./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.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_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/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_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.prop3-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/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_a01b83a7-a5c5-4b81-991f-548edd3082ec/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 24d0238dabc700185d95d03de50be00973914b2a7c56a4f2c71ae732b3d879bd --- 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 20:16:09,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:16:09,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:16:09,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:16:09,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:16:09,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:16:09,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:16:09,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:16:09,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:16:09,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:16:09,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:16:09,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:16:09,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:16:09,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:16:09,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:16:09,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:16:09,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:16:09,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:16:09,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:16:09,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:16:09,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:16:09,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:16:09,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:16:09,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:16:09,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:16:09,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:16:09,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:16:09,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:16:09,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:16:09,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:16:09,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:16:09,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:16:09,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:16:09,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:16:09,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:16:09,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:16:09,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:16:09,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:16:09,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:16:09,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:16:09,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:16:09,408 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 20:16:09,446 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:16:09,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:16:09,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:16:09,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:16:09,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:16:09,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:16:09,457 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:16:09,457 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:16:09,457 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:16:09,458 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:16:09,459 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:16:09,459 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:16:09,459 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:16:09,460 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:16:09,460 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:16:09,460 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:16:09,460 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:16:09,460 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:16:09,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:16:09,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:16:09,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:16:09,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:16:09,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:16:09,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:16:09,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:16:09,464 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:16:09,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:16:09,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:16:09,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:16:09,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:16:09,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:16:09,466 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:16:09,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:16:09,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:16:09,467 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:16:09,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:16:09,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:16:09,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:16:09,467 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_a01b83a7-a5c5-4b81-991f-548edd3082ec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24d0238dabc700185d95d03de50be00973914b2a7c56a4f2c71ae732b3d879bd [2022-11-20 20:16:09,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:16:09,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:16:09,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:16:09,857 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:16:09,858 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:16:09,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.prop3-back-serstep.c [2022-11-20 20:16:13,069 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:16:13,525 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:16:13,526 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.prop3-back-serstep.c [2022-11-20 20:16:13,560 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/data/c1bf3a6c8/a78b780982154c9ab3ac7566b6fecf42/FLAGd298f7fcc [2022-11-20 20:16:13,576 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/data/c1bf3a6c8/a78b780982154c9ab3ac7566b6fecf42 [2022-11-20 20:16:13,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:16:13,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:16:13,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:16:13,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:16:13,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:16:13,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:16:13" (1/1) ... [2022-11-20 20:16:13,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbcf8d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:13, skipping insertion in model container [2022-11-20 20:16:13,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:16:13" (1/1) ... [2022-11-20 20:16:13,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:16:13,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:16:13,905 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_a01b83a7-a5c5-4b81-991f-548edd3082ec/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.prop3-back-serstep.c[1014,1027] [2022-11-20 20:16:14,089 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 20:16:14,095 INFO L158 Benchmark]: Toolchain (without parser) took 511.53ms. Allocated memory is still 161.5MB. Free memory was 123.0MB in the beginning and 99.4MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-20 20:16:14,096 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 161.5MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:16:14,097 INFO L158 Benchmark]: CACSL2BoogieTranslator took 505.12ms. Allocated memory is still 161.5MB. Free memory was 123.0MB in the beginning and 99.4MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-20 20:16:14,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 161.5MB. Free memory is still 106.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 505.12ms. Allocated memory is still 161.5MB. Free memory was 123.0MB in the beginning and 99.4MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. 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_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/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_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.prop3-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/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_a01b83a7-a5c5-4b81-991f-548edd3082ec/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 24d0238dabc700185d95d03de50be00973914b2a7c56a4f2c71ae732b3d879bd --- 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 20:16:16,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:16:16,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:16:16,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:16:16,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:16:16,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:16:16,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:16:16,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:16:16,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:16:16,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:16:16,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:16:16,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:16:16,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:16:16,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:16:16,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:16:16,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:16:16,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:16:16,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:16:16,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:16:16,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:16:16,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:16:16,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:16:16,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:16:16,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:16:16,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:16:16,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:16:16,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:16:16,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:16:16,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:16:16,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:16:16,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:16:16,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:16:16,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:16:16,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:16:16,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:16:16,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:16:16,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:16:16,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:16:16,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:16:16,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:16:16,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:16:16,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-20 20:16:16,536 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:16:16,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:16:16,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:16:16,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:16:16,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:16:16,539 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:16:16,539 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:16:16,539 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:16:16,539 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:16:16,540 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:16:16,540 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:16:16,540 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:16:16,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:16:16,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:16:16,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:16:16,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:16:16,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:16:16,542 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:16:16,542 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:16:16,543 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:16:16,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:16:16,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:16:16,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:16:16,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:16:16,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:16:16,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:16:16,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:16:16,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:16:16,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:16:16,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:16:16,545 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:16:16,546 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:16:16,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:16:16,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:16:16,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:16:16,546 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_a01b83a7-a5c5-4b81-991f-548edd3082ec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24d0238dabc700185d95d03de50be00973914b2a7c56a4f2c71ae732b3d879bd [2022-11-20 20:16:16,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:16:16,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:16:16,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:16:16,933 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:16:16,934 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:16:16,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.prop3-back-serstep.c [2022-11-20 20:16:20,195 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:16:20,578 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:16:20,579 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.prop3-back-serstep.c [2022-11-20 20:16:20,607 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/data/35fa7363c/a572d059dd884a549964f8c748014412/FLAGa10314838 [2022-11-20 20:16:20,626 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/data/35fa7363c/a572d059dd884a549964f8c748014412 [2022-11-20 20:16:20,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:16:20,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:16:20,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:16:20,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:16:20,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:16:20,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:16:20" (1/1) ... [2022-11-20 20:16:20,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f82cbe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:20, skipping insertion in model container [2022-11-20 20:16:20,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:16:20" (1/1) ... [2022-11-20 20:16:20,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:16:20,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:16:20,991 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_a01b83a7-a5c5-4b81-991f-548edd3082ec/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.prop3-back-serstep.c[1014,1027] [2022-11-20 20:16:21,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:16:21,499 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:16:21,514 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_a01b83a7-a5c5-4b81-991f-548edd3082ec/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.2.prop3-back-serstep.c[1014,1027] [2022-11-20 20:16:21,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:16:21,753 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:16:21,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21 WrapperNode [2022-11-20 20:16:21,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:16:21,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:16:21,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:16:21,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:16:21,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:21,811 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,018 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3192 [2022-11-20 20:16:22,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:16:22,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:16:22,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:16:22,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:16:22,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:16:22,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:16:22,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:16:22,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:16:22,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (1/1) ... [2022-11-20 20:16:22,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:16:22,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:22,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:16:22,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:16:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:16:22,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:16:23,064 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:16:23,066 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:16:30,265 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:16:30,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:16:30,273 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:16:30,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:16:30 BoogieIcfgContainer [2022-11-20 20:16:30,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:16:30,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:16:30,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:16:30,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:16:30,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:16:20" (1/3) ... [2022-11-20 20:16:30,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190056d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:16:30, skipping insertion in model container [2022-11-20 20:16:30,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:21" (2/3) ... [2022-11-20 20:16:30,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190056d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:16:30, skipping insertion in model container [2022-11-20 20:16:30,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:16:30" (3/3) ... [2022-11-20 20:16:30,286 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.brp2.2.prop3-back-serstep.c [2022-11-20 20:16:30,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:16:30,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:16:30,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:16:30,393 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;@506c0d54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:16:30,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:16:30,399 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 20:16:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:16:30,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:30,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:16:30,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-20 20:16:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:30,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095534405] [2022-11-20 20:16:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:30,441 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 20:16:30,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:30,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:16:30,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:16:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:31,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:16:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:31,423 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 20:16:31,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:31,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:31,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095534405] [2022-11-20 20:16:31,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095534405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:31,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:31,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:16:31,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982563444] [2022-11-20 20:16:31,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:31,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:16:31,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:31,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:16:31,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:16:31,496 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 20:16:33,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:16:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:33,634 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-20 20:16:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:16:33,638 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 20:16:33,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:33,647 INFO L225 Difference]: With dead ends: 20 [2022-11-20 20:16:33,647 INFO L226 Difference]: Without dead ends: 11 [2022-11-20 20:16:33,650 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 20:16:33,654 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:33,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 20:16:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-20 20:16:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-20 20:16:33,690 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 20:16:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-20 20:16:33,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-20 20:16:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:33,695 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-20 20:16:33,695 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 20:16:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-20 20:16:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:16:33,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:33,696 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:33,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:16:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:16:33,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:33,926 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-20 20:16:33,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:33,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580066323] [2022-11-20 20:16:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:33,932 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 20:16:33,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:33,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:16:33,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:16:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:35,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 2866 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 20:16:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:36,437 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 20:16:36,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:37,335 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 20:16:37,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:37,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580066323] [2022-11-20 20:16:37,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580066323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:37,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [246626926] [2022-11-20 20:16:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:37,337 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:16:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:16:37,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:16:37,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-20 20:16:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:40,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 2866 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 20:16:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:40,780 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 20:16:40,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:45,574 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 20:16:45,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [246626926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:45,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162232643] [2022-11-20 20:16:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:45,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:45,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:45,580 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:45,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:16:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 2866 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-20 20:16:47,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:47,402 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 20:16:47,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:17:00,630 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 20:17:00,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162232643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:17:00,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:17:00,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 12 [2022-11-20 20:17:00,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503714690] [2022-11-20 20:17:00,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:17:00,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:17:00,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:17:00,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:17:00,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=91, Unknown=8, NotChecked=0, Total=132 [2022-11-20 20:17:00,635 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 20:17:03,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:17:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:17:03,123 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-20 20:17:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:17:03,123 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 20:17:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:17:03,124 INFO L225 Difference]: With dead ends: 15 [2022-11-20 20:17:03,124 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 20:17:03,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=43, Invalid=105, Unknown=8, NotChecked=0, Total=156 [2022-11-20 20:17:03,126 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, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:17:03,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 1 Unknown, 11 Unchecked, 2.3s Time] [2022-11-20 20:17:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 20:17:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-20 20:17:03,130 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 20:17:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-20 20:17:03,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-20 20:17:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:17:03,131 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-20 20:17:03,132 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 20:17:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-20 20:17:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:17:03,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:17:03,133 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 20:17:03,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:17:03,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:17:03,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:17:03,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:17:03,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:17:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:17:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-20 20:17:03,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:17:03,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738000740] [2022-11-20 20:17:03,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:17:03,755 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 20:17:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:17:03,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:17:03,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:17:06,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:17:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:17:06,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 5346 conjuncts, 319 conjunts are in the unsatisfiable core [2022-11-20 20:17:06,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:17:48,293 WARN L233 SmtUtils]: Spent 35.38s on a formula simplification. DAG size of input: 801 DAG size of output: 787 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:17:50,162 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 20:17:50,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:41,803 WARN L233 SmtUtils]: Spent 3.58m on a formula simplification. DAG size of input: 935 DAG size of output: 934 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:22:34,256 WARN L233 SmtUtils]: Spent 35.39s on a formula simplification. DAG size of input: 1562 DAG size of output: 1183 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:22:35,493 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 20:22:35,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:22:35,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738000740] [2022-11-20 20:22:35,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738000740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:22:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776415692] [2022-11-20 20:22:35,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:22:35,494 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:22:35,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:22:35,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:22:35,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-20 20:22:40,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:22:40,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:22:40,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 5346 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-20 20:22:40,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:23:10,912 WARN L233 SmtUtils]: Spent 10.86s 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 20:23:13,496 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 20:23:13,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:24:45,327 WARN L233 SmtUtils]: Spent 58.94s 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 20:25:10,648 WARN L233 SmtUtils]: Spent 9.79s on a formula simplification. DAG size of input: 1009 DAG size of output: 1006 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:25:11,462 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 20:25:11,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776415692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:25:11,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403898659] [2022-11-20 20:25:11,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:25:11,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:11,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:11,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:11,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:25:13,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:25:13,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:25:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 5346 conjuncts, 388 conjunts are in the unsatisfiable core [2022-11-20 20:25:13,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:48,183 WARN L233 SmtUtils]: Spent 6.34s 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 20:25:49,998 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 20:25:49,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:27:32,357 WARN L233 SmtUtils]: Spent 1.03m 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 20:28:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:28:13,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403898659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:28:13,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:28:13,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 23 [2022-11-20 20:28:13,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2671386] [2022-11-20 20:28:13,164 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:28:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 20:28:13,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:28:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 20:28:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=416, Unknown=15, NotChecked=0, Total=506 [2022-11-20 20:28:13,170 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 20:29:14,359 WARN L233 SmtUtils]: Spent 29.31s on a formula simplification that was a NOOP. DAG size: 1611 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:29:14,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:29:14,407 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-20 20:29:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:29:14,408 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 20:29:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:29:14,408 INFO L225 Difference]: With dead ends: 17 [2022-11-20 20:29:14,409 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 20:29:14,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 683.1s TimeCoverageRelationStatistics Valid=134, Invalid=663, Unknown=15, NotChecked=0, Total=812 [2022-11-20 20:29:14,410 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:29:14,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-11-20 20:29:14,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 20:29:14,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 20:29:14,425 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 20:29:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-20 20:29:14,426 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2022-11-20 20:29:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:29:14,426 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-20 20:29:14,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 20:29:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-20 20:29:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:29:14,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:29:14,428 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2022-11-20 20:29:14,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:29:14,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:29:14,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:29:15,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:29:15,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:29:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:29:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1580781475, now seen corresponding path program 3 times [2022-11-20 20:29:15,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:29:15,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103491215] [2022-11-20 20:29:15,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:29:15,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:29:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:29:15,039 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:29:15,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a01b83a7-a5c5-4b81-991f-548edd3082ec/bin/utaipan-6cKwYrpEi9/mathsat -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 20:29:19,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:29:19,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:29:19,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 7826 conjuncts, 832 conjunts are in the unsatisfiable core [2022-11-20 20:29:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:30:05,636 WARN L233 SmtUtils]: Spent 38.72s on a formula simplification. DAG size of input: 895 DAG size of output: 887 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:30:28,375 WARN L233 SmtUtils]: Spent 17.38s on a formula simplification that was a NOOP. DAG size: 915 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)