./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V --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 32bit --witnessprinter.graph.data.programhash 1ab6b58208d0c243ef581620bcab9aae54e201e00d3505f3320b182de5e7ff75 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:40:32,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:40:32,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:40:32,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:40:32,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:40:32,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:40:32,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:40:32,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:40:32,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:40:32,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:40:32,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:40:32,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:40:32,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:40:32,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:40:32,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:40:32,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:40:32,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:40:32,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:40:32,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:40:32,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:40:32,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:40:32,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:40:32,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:40:32,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:40:32,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:40:32,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:40:32,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:40:32,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:40:32,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:40:32,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:40:32,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:40:32,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:40:32,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:40:32,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:40:32,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:40:32,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:40:32,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:40:32,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:40:32,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:40:32,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:40:32,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:40:32,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:40:32,856 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:40:32,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:40:32,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:40:32,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:40:32,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:40:32,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:40:32,865 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:40:32,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:40:32,865 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:40:32,865 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:40:32,866 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:40:32,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:40:32,867 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:40:32,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:40:32,867 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:40:32,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:40:32,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:40:32,868 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:40:32,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:40:32,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:40:32,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:40:32,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:40:32,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:40:32,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:40:32,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:40:32,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:40:32,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:40:32,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:40:32,872 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:40:32,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:40:32,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:40:32,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:40:32,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:40:32,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:40:32,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:40:32,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:40:32,874 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:40:32,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:40:32,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:40:32,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:40:32,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:40:32,875 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ab6b58208d0c243ef581620bcab9aae54e201e00d3505f3320b182de5e7ff75 [2021-11-23 02:40:33,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:40:33,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:40:33,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:40:33,170 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:40:33,171 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:40:33,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2021-11-23 02:40:33,250 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/data/d40f1014b/d7271d42531744c6b448ae1de3cb25c2/FLAG039d85169 [2021-11-23 02:40:33,734 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:40:33,735 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2021-11-23 02:40:33,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/data/d40f1014b/d7271d42531744c6b448ae1de3cb25c2/FLAG039d85169 [2021-11-23 02:40:34,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/data/d40f1014b/d7271d42531744c6b448ae1de3cb25c2 [2021-11-23 02:40:34,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:40:34,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:40:34,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:40:34,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:40:34,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:40:34,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f7ce32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34, skipping insertion in model container [2021-11-23 02:40:34,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:40:34,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:40:34,391 WARN L230 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_5f714d73-d232-4ae8-8595-5e8295a57945/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2021-11-23 02:40:34,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:40:34,415 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:40:34,428 WARN L230 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_5f714d73-d232-4ae8-8595-5e8295a57945/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2021-11-23 02:40:34,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:40:34,448 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:40:34,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34 WrapperNode [2021-11-23 02:40:34,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:40:34,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:40:34,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:40:34,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:40:34,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,483 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2021-11-23 02:40:34,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:40:34,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:40:34,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:40:34,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:40:34,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:40:34,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:40:34,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:40:34,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:40:34,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (1/1) ... [2021-11-23 02:40:34,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:40:34,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:34,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:40:34,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:40:34,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:40:34,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:40:34,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:40:34,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:40:34,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:40:34,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:40:34,666 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:40:34,668 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:40:34,836 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:40:34,859 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:40:34,859 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:40:34,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:34 BoogieIcfgContainer [2021-11-23 02:40:34,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:40:34,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:40:34,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:40:34,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:40:34,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:40:34" (1/3) ... [2021-11-23 02:40:34,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cd612d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:34, skipping insertion in model container [2021-11-23 02:40:34,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:34" (2/3) ... [2021-11-23 02:40:34,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cd612d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:34, skipping insertion in model container [2021-11-23 02:40:34,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:34" (3/3) ... [2021-11-23 02:40:34,871 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound2.c [2021-11-23 02:40:34,876 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:40:34,876 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:40:34,937 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:40:34,958 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:40:34,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:40:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:40:34,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:40:34,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:34,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:34,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:34,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:34,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2021-11-23 02:40:35,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:35,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906419493] [2021-11-23 02:40:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:35,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:35,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:35,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906419493] [2021-11-23 02:40:35,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906419493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:35,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:35,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:40:35,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690596085] [2021-11-23 02:40:35,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:35,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:40:35,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:40:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:40:35,237 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:35,271 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2021-11-23 02:40:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:40:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:40:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:35,281 INFO L225 Difference]: With dead ends: 43 [2021-11-23 02:40:35,282 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 02:40:35,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:40:35,289 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:35,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:40:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 02:40:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 02:40:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:40:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2021-11-23 02:40:35,330 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2021-11-23 02:40:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:35,331 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2021-11-23 02:40:35,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2021-11-23 02:40:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:40:35,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:35,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:35,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:40:35,333 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2021-11-23 02:40:35,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:35,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912536186] [2021-11-23 02:40:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:35,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:35,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:35,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912536186] [2021-11-23 02:40:35,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912536186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:35,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:35,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:40:35,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927322303] [2021-11-23 02:40:35,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:35,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:35,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:35,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:35,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:35,420 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:35,472 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2021-11-23 02:40:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:40:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:40:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:35,474 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:40:35,475 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 02:40:35,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:40:35,477 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:35,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:40:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 02:40:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-11-23 02:40:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:40:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-11-23 02:40:35,489 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 7 [2021-11-23 02:40:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:35,489 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-11-23 02:40:35,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-11-23 02:40:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:40:35,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:35,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:35,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:40:35,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:35,493 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2021-11-23 02:40:35,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:35,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468547921] [2021-11-23 02:40:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:35,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:35,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:35,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468547921] [2021-11-23 02:40:35,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468547921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:35,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:35,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:40:35,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893108735] [2021-11-23 02:40:35,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:35,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:40:35,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:35,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:40:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:40:35,531 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:35,554 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-11-23 02:40:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:40:35,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:40:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:35,556 INFO L225 Difference]: With dead ends: 39 [2021-11-23 02:40:35,556 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 02:40:35,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:40:35,559 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:35,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:40:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 02:40:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 02:40:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:40:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-23 02:40:35,574 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 9 [2021-11-23 02:40:35,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:35,575 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-23 02:40:35,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-23 02:40:35,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:40:35,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:35,577 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:35,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:40:35,579 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2021-11-23 02:40:35,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:35,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27562582] [2021-11-23 02:40:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:35,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:40:35,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:35,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27562582] [2021-11-23 02:40:35,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27562582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:35,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:35,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:40:35,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414603959] [2021-11-23 02:40:35,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:35,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:35,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:35,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:35,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:35,661 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:40:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:35,711 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-11-23 02:40:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:40:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-23 02:40:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:35,713 INFO L225 Difference]: With dead ends: 39 [2021-11-23 02:40:35,714 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 02:40:35,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:40:35,716 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:35,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:40:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 02:40:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-11-23 02:40:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:40:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-23 02:40:35,726 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2021-11-23 02:40:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:35,727 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-23 02:40:35,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:40:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-23 02:40:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:40:35,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:35,728 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:35,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:40:35,729 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:35,730 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2021-11-23 02:40:35,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:35,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349282560] [2021-11-23 02:40:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:35,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:35,744 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:35,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207870089] [2021-11-23 02:40:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:35,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:35,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:35,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:35,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:40:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:35,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:40:35,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:40:36,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:40:36,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:36,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349282560] [2021-11-23 02:40:36,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:36,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207870089] [2021-11-23 02:40:36,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207870089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:36,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:36,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:40:36,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185969216] [2021-11-23 02:40:36,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:36,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:36,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:36,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:36,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:36,082 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:40:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:36,179 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2021-11-23 02:40:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:40:36,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-23 02:40:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:36,184 INFO L225 Difference]: With dead ends: 58 [2021-11-23 02:40:36,189 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 02:40:36,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:40:36,193 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:36,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 99 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:40:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 02:40:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-23 02:40:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 02:40:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2021-11-23 02:40:36,220 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 17 [2021-11-23 02:40:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:36,221 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2021-11-23 02:40:36,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:40:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2021-11-23 02:40:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:40:36,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:36,223 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:36,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:36,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:36,437 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2021-11-23 02:40:36,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:36,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071563332] [2021-11-23 02:40:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:36,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:36,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:36,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447487967] [2021-11-23 02:40:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:36,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:36,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:36,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:40:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:36,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:40:36,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:40:36,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:40:36,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:36,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071563332] [2021-11-23 02:40:36,689 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:36,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447487967] [2021-11-23 02:40:36,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447487967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:36,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:36,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:40:36,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302101291] [2021-11-23 02:40:36,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:36,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:36,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:36,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:36,693 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:40:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:36,762 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-11-23 02:40:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:40:36,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-11-23 02:40:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:36,767 INFO L225 Difference]: With dead ends: 57 [2021-11-23 02:40:36,768 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 02:40:36,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:40:36,772 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:36,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:40:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 02:40:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-11-23 02:40:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 02:40:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-11-23 02:40:36,792 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 25 [2021-11-23 02:40:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:36,793 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-11-23 02:40:36,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:40:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-11-23 02:40:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:40:36,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:36,795 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:36,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:37,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:40:37,021 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:37,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash 292094342, now seen corresponding path program 1 times [2021-11-23 02:40:37,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:37,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653642702] [2021-11-23 02:40:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:37,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:37,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:37,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038985792] [2021-11-23 02:40:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:37,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:37,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:37,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:37,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:40:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:40:37,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:40:37,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:40:37,289 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653642702] [2021-11-23 02:40:37,290 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038985792] [2021-11-23 02:40:37,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038985792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:40:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491118883] [2021-11-23 02:40:37,312 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 02:40:37,312 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:40:37,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:40:37,324 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:40:37,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:40:41,319 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2021-11-23 02:40:41,349 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:40:42,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1027#(and (<= ~counter~0 3) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:40:42,270 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:40:42,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:40:42,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-11-23 02:40:42,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531973709] [2021-11-23 02:40:42,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:40:42,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:42,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:40:42,272 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:40:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:42,329 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2021-11-23 02:40:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:40:42,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 32 [2021-11-23 02:40:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:42,334 INFO L225 Difference]: With dead ends: 81 [2021-11-23 02:40:42,334 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 02:40:42,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:40:42,338 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:42,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:40:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 02:40:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-23 02:40:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 02:40:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-11-23 02:40:42,361 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 32 [2021-11-23 02:40:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:42,363 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-11-23 02:40:42,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:40:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-11-23 02:40:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:40:42,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:42,365 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 02:40:42,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:42,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:40:42,579 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 747162997, now seen corresponding path program 1 times [2021-11-23 02:40:42,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:42,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625373433] [2021-11-23 02:40:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:42,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:42,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:42,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519706914] [2021-11-23 02:40:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:42,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:42,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:42,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:42,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:40:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:40:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:40:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:40:42,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:40:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:40:42,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:42,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625373433] [2021-11-23 02:40:42,866 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:40:42,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519706914] [2021-11-23 02:40:42,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519706914] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:40:42,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:40:42,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-23 02:40:42,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115659856] [2021-11-23 02:40:42,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:42,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:42,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:40:42,869 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:40:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:43,260 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-11-23 02:40:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:40:43,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-11-23 02:40:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:43,261 INFO L225 Difference]: With dead ends: 65 [2021-11-23 02:40:43,262 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 02:40:43,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:40:43,263 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:43,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:40:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 02:40:43,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-23 02:40:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 02:40:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-23 02:40:43,271 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 35 [2021-11-23 02:40:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:43,271 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-23 02:40:43,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:40:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-23 02:40:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:40:43,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:43,274 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:43,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 02:40:43,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:43,489 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1125945480, now seen corresponding path program 1 times [2021-11-23 02:40:43,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:43,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135943420] [2021-11-23 02:40:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:43,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:43,498 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:40:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310829437] [2021-11-23 02:40:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:43,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:43,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:43,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:40:43,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:40:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:40:43,575 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:40:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:40:43,634 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:40:43,635 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:40:43,636 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:40:43,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:40:43,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:40:43,852 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:43,855 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:40:43,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:40:43 BoogieIcfgContainer [2021-11-23 02:40:43,889 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:40:43,890 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:40:43,890 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:40:43,890 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:40:43,891 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:34" (3/4) ... [2021-11-23 02:40:43,893 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 02:40:43,946 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:40:43,946 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:40:43,947 INFO L158 Benchmark]: Toolchain (without parser) took 9834.09ms. Allocated memory was 86.0MB in the beginning and 195.0MB in the end (delta: 109.1MB). Free memory was 48.8MB in the beginning and 94.1MB in the end (delta: -45.4MB). Peak memory consumption was 63.8MB. Max. memory is 16.1GB. [2021-11-23 02:40:43,948 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 86.0MB. Free memory was 65.4MB in the beginning and 65.3MB in the end (delta: 39.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:40:43,948 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.16ms. Allocated memory was 86.0MB in the beginning and 111.1MB in the end (delta: 25.2MB). Free memory was 48.6MB in the beginning and 85.9MB in the end (delta: -37.3MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-11-23 02:40:43,948 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.12ms. Allocated memory is still 111.1MB. Free memory was 85.9MB in the beginning and 84.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:40:43,949 INFO L158 Benchmark]: Boogie Preprocessor took 35.19ms. Allocated memory is still 111.1MB. Free memory was 84.5MB in the beginning and 83.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:40:43,949 INFO L158 Benchmark]: RCFGBuilder took 341.46ms. Allocated memory is still 111.1MB. Free memory was 83.4MB in the beginning and 72.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:40:43,950 INFO L158 Benchmark]: TraceAbstraction took 9025.80ms. Allocated memory was 111.1MB in the beginning and 195.0MB in the end (delta: 83.9MB). Free memory was 72.4MB in the beginning and 97.3MB in the end (delta: -24.9MB). Peak memory consumption was 60.2MB. Max. memory is 16.1GB. [2021-11-23 02:40:43,950 INFO L158 Benchmark]: Witness Printer took 56.70ms. Allocated memory is still 195.0MB. Free memory was 97.3MB in the beginning and 94.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:40:43,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 86.0MB. Free memory was 65.4MB in the beginning and 65.3MB in the end (delta: 39.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.16ms. Allocated memory was 86.0MB in the beginning and 111.1MB in the end (delta: 25.2MB). Free memory was 48.6MB in the beginning and 85.9MB in the end (delta: -37.3MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.12ms. Allocated memory is still 111.1MB. Free memory was 85.9MB in the beginning and 84.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.19ms. Allocated memory is still 111.1MB. Free memory was 84.5MB in the beginning and 83.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 341.46ms. Allocated memory is still 111.1MB. Free memory was 83.4MB in the beginning and 72.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9025.80ms. Allocated memory was 111.1MB in the beginning and 195.0MB in the end (delta: 83.9MB). Free memory was 72.4MB in the beginning and 97.3MB in the end (delta: -24.9MB). Peak memory consumption was 60.2MB. Max. memory is 16.1GB. * Witness Printer took 56.70ms. Allocated memory is still 195.0MB. Free memory was 97.3MB in the beginning and 94.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=1, B=1, counter=0, d=1, p=1, q=0, r=1] [L34] EXPR counter++ VAL [A=1, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=1, B=1, counter=1, d=2, p=2, q=0, r=1] [L34] EXPR counter++ VAL [A=1, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L38] COND TRUE !(r >= d) VAL [A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L44] EXPR counter++ VAL [A=1, B=1, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L44] COND FALSE !(counter++<2) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L58] RET __VERIFIER_assert(A == d*q + r) VAL [A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L59] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.9s, OverallIterations: 9, TraceHistogramMax: 8, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 75 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 640 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 444 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 206 IncrementalHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 213 mSDtfsCounter, 206 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 177 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=8, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 555 SizeOfPredicates, 4 NumberOfNonLiveVariables, 369 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 197/206 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 02:40:43,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f714d73-d232-4ae8-8595-5e8295a57945/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE