./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/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_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/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_19b6f6a2-de4a-43e9-9c7e-8b559f757978/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 03139a0dc9c9bdd7efc9938069c6081088e3e7b99e00d062696460247f5e0f82 --- 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 20:32:30,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:32:30,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:32:30,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:32:30,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:32:30,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:32:30,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:32:30,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:32:30,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:32:30,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:32:30,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:32:30,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:32:30,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:32:30,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:32:30,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:32:30,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:32:30,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:32:30,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:32:30,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:32:30,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:32:30,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:32:30,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:32:30,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:32:30,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:32:30,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:32:30,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:32:30,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:32:30,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:32:30,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:32:30,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:32:30,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:32:30,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:32:30,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:32:30,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:32:30,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:32:30,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:32:30,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:32:30,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:32:30,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:32:30,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:32:30,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:32:30,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 20:32:30,673 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:32:30,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:32:30,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:32:30,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:32:30,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:32:30,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:32:30,676 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:32:30,676 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:32:30,676 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:32:30,676 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:32:30,677 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:32:30,677 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:32:30,677 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:32:30,677 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:32:30,678 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:32:30,678 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:32:30,678 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:32:30,679 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:32:30,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:32:30,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:32:30,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:32:30,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:32:30,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:32:30,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:32:30,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:32:30,681 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:32:30,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:32:30,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:32:30,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:32:30,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:32:30,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:32:30,683 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:32:30,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:32:30,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:32:30,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:32:30,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:32:30,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:32:30,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:32:30,685 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_19b6f6a2-de4a-43e9-9c7e-8b559f757978/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03139a0dc9c9bdd7efc9938069c6081088e3e7b99e00d062696460247f5e0f82 [2022-11-20 20:32:30,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:32:30,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:32:30,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:32:30,966 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:32:30,967 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:32:30,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c [2022-11-20 20:32:34,069 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:32:34,502 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:32:34,503 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c [2022-11-20 20:32:34,528 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/data/8a46408d0/b297ffaed0474abb8c8bed03d45db695/FLAG5b78d761e [2022-11-20 20:32:34,551 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/data/8a46408d0/b297ffaed0474abb8c8bed03d45db695 [2022-11-20 20:32:34,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:32:34,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:32:34,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:32:34,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:32:34,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:32:34,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:32:34" (1/1) ... [2022-11-20 20:32:34,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be403bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:34, skipping insertion in model container [2022-11-20 20:32:34,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:32:34" (1/1) ... [2022-11-20 20:32:34,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:32:34,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:32:34,877 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_19b6f6a2-de4a-43e9-9c7e-8b559f757978/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c[1014,1027] [2022-11-20 20:32:35,092 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 20:32:35,098 INFO L158 Benchmark]: Toolchain (without parser) took 536.20ms. Allocated memory is still 151.0MB. Free memory was 101.1MB in the beginning and 75.3MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-20 20:32:35,098 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 151.0MB. Free memory is still 97.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:32:35,099 INFO L158 Benchmark]: CACSL2BoogieTranslator took 530.34ms. Allocated memory is still 151.0MB. Free memory was 101.1MB in the beginning and 75.3MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-20 20:32:35,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 151.0MB. Free memory is still 97.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 530.34ms. Allocated memory is still 151.0MB. Free memory was 101.1MB in the beginning and 75.3MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: NullPointerException: null: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:384) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/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_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/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_19b6f6a2-de4a-43e9-9c7e-8b559f757978/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 03139a0dc9c9bdd7efc9938069c6081088e3e7b99e00d062696460247f5e0f82 --- 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 20:32:37,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:32:37,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:32:37,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:32:37,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:32:37,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:32:37,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:32:37,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:32:37,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:32:37,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:32:37,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:32:37,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:32:37,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:32:37,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:32:37,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:32:37,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:32:37,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:32:37,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:32:37,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:32:37,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:32:37,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:32:37,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:32:37,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:32:37,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:32:37,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:32:37,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:32:37,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:32:37,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:32:37,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:32:37,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:32:37,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:32:37,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:32:37,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:32:37,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:32:37,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:32:37,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:32:37,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:32:37,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:32:37,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:32:37,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:32:37,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:32:37,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-20 20:32:37,441 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:32:37,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:32:37,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:32:37,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:32:37,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:32:37,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:32:37,445 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:32:37,445 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:32:37,445 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:32:37,445 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:32:37,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:32:37,447 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:32:37,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:32:37,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:32:37,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:32:37,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:32:37,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:32:37,449 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:32:37,449 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:32:37,449 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:32:37,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:32:37,449 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:32:37,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:32:37,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:32:37,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:32:37,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:32:37,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:32:37,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:32:37,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:32:37,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:32:37,451 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:32:37,451 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:32:37,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:32:37,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:32:37,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:32:37,452 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_19b6f6a2-de4a-43e9-9c7e-8b559f757978/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03139a0dc9c9bdd7efc9938069c6081088e3e7b99e00d062696460247f5e0f82 [2022-11-20 20:32:37,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:32:37,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:32:37,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:32:37,903 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:32:37,904 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:32:37,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c [2022-11-20 20:32:40,940 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:32:41,399 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:32:41,400 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c [2022-11-20 20:32:41,434 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/data/827a64562/ae48591bc7044c81912b58b5ca86fccd/FLAGa9b0921c7 [2022-11-20 20:32:41,456 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/data/827a64562/ae48591bc7044c81912b58b5ca86fccd [2022-11-20 20:32:41,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:32:41,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:32:41,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:32:41,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:32:41,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:32:41,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:32:41" (1/1) ... [2022-11-20 20:32:41,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35bf7ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:41, skipping insertion in model container [2022-11-20 20:32:41,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:32:41" (1/1) ... [2022-11-20 20:32:41,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:32:41,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:32:41,779 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_19b6f6a2-de4a-43e9-9c7e-8b559f757978/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c[1014,1027] [2022-11-20 20:32:42,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:32:42,352 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:32:42,364 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.gear.2.prop3-func-interl.c[1014,1027] [2022-11-20 20:32:42,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:32:42,642 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:32:42,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42 WrapperNode [2022-11-20 20:32:42,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:32:42,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:32:42,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:32:42,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:32:42,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:42,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:42,824 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3529 [2022-11-20 20:32:42,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:32:42,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:32:42,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:32:42,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:32:42,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:42,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:42,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:42,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:42,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:42,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:43,003 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:43,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:43,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:32:43,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:32:43,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:32:43,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:32:43,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (1/1) ... [2022-11-20 20:32:43,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:32:43,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:32:43,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:32:43,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:32:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:32:43,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:32:43,859 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:32:43,861 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:32:51,596 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:32:51,604 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:32:51,604 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:32:51,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:32:51 BoogieIcfgContainer [2022-11-20 20:32:51,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:32:51,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:32:51,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:32:51,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:32:51,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:32:41" (1/3) ... [2022-11-20 20:32:51,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341cb521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:32:51, skipping insertion in model container [2022-11-20 20:32:51,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:32:42" (2/3) ... [2022-11-20 20:32:51,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341cb521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:32:51, skipping insertion in model container [2022-11-20 20:32:51,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:32:51" (3/3) ... [2022-11-20 20:32:51,620 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.gear.2.prop3-func-interl.c [2022-11-20 20:32:51,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:32:51,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:32:51,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:32:51,720 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;@56ad1752, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:32:51,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:32:51,725 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 20:32:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:32:51,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:32:51,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:32:51,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:32:51,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:32:51,747 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-20 20:32:51,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:32:51,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428549227] [2022-11-20 20:32:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:32:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:32:51,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:32:51,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:32:51,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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 20:32:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:32:52,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:32:52,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:32:52,739 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 20:32:52,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:32:52,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:32:52,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428549227] [2022-11-20 20:32:52,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428549227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:32:52,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:32:52,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:32:52,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929002719] [2022-11-20 20:32:52,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:32:52,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:32:52,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:32:52,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:32:52,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:32:52,787 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 20:32:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:32:53,834 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-20 20:32:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:32:53,837 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 20:32:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:32:53,850 INFO L225 Difference]: With dead ends: 20 [2022-11-20 20:32:53,850 INFO L226 Difference]: Without dead ends: 11 [2022-11-20 20:32:53,853 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 20:32:53,858 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:32:53,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:32:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-20 20:32:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-20 20:32:53,894 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 20:32:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-20 20:32:53,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-20 20:32:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:32:53,897 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-20 20:32:53,898 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 20:32:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-20 20:32:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:32:53,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:32:53,899 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:32:53,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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 20:32:54,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:32:54,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:32:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:32:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-20 20:32:54,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:32:54,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903740938] [2022-11-20 20:32:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:32:54,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:32:54,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:32:54,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:32:54,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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 20:32:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:32:55,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-20 20:32:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:32:56,905 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 20:32:56,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:32:57,735 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 20:32:57,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:32:57,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903740938] [2022-11-20 20:32:57,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903740938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:32:57,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [536988019] [2022-11-20 20:32:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:32:57,737 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:32:57,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:32:57,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:32:57,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-20 20:33:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:33:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-20 20:33:00,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:33:01,097 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 20:33:01,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:33:01,722 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 20:33:01,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [536988019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:33:01,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008853780] [2022-11-20 20:33:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:33:01,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:33:01,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:33:01,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:33:01,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:33:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:33:03,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-20 20:33:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:33:03,742 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 20:33:03,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:33:04,814 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 20:33:04,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008853780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:33:04,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:33:04,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 10 [2022-11-20 20:33:04,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063367817] [2022-11-20 20:33:04,816 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:33:04,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:33:04,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:33:04,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:33:04,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:33:04,819 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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 20:33:07,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:33:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:33:07,611 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-11-20 20:33:07,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:33:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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 20:33:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:33:07,612 INFO L225 Difference]: With dead ends: 16 [2022-11-20 20:33:07,612 INFO L226 Difference]: Without dead ends: 14 [2022-11-20 20:33:07,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:33:07,614 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:33:07,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 11 Unchecked, 2.5s Time] [2022-11-20 20:33:07,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-20 20:33:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-20 20:33:07,619 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 20:33:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-20 20:33:07,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-20 20:33:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:33:07,621 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-20 20:33:07,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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 20:33:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-20 20:33:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:33:07,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:33:07,622 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 20:33:07,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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 20:33:07,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:33:08,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:33:08,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:33:08,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:33:08,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:33:08,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-20 20:33:08,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:33:08,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153083187] [2022-11-20 20:33:08,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:33:08,243 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 20:33:08,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:33:08,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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 20:33:08,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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 20:33:10,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:33:10,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:33:10,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 6015 conjuncts, 234 conjunts are in the unsatisfiable core [2022-11-20 20:33:10,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:33:22,573 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 20:33:22,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:33:39,262 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 20:33:39,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:33:39,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153083187] [2022-11-20 20:33:39,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153083187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:33:39,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [503937943] [2022-11-20 20:33:39,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:33:39,264 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:33:39,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:33:39,265 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:33:39,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-20 20:33:43,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:33:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:33:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 6015 conjuncts, 299 conjunts are in the unsatisfiable core [2022-11-20 20:33:44,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:34:01,002 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 20:34:01,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:34:21,090 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 20:34:21,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [503937943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:34:21,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488647593] [2022-11-20 20:34:21,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:34:21,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:34:21,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:34:21,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:34:21,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:34:23,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:34:23,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:34:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 6015 conjuncts, 143 conjunts are in the unsatisfiable core [2022-11-20 20:34:23,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:34:27,057 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 20:34:27,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:34:32,838 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 20:34:32,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488647593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:34:32,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:34:32,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6, 6, 7, 7] total 24 [2022-11-20 20:34:32,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011279221] [2022-11-20 20:34:32,839 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:34:32,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:34:32,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:34:32,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:34:32,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=452, Unknown=12, NotChecked=0, Total=552 [2022-11-20 20:34:32,842 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 20:35:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:35:00,272 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-11-20 20:35:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:35:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 20:35:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:35:00,274 INFO L225 Difference]: With dead ends: 17 [2022-11-20 20:35:00,274 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 20:35:00,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 92.2s TimeCoverageRelationStatistics Valid=153, Invalid=644, Unknown=15, NotChecked=0, Total=812 [2022-11-20 20:35:00,276 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:35:00,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-11-20 20:35:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 20:35:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 20:35:00,285 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 20:35:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-20 20:35:00,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2022-11-20 20:35:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:35:00,286 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-20 20:35:00,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 20:35:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-20 20:35:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:35:00,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:35:00,287 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2022-11-20 20:35:00,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:35:00,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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 20:35:00,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:35:00,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:35:00,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:35:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:35:00,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1580781475, now seen corresponding path program 3 times [2022-11-20 20:35:00,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:35:00,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709253744] [2022-11-20 20:35:00,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:35:00,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:35:00,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:35:00,897 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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 20:35:00,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/mathsat -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 20:35:04,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:35:04,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:35:04,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 8914 conjuncts, 457 conjunts are in the unsatisfiable core [2022-11-20 20:35:04,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:35:44,548 WARN L233 SmtUtils]: Spent 34.03s on a formula simplification that was a NOOP. DAG size: 504 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:36:21,420 WARN L233 SmtUtils]: Spent 32.64s on a formula simplification that was a NOOP. DAG size: 526 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:37:21,206 WARN L233 SmtUtils]: Spent 55.41s on a formula simplification. DAG size of input: 518 DAG size of output: 517 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:37:58,456 WARN L233 SmtUtils]: Spent 17.71s on a formula simplification that was a NOOP. DAG size: 2129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:38:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:01,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:38,670 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 743 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:40:22,241 WARN L233 SmtUtils]: Spent 1.24m on a formula simplification. DAG size of input: 988 DAG size of output: 976 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:41:30,295 WARN L233 SmtUtils]: Spent 37.86s on a formula simplification that was a NOOP. DAG size: 1269 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:41:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:32,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:41:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709253744] [2022-11-20 20:41:32,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709253744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [768025872] [2022-11-20 20:41:32,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:41:32,964 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:41:32,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:41:32,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:41:32,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19b6f6a2-de4a-43e9-9c7e-8b559f757978/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-20 20:41:40,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:41:40,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:41:40,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 8914 conjuncts, 458 conjunts are in the unsatisfiable core [2022-11-20 20:41:40,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:32,940 WARN L233 SmtUtils]: Spent 32.61s on a formula simplification that was a NOOP. DAG size: 504 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:43:23,597 WARN L233 SmtUtils]: Spent 35.35s on a formula simplification that was a NOOP. DAG size: 526 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:44:32,793 WARN L233 SmtUtils]: Spent 53.30s on a formula simplification. DAG size of input: 518 DAG size of output: 517 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:45:30,803 WARN L233 SmtUtils]: Spent 16.60s on a formula simplification that was a NOOP. DAG size: 2121 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:45:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:32,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:46:26,826 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 743 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)