunts are in the unsatisfiable core [2022-11-20 20:42:26,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:01,976 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 640 DAG size of output: 626 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:43:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:03,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:37,695 WARN L233 SmtUtils]: Spent 54.15s on a formula simplification. DAG size of input: 865 DAG size of output: 855 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:45:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:06,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587219210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:06,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:45:06,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 20 [2022-11-20 20:45:06,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952365482] [2022-11-20 20:45:06,560 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:45:06,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:45:06,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:45:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:45:06,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=306, Unknown=13, NotChecked=0, Total=380 [2022-11-20 20:45:06,563 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 20:45:32,676 WARN L233 SmtUtils]: Spent 10.81s on a formula simplification that was a NOOP. DAG size: 1400 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:45:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:45:32,742 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-20 20:45:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:45:32,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) Word has length 11 [2022-11-20 20:45:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:45:32,744 INFO L225 Difference]: With dead ends: 17 [2022-11-20 20:45:32,744 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 20:45:32,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 345.1s TimeCoverageRelationStatistics Valid=88, Invalid=405, Unknown=13, NotChecked=0, Total=506 [2022-11-20 20:45:32,746 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:45:32,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-11-20 20:45:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 20:45:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 20:45:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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 20:45:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-20 20:45:32,757 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2022-11-20 20:45:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:45:32,758 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-20 20:45:32,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 20:45:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-20 20:45:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:45:32,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:45:32,759 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2022-11-20 20:45:32,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:33,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:33,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:45:33,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:45:33,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:45:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:45:33,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1580781475, now seen corresponding path program 3 times [2022-11-20 20:45:33,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:45:33,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285851937] [2022-11-20 20:45:33,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:45:33,387 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 20:45:33,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:45:33,388 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -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 20:45:33,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca6ac3f9-2f83-45f9-855b-884c2e6dcfb3/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 20:45:37,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:45:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:45:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 7829 conjuncts, 837 conjunts are in the unsatisfiable core [2022-11-20 20:45:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:46:28,603 WARN L233 SmtUtils]: Spent 45.46s on a formula simplification. DAG size of input: 850 DAG size of output: 827 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:46:44,930 WARN L233 SmtUtils]: Spent 12.30s on a formula simplification that was a NOOP. DAG size: 834 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)