./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.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_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/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_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/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_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/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 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:58:53,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:58:53,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:58:53,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:58:53,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:58:53,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:58:53,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:58:53,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:58:53,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:58:53,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:58:53,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:58:53,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:58:53,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:58:53,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:58:53,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:58:53,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:58:53,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:58:53,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:58:53,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:58:53,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:58:53,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:58:53,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:58:53,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:58:53,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:58:53,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:58:53,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:58:53,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:58:53,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:58:53,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:58:53,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:58:53,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:58:53,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:58:53,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:58:53,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:58:53,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:58:53,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:58:53,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:58:53,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:58:53,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:58:53,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:58:53,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:58:53,671 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:58:53,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:58:53,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:58:53,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:58:53,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:58:53,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:58:53,718 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:58:53,719 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:58:53,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:58:53,719 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:58:53,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:58:53,719 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:58:53,720 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:58:53,720 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:58:53,720 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:58:53,720 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:58:53,721 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:58:53,721 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:58:53,721 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:58:53,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:58:53,722 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:58:53,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:58:53,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:58:53,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:58:53,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:58:53,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:58:53,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:58:53,723 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:58:53,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:58:53,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:58:53,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:58:53,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:58:53,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:58:53,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:58:53,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:58:53,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:58:53,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:58:53,733 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:58:53,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:58:53,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:58:53,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:58:53,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:58:53,734 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_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 [2021-11-23 01:58:54,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:58:54,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:58:54,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:58:54,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:58:54,107 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:58:54,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2021-11-23 01:58:54,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/data/9d0e9eb89/0241047f992949b2b3c8017dd857385e/FLAGcf2224339 [2021-11-23 01:58:54,810 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:58:54,811 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2021-11-23 01:58:54,824 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/data/9d0e9eb89/0241047f992949b2b3c8017dd857385e/FLAGcf2224339 [2021-11-23 01:58:55,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/data/9d0e9eb89/0241047f992949b2b3c8017dd857385e [2021-11-23 01:58:55,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:58:55,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:58:55,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:58:55,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:58:55,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:58:55,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254cfe60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55, skipping insertion in model container [2021-11-23 01:58:55,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:58:55,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:58:55,363 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_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2021-11-23 01:58:55,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:58:55,482 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:58:55,494 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_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2021-11-23 01:58:55,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:58:55,590 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:58:55,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55 WrapperNode [2021-11-23 01:58:55,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:58:55,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:58:55,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:58:55,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:58:55,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,685 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 861 [2021-11-23 01:58:55,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:58:55,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:58:55,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:58:55,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:58:55,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:58:55,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:58:55,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:58:55,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:58:55,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (1/1) ... [2021-11-23 01:58:55,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:58:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:58:55,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:58:55,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:58:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:58:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:58:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-23 01:58:55,852 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-23 01:58:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:58:55,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:58:55,937 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:58:55,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:58:56,707 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:58:56,836 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:58:56,836 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-23 01:58:56,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:58:56 BoogieIcfgContainer [2021-11-23 01:58:56,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:58:56,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:58:56,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:58:56,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:58:56,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:58:55" (1/3) ... [2021-11-23 01:58:56,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec8943c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:58:56, skipping insertion in model container [2021-11-23 01:58:56,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:58:55" (2/3) ... [2021-11-23 01:58:56,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec8943c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:58:56, skipping insertion in model container [2021-11-23 01:58:56,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:58:56" (3/3) ... [2021-11-23 01:58:56,849 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2021-11-23 01:58:56,854 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:58:56,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:58:56,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:58:56,914 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 01:58:56,914 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:58:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 223 states have (on average 1.7847533632286996) internal successors, (398), 229 states have internal predecessors, (398), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 01:58:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 01:58:56,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:56,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:56,974 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash -948503043, now seen corresponding path program 1 times [2021-11-23 01:58:56,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:56,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442543761] [2021-11-23 01:58:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:56,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:57,185 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 01:58:57,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442543761] [2021-11-23 01:58:57,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442543761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:57,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:57,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:58:57,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975214802] [2021-11-23 01:58:57,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:57,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:57,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:57,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:57,237 INFO L87 Difference]: Start difference. First operand has 231 states, 223 states have (on average 1.7847533632286996) internal successors, (398), 229 states have internal predecessors, (398), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 01:58:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:57,761 INFO L93 Difference]: Finished difference Result 624 states and 1094 transitions. [2021-11-23 01:58:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:57,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 24 [2021-11-23 01:58:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:57,793 INFO L225 Difference]: With dead ends: 624 [2021-11-23 01:58:57,793 INFO L226 Difference]: Without dead ends: 391 [2021-11-23 01:58:57,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:57,804 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 226 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:57,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 558 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:58:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-23 01:58:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 384. [2021-11-23 01:58:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.5343915343915344) internal successors, (580), 382 states have internal predecessors, (580), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:58:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 585 transitions. [2021-11-23 01:58:57,923 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 585 transitions. Word has length 24 [2021-11-23 01:58:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:57,924 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 585 transitions. [2021-11-23 01:58:57,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 01:58:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 585 transitions. [2021-11-23 01:58:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 01:58:57,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:57,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:57,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:58:57,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1965554767, now seen corresponding path program 1 times [2021-11-23 01:58:57,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:57,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266949883] [2021-11-23 01:58:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:57,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:58,047 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 01:58:58,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:58,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266949883] [2021-11-23 01:58:58,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266949883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:58,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:58,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:58:58,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029567915] [2021-11-23 01:58:58,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:58,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:58,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:58,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:58,053 INFO L87 Difference]: Start difference. First operand 384 states and 585 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 01:58:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:58,272 INFO L93 Difference]: Finished difference Result 997 states and 1548 transitions. [2021-11-23 01:58:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:58,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 36 [2021-11-23 01:58:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:58,278 INFO L225 Difference]: With dead ends: 997 [2021-11-23 01:58:58,278 INFO L226 Difference]: Without dead ends: 623 [2021-11-23 01:58:58,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:58,281 INFO L933 BasicCegarLoop]: 472 mSDtfsCounter, 271 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:58,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 741 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:58:58,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-11-23 01:58:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 616. [2021-11-23 01:58:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 610 states have (on average 1.5721311475409836) internal successors, (959), 614 states have internal predecessors, (959), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:58:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 964 transitions. [2021-11-23 01:58:58,311 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 964 transitions. Word has length 36 [2021-11-23 01:58:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:58,311 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 964 transitions. [2021-11-23 01:58:58,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 01:58:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 964 transitions. [2021-11-23 01:58:58,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 01:58:58,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:58,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:58,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:58:58,314 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1162048500, now seen corresponding path program 1 times [2021-11-23 01:58:58,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:58,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182275860] [2021-11-23 01:58:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:58,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:58,368 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 01:58:58,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:58,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182275860] [2021-11-23 01:58:58,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182275860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:58,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:58,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:58:58,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522277267] [2021-11-23 01:58:58,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:58,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:58,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:58,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:58,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:58,372 INFO L87 Difference]: Start difference. First operand 616 states and 964 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 01:58:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:58,546 INFO L93 Difference]: Finished difference Result 1564 states and 2449 transitions. [2021-11-23 01:58:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 37 [2021-11-23 01:58:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:58,553 INFO L225 Difference]: With dead ends: 1564 [2021-11-23 01:58:58,553 INFO L226 Difference]: Without dead ends: 958 [2021-11-23 01:58:58,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:58,556 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 293 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:58,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 597 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:58,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-23 01:58:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 947. [2021-11-23 01:58:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 941 states have (on average 1.5642933049946866) internal successors, (1472), 945 states have internal predecessors, (1472), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:58:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1477 transitions. [2021-11-23 01:58:58,597 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1477 transitions. Word has length 37 [2021-11-23 01:58:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:58,598 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 1477 transitions. [2021-11-23 01:58:58,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 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 01:58:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1477 transitions. [2021-11-23 01:58:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 01:58:58,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:58,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:58,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:58:58,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:58,602 INFO L85 PathProgramCache]: Analyzing trace with hash 641152374, now seen corresponding path program 1 times [2021-11-23 01:58:58,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:58,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684577594] [2021-11-23 01:58:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:58,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:58:58,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684577594] [2021-11-23 01:58:58,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684577594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:58,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:58,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:58:58,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394492257] [2021-11-23 01:58:58,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:58,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:58,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:58,673 INFO L87 Difference]: Start difference. First operand 947 states and 1477 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 01:58:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:58,860 INFO L93 Difference]: Finished difference Result 2544 states and 3981 transitions. [2021-11-23 01:58:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 41 [2021-11-23 01:58:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:58,871 INFO L225 Difference]: With dead ends: 2544 [2021-11-23 01:58:58,872 INFO L226 Difference]: Without dead ends: 1607 [2021-11-23 01:58:58,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:58,875 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 343 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:58,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 777 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-11-23 01:58:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1505. [2021-11-23 01:58:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1499 states have (on average 1.5557038025350234) internal successors, (2332), 1503 states have internal predecessors, (2332), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:58:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2337 transitions. [2021-11-23 01:58:58,963 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2337 transitions. Word has length 41 [2021-11-23 01:58:58,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:58,963 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 2337 transitions. [2021-11-23 01:58:58,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 01:58:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2337 transitions. [2021-11-23 01:58:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 01:58:58,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:58,965 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:58,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:58:58,966 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash -652123043, now seen corresponding path program 1 times [2021-11-23 01:58:58,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:58,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342975036] [2021-11-23 01:58:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:58,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:59,011 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 01:58:59,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:59,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342975036] [2021-11-23 01:58:59,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342975036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:59,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:59,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:58:59,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473232029] [2021-11-23 01:58:59,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:59,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:59,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:59,015 INFO L87 Difference]: Start difference. First operand 1505 states and 2337 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 01:58:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:59,280 INFO L93 Difference]: Finished difference Result 4290 states and 6652 transitions. [2021-11-23 01:58:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:59,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 48 [2021-11-23 01:58:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:59,299 INFO L225 Difference]: With dead ends: 4290 [2021-11-23 01:58:59,299 INFO L226 Difference]: Without dead ends: 2793 [2021-11-23 01:58:59,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:59,306 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 315 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:59,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 615 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2021-11-23 01:58:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2740. [2021-11-23 01:58:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2734 states have (on average 1.5303584491587419) internal successors, (4184), 2738 states have internal predecessors, (4184), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:58:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 4189 transitions. [2021-11-23 01:58:59,451 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 4189 transitions. Word has length 48 [2021-11-23 01:58:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:58:59,451 INFO L470 AbstractCegarLoop]: Abstraction has 2740 states and 4189 transitions. [2021-11-23 01:58:59,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 01:58:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 4189 transitions. [2021-11-23 01:58:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 01:58:59,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:58:59,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:58:59,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 01:58:59,454 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:58:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:58:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2093269485, now seen corresponding path program 1 times [2021-11-23 01:58:59,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:58:59,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534067028] [2021-11-23 01:58:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:58:59,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:58:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:58:59,497 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 01:58:59,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:58:59,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534067028] [2021-11-23 01:58:59,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534067028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:58:59,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:58:59,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:58:59,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8371151] [2021-11-23 01:58:59,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:58:59,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:58:59,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:58:59,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:58:59,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:59,502 INFO L87 Difference]: Start difference. First operand 2740 states and 4189 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 01:58:59,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:58:59,779 INFO L93 Difference]: Finished difference Result 6433 states and 9806 transitions. [2021-11-23 01:58:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:58:59,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 48 [2021-11-23 01:58:59,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:58:59,802 INFO L225 Difference]: With dead ends: 6433 [2021-11-23 01:58:59,802 INFO L226 Difference]: Without dead ends: 3702 [2021-11-23 01:58:59,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:58:59,808 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 302 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:58:59,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 528 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:58:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-11-23 01:58:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 3554. [2021-11-23 01:58:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3548 states have (on average 1.5146561443066517) internal successors, (5374), 3552 states have internal predecessors, (5374), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5379 transitions. [2021-11-23 01:59:00,029 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5379 transitions. Word has length 48 [2021-11-23 01:59:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:00,030 INFO L470 AbstractCegarLoop]: Abstraction has 3554 states and 5379 transitions. [2021-11-23 01:59:00,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 01:59:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5379 transitions. [2021-11-23 01:59:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 01:59:00,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:00,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:00,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 01:59:00,033 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1568629586, now seen corresponding path program 1 times [2021-11-23 01:59:00,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:00,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407882660] [2021-11-23 01:59:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:00,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:00,075 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 01:59:00,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:00,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407882660] [2021-11-23 01:59:00,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407882660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:00,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:00,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:00,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491793488] [2021-11-23 01:59:00,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:00,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:00,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:00,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:00,078 INFO L87 Difference]: Start difference. First operand 3554 states and 5379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 01:59:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:00,566 INFO L93 Difference]: Finished difference Result 8592 states and 13055 transitions. [2021-11-23 01:59:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:00,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 55 [2021-11-23 01:59:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:00,596 INFO L225 Difference]: With dead ends: 8592 [2021-11-23 01:59:00,597 INFO L226 Difference]: Without dead ends: 5047 [2021-11-23 01:59:00,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:00,605 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 214 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:00,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 628 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:59:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2021-11-23 01:59:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 4964. [2021-11-23 01:59:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4964 states, 4958 states have (on average 1.4441306978620412) internal successors, (7160), 4962 states have internal predecessors, (7160), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4964 states to 4964 states and 7165 transitions. [2021-11-23 01:59:00,894 INFO L78 Accepts]: Start accepts. Automaton has 4964 states and 7165 transitions. Word has length 55 [2021-11-23 01:59:00,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:00,895 INFO L470 AbstractCegarLoop]: Abstraction has 4964 states and 7165 transitions. [2021-11-23 01:59:00,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 01:59:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4964 states and 7165 transitions. [2021-11-23 01:59:00,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 01:59:00,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:00,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:00,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 01:59:00,898 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:00,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:00,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1247083202, now seen corresponding path program 1 times [2021-11-23 01:59:00,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:00,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873859702] [2021-11-23 01:59:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:00,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:00,958 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 01:59:00,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873859702] [2021-11-23 01:59:00,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873859702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:00,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:00,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:59:00,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745648214] [2021-11-23 01:59:00,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:00,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:00,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:00,961 INFO L87 Difference]: Start difference. First operand 4964 states and 7165 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 01:59:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:01,337 INFO L93 Difference]: Finished difference Result 9784 states and 14152 transitions. [2021-11-23 01:59:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:01,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 57 [2021-11-23 01:59:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:01,373 INFO L225 Difference]: With dead ends: 9784 [2021-11-23 01:59:01,374 INFO L226 Difference]: Without dead ends: 4829 [2021-11-23 01:59:01,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:01,384 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 287 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:01,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 334 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2021-11-23 01:59:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2021-11-23 01:59:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4823 states have (on average 1.4349989633008502) internal successors, (6921), 4827 states have internal predecessors, (6921), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 6926 transitions. [2021-11-23 01:59:01,675 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 6926 transitions. Word has length 57 [2021-11-23 01:59:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:01,679 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 6926 transitions. [2021-11-23 01:59:01,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 01:59:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 6926 transitions. [2021-11-23 01:59:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 01:59:01,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:01,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:01,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 01:59:01,684 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1900326386, now seen corresponding path program 1 times [2021-11-23 01:59:01,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:01,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276574530] [2021-11-23 01:59:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:01,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:01,751 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 01:59:01,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:01,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276574530] [2021-11-23 01:59:01,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276574530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:01,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:01,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:01,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905872076] [2021-11-23 01:59:01,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:01,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:01,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:01,757 INFO L87 Difference]: Start difference. First operand 4829 states and 6926 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 01:59:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:02,125 INFO L93 Difference]: Finished difference Result 10075 states and 14616 transitions. [2021-11-23 01:59:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 58 [2021-11-23 01:59:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:02,176 INFO L225 Difference]: With dead ends: 10075 [2021-11-23 01:59:02,177 INFO L226 Difference]: Without dead ends: 5255 [2021-11-23 01:59:02,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:02,186 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 264 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:02,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 751 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2021-11-23 01:59:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 3693. [2021-11-23 01:59:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 3687 states have (on average 1.4521291022511527) internal successors, (5354), 3691 states have internal predecessors, (5354), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 5359 transitions. [2021-11-23 01:59:02,403 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 5359 transitions. Word has length 58 [2021-11-23 01:59:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:02,404 INFO L470 AbstractCegarLoop]: Abstraction has 3693 states and 5359 transitions. [2021-11-23 01:59:02,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 01:59:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 5359 transitions. [2021-11-23 01:59:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 01:59:02,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:02,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:02,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 01:59:02,406 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:02,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1982651402, now seen corresponding path program 1 times [2021-11-23 01:59:02,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:02,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128381785] [2021-11-23 01:59:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:02,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:02,510 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 01:59:02,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128381785] [2021-11-23 01:59:02,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128381785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:02,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:02,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:59:02,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392413160] [2021-11-23 01:59:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:02,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:59:02,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:02,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:59:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:59:02,514 INFO L87 Difference]: Start difference. First operand 3693 states and 5359 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 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 01:59:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:03,787 INFO L93 Difference]: Finished difference Result 16798 states and 24182 transitions. [2021-11-23 01:59:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 01:59:03,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 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 60 [2021-11-23 01:59:03,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:03,827 INFO L225 Difference]: With dead ends: 16798 [2021-11-23 01:59:03,827 INFO L226 Difference]: Without dead ends: 13202 [2021-11-23 01:59:03,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-23 01:59:03,839 INFO L933 BasicCegarLoop]: 1192 mSDtfsCounter, 2082 mSDsluCounter, 3704 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2082 SdHoareTripleChecker+Valid, 4523 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:03,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2082 Valid, 4523 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 01:59:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13202 states. [2021-11-23 01:59:04,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13202 to 4467. [2021-11-23 01:59:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4467 states, 4461 states have (on average 1.4440708361353956) internal successors, (6442), 4465 states have internal predecessors, (6442), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6447 transitions. [2021-11-23 01:59:04,244 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6447 transitions. Word has length 60 [2021-11-23 01:59:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:04,245 INFO L470 AbstractCegarLoop]: Abstraction has 4467 states and 6447 transitions. [2021-11-23 01:59:04,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 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 01:59:04,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6447 transitions. [2021-11-23 01:59:04,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 01:59:04,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:04,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:04,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 01:59:04,249 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:04,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:04,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1699014877, now seen corresponding path program 1 times [2021-11-23 01:59:04,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:04,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321404062] [2021-11-23 01:59:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:04,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:04,334 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 01:59:04,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:04,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321404062] [2021-11-23 01:59:04,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321404062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:04,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:04,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 01:59:04,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857885755] [2021-11-23 01:59:04,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:04,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 01:59:04,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 01:59:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:59:04,337 INFO L87 Difference]: Start difference. First operand 4467 states and 6447 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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 01:59:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:06,719 INFO L93 Difference]: Finished difference Result 29620 states and 42518 transitions. [2021-11-23 01:59:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 01:59:06,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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 61 [2021-11-23 01:59:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:06,801 INFO L225 Difference]: With dead ends: 29620 [2021-11-23 01:59:06,801 INFO L226 Difference]: Without dead ends: 25250 [2021-11-23 01:59:06,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-11-23 01:59:06,815 INFO L933 BasicCegarLoop]: 1416 mSDtfsCounter, 3211 mSDsluCounter, 5627 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3211 SdHoareTripleChecker+Valid, 6564 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:06,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3211 Valid, 6564 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 01:59:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25250 states. [2021-11-23 01:59:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25250 to 4751. [2021-11-23 01:59:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4751 states, 4745 states have (on average 1.4343519494204426) internal successors, (6806), 4749 states have internal predecessors, (6806), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4751 states to 4751 states and 6811 transitions. [2021-11-23 01:59:07,436 INFO L78 Accepts]: Start accepts. Automaton has 4751 states and 6811 transitions. Word has length 61 [2021-11-23 01:59:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:07,436 INFO L470 AbstractCegarLoop]: Abstraction has 4751 states and 6811 transitions. [2021-11-23 01:59:07,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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 01:59:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4751 states and 6811 transitions. [2021-11-23 01:59:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 01:59:07,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:07,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:07,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 01:59:07,439 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash 597837696, now seen corresponding path program 1 times [2021-11-23 01:59:07,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:07,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106296194] [2021-11-23 01:59:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:07,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:07,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:07,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106296194] [2021-11-23 01:59:07,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106296194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:07,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:07,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:59:07,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843640063] [2021-11-23 01:59:07,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:07,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:07,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:07,475 INFO L87 Difference]: Start difference. First operand 4751 states and 6811 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 01:59:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:07,911 INFO L93 Difference]: Finished difference Result 10027 states and 14343 transitions. [2021-11-23 01:59:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:07,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 72 [2021-11-23 01:59:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:07,926 INFO L225 Difference]: With dead ends: 10027 [2021-11-23 01:59:07,926 INFO L226 Difference]: Without dead ends: 5300 [2021-11-23 01:59:07,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:07,937 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 130 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:07,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 632 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2021-11-23 01:59:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 4802. [2021-11-23 01:59:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4796 states have (on average 1.4311926605504588) internal successors, (6864), 4800 states have internal predecessors, (6864), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 6869 transitions. [2021-11-23 01:59:08,350 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 6869 transitions. Word has length 72 [2021-11-23 01:59:08,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:08,350 INFO L470 AbstractCegarLoop]: Abstraction has 4802 states and 6869 transitions. [2021-11-23 01:59:08,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 01:59:08,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 6869 transitions. [2021-11-23 01:59:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 01:59:08,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:08,359 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:08,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 01:59:08,359 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1227909120, now seen corresponding path program 1 times [2021-11-23 01:59:08,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:08,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784684641] [2021-11-23 01:59:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:08,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:08,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784684641] [2021-11-23 01:59:08,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784684641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:08,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:08,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:59:08,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553439840] [2021-11-23 01:59:08,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:08,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:59:08,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:08,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:59:08,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:59:08,415 INFO L87 Difference]: Start difference. First operand 4802 states and 6869 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 01:59:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:08,998 INFO L93 Difference]: Finished difference Result 11565 states and 16492 transitions. [2021-11-23 01:59:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:59:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 83 [2021-11-23 01:59:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:09,019 INFO L225 Difference]: With dead ends: 11565 [2021-11-23 01:59:09,020 INFO L226 Difference]: Without dead ends: 6714 [2021-11-23 01:59:09,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:59:09,031 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 438 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:09,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 969 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6714 states. [2021-11-23 01:59:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6714 to 5439. [2021-11-23 01:59:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5433 states have (on average 1.4163445610160132) internal successors, (7695), 5437 states have internal predecessors, (7695), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 7700 transitions. [2021-11-23 01:59:09,483 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 7700 transitions. Word has length 83 [2021-11-23 01:59:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:09,484 INFO L470 AbstractCegarLoop]: Abstraction has 5439 states and 7700 transitions. [2021-11-23 01:59:09,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 01:59:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 7700 transitions. [2021-11-23 01:59:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 01:59:09,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:09,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:09,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 01:59:09,487 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1899060307, now seen corresponding path program 1 times [2021-11-23 01:59:09,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:09,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37095601] [2021-11-23 01:59:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:09,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:09,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:09,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37095601] [2021-11-23 01:59:09,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37095601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:09,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:09,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 01:59:09,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127810613] [2021-11-23 01:59:09,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:09,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:09,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:09,529 INFO L87 Difference]: Start difference. First operand 5439 states and 7700 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 01:59:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:09,799 INFO L93 Difference]: Finished difference Result 7990 states and 11377 transitions. [2021-11-23 01:59:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:09,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 89 [2021-11-23 01:59:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:09,805 INFO L225 Difference]: With dead ends: 7990 [2021-11-23 01:59:09,805 INFO L226 Difference]: Without dead ends: 2505 [2021-11-23 01:59:09,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:59:09,813 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 308 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:09,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 431 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-11-23 01:59:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2469. [2021-11-23 01:59:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2463 states have (on average 1.3686561104344295) internal successors, (3371), 2467 states have internal predecessors, (3371), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3376 transitions. [2021-11-23 01:59:10,017 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3376 transitions. Word has length 89 [2021-11-23 01:59:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:10,018 INFO L470 AbstractCegarLoop]: Abstraction has 2469 states and 3376 transitions. [2021-11-23 01:59:10,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 01:59:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3376 transitions. [2021-11-23 01:59:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 01:59:10,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:10,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:10,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 01:59:10,021 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1522163798, now seen corresponding path program 1 times [2021-11-23 01:59:10,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:10,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762049507] [2021-11-23 01:59:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:10,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:10,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762049507] [2021-11-23 01:59:10,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762049507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:10,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:59:10,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:59:10,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142955739] [2021-11-23 01:59:10,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:10,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:59:10,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:10,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:59:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:59:10,071 INFO L87 Difference]: Start difference. First operand 2469 states and 3376 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 01:59:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:11,009 INFO L93 Difference]: Finished difference Result 9402 states and 12914 transitions. [2021-11-23 01:59:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 01:59:11,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 93 [2021-11-23 01:59:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:11,024 INFO L225 Difference]: With dead ends: 9402 [2021-11-23 01:59:11,024 INFO L226 Difference]: Without dead ends: 7048 [2021-11-23 01:59:11,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 01:59:11,034 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 1410 mSDsluCounter, 2031 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:11,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 2695 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:59:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7048 states. [2021-11-23 01:59:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7048 to 2471. [2021-11-23 01:59:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.365922920892495) internal successors, (3367), 2469 states have internal predecessors, (3367), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3372 transitions. [2021-11-23 01:59:11,338 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3372 transitions. Word has length 93 [2021-11-23 01:59:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:11,338 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 3372 transitions. [2021-11-23 01:59:11,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 01:59:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3372 transitions. [2021-11-23 01:59:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 01:59:11,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:11,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:11,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 01:59:11,341 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:11,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:11,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1494756239, now seen corresponding path program 1 times [2021-11-23 01:59:11,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:11,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966924211] [2021-11-23 01:59:11,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:11,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:11,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:11,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966924211] [2021-11-23 01:59:11,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966924211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:11,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63488912] [2021-11-23 01:59:11,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:11,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:11,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:11,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:11,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:59:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:11,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:59:11,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 01:59:11,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:59:11,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63488912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:11,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:59:11,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 01:59:11,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929706503] [2021-11-23 01:59:11,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:11,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:11,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:11,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:11,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:11,872 INFO L87 Difference]: Start difference. First operand 2471 states and 3372 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 01:59:12,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:12,216 INFO L93 Difference]: Finished difference Result 2496 states and 3395 transitions. [2021-11-23 01:59:12,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:12,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 95 [2021-11-23 01:59:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:12,222 INFO L225 Difference]: With dead ends: 2496 [2021-11-23 01:59:12,222 INFO L226 Difference]: Without dead ends: 2492 [2021-11-23 01:59:12,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:12,225 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 208 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:12,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 638 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2021-11-23 01:59:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2471. [2021-11-23 01:59:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.3606490872210952) internal successors, (3354), 2469 states have internal predecessors, (3354), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3359 transitions. [2021-11-23 01:59:12,481 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3359 transitions. Word has length 95 [2021-11-23 01:59:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:12,481 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 3359 transitions. [2021-11-23 01:59:12,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 01:59:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3359 transitions. [2021-11-23 01:59:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-23 01:59:12,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:12,485 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:12,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:59:12,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 01:59:12,709 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2097237699, now seen corresponding path program 1 times [2021-11-23 01:59:12,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:12,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061380298] [2021-11-23 01:59:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:12,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:59:12,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:12,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061380298] [2021-11-23 01:59:12,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061380298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:12,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116043044] [2021-11-23 01:59:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:12,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:12,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:12,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:12,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:59:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:59:12,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 01:59:13,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:59:13,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116043044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:13,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:59:13,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 01:59:13,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134632017] [2021-11-23 01:59:13,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:13,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:13,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:13,218 INFO L87 Difference]: Start difference. First operand 2471 states and 3359 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 01:59:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:13,525 INFO L93 Difference]: Finished difference Result 4805 states and 6569 transitions. [2021-11-23 01:59:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:13,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 148 [2021-11-23 01:59:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:13,531 INFO L225 Difference]: With dead ends: 4805 [2021-11-23 01:59:13,531 INFO L226 Difference]: Without dead ends: 2471 [2021-11-23 01:59:13,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:13,546 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:13,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 340 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-11-23 01:59:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2471. [2021-11-23 01:59:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.3322515212981745) internal successors, (3284), 2469 states have internal predecessors, (3284), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3289 transitions. [2021-11-23 01:59:13,750 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3289 transitions. Word has length 148 [2021-11-23 01:59:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:13,750 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 3289 transitions. [2021-11-23 01:59:13,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 01:59:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3289 transitions. [2021-11-23 01:59:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 01:59:13,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:13,754 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:13,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:59:13,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 01:59:13,981 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2103517487, now seen corresponding path program 1 times [2021-11-23 01:59:13,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:13,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544527312] [2021-11-23 01:59:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:13,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 01:59:14,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:14,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544527312] [2021-11-23 01:59:14,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544527312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:14,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092353814] [2021-11-23 01:59:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:14,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:14,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:14,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:14,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:59:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:14,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:59:14,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 01:59:14,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:59:14,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092353814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:14,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:59:14,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 01:59:14,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915004069] [2021-11-23 01:59:14,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:14,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:14,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:14,469 INFO L87 Difference]: Start difference. First operand 2471 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 01:59:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:14,747 INFO L93 Difference]: Finished difference Result 4805 states and 6429 transitions. [2021-11-23 01:59:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:14,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 151 [2021-11-23 01:59:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:14,752 INFO L225 Difference]: With dead ends: 4805 [2021-11-23 01:59:14,753 INFO L226 Difference]: Without dead ends: 2471 [2021-11-23 01:59:14,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:14,758 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 247 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:14,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 312 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:59:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-11-23 01:59:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2471. [2021-11-23 01:59:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.3038539553752535) internal successors, (3214), 2469 states have internal predecessors, (3214), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3219 transitions. [2021-11-23 01:59:14,956 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3219 transitions. Word has length 151 [2021-11-23 01:59:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:14,957 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 3219 transitions. [2021-11-23 01:59:14,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 01:59:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3219 transitions. [2021-11-23 01:59:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 01:59:14,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:14,961 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:14,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:59:15,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 01:59:15,185 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash 429733012, now seen corresponding path program 1 times [2021-11-23 01:59:15,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:15,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896232491] [2021-11-23 01:59:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:15,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 01:59:15,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:15,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896232491] [2021-11-23 01:59:15,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896232491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:15,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487229852] [2021-11-23 01:59:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:15,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:15,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:15,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:15,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:59:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:15,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 01:59:15,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:59:15,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:59:15,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487229852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:59:15,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:59:15,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 01:59:15,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094193848] [2021-11-23 01:59:15,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:59:15,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:59:15,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:59:15,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:59:15,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:15,668 INFO L87 Difference]: Start difference. First operand 2471 states and 3219 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 01:59:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:59:16,184 INFO L93 Difference]: Finished difference Result 5544 states and 7364 transitions. [2021-11-23 01:59:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:59:16,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 152 [2021-11-23 01:59:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:59:16,193 INFO L225 Difference]: With dead ends: 5544 [2021-11-23 01:59:16,193 INFO L226 Difference]: Without dead ends: 3210 [2021-11-23 01:59:16,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:59:16,198 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 181 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:59:16,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 554 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:59:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-11-23 01:59:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3026. [2021-11-23 01:59:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3020 states have (on average 1.2841059602649008) internal successors, (3878), 3024 states have internal predecessors, (3878), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:59:16,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 3883 transitions. [2021-11-23 01:59:16,407 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 3883 transitions. Word has length 152 [2021-11-23 01:59:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:59:16,407 INFO L470 AbstractCegarLoop]: Abstraction has 3026 states and 3883 transitions. [2021-11-23 01:59:16,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 01:59:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 3883 transitions. [2021-11-23 01:59:16,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 01:59:16,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:59:16,411 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:59:16,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:59:16,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:16,636 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:59:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:59:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2145869779, now seen corresponding path program 1 times [2021-11-23 01:59:16,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:59:16,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514048190] [2021-11-23 01:59:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:16,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:59:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 01:59:16,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:59:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514048190] [2021-11-23 01:59:16,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514048190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:59:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312621969] [2021-11-23 01:59:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:59:16,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:59:16,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:59:16,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:59:16,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 01:59:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:59:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 01:59:16,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:59:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 01:59:17,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:59:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 01:59:17,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312621969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:59:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182836295] [2021-11-23 01:59:17,792 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2021-11-23 01:59:17,792 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:59:17,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:59:17,803 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:59:17,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:00:00,306 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:00:54,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1182836295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:54,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:00:54,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [9, 9, 9] total 59 [2021-11-23 02:00:54,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490051449] [2021-11-23 02:00:54,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:54,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 02:00:54,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 02:00:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 02:00:54,376 INFO L87 Difference]: Start difference. First operand 3026 states and 3883 transitions. Second operand has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 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 02:01:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:01:20,352 INFO L93 Difference]: Finished difference Result 6089 states and 7807 transitions. [2021-11-23 02:01:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 02:01:20,353 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 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 154 [2021-11-23 02:01:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:01:20,362 INFO L225 Difference]: With dead ends: 6089 [2021-11-23 02:01:20,363 INFO L226 Difference]: Without dead ends: 3055 [2021-11-23 02:01:20,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 379 SyntacticMatches, 34 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 65.9s TimeCoverageRelationStatistics Valid=319, Invalid=4793, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 02:01:20,399 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 186 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 9410 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 9476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 9410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:01:20,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1371 Invalid, 9476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [66 Valid, 9410 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2021-11-23 02:01:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-11-23 02:01:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3050. [2021-11-23 02:01:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 3044 states have (on average 1.2792378449408672) internal successors, (3894), 3048 states have internal predecessors, (3894), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:01:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 3899 transitions. [2021-11-23 02:01:20,721 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 3899 transitions. Word has length 154 [2021-11-23 02:01:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:01:20,722 INFO L470 AbstractCegarLoop]: Abstraction has 3050 states and 3899 transitions. [2021-11-23 02:01:20,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 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 02:01:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 3899 transitions. [2021-11-23 02:01:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-23 02:01:20,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:01:20,728 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:01:20,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:01:20,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:20,953 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:01:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:01:20,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1188463544, now seen corresponding path program 1 times [2021-11-23 02:01:20,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:01:20,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261854554] [2021-11-23 02:01:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:20,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:01:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:01:21,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:01:21,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261854554] [2021-11-23 02:01:21,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261854554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:01:21,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087055808] [2021-11-23 02:01:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:01:21,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:01:21,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:01:21,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:01:21,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:01:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:01:21,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:01:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:01:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:01:22,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:01:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:01:23,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087055808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:01:23,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098418043] [2021-11-23 02:01:23,291 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2021-11-23 02:01:23,291 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:01:23,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:01:23,292 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:01:23,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:02:13,581 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 105 for LOIs [2021-11-23 02:02:13,609 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:03:01,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319852#(and (= ~c_read_req_ev~0 2) (or (and (<= ~rsp_t_status___0~0 1) (<= 0 ~req_t_d___0~0) (not (= ~c_req_a~0 1)) (<= 0 ~c_rsp_status~0) (<= 0 ~rsp_t_type___0~0) (<= 0 ~rsp_t_status___0~0) (= ~c_req_type~0 1) (= ~rsp_tt_status~0 0) (<= ~rsp_t_type___0~0 1) (<= 0 ~s_memory1~0) (= ~s_memory2~0 0) (<= ~req_t_type___0~0 1) (= ~req_t_type~0 1) (<= 0 ~req_t_type___0~0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (<= 50 ~req_t_d~0) (<= 50 ~c_req_d~0) (not (= 3 ~c_req_a~0)) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (= 2 ~s_run_pc~0) (<= 0 ~s_memory0~0) (<= 0 ~c_rsp_type~0) (<= ~c_rsp_status~0 1) (<= 0 ~a_t~0) (= ~c_empty_req~0 1) (<= ~c_rsp_type~0 1) (<= 0 ~c_req_a~0) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (not (= ~c_req_a~0 0)) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (<= 0 ~req_t_a___0~0) (<= 0 ~req_t_a~0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (<= 0 |#StackHeapBarrier|) (not (= 2 ~c_req_a~0)) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (= |#NULL.base| 0)) (and (<= ~rsp_t_status___0~0 1) (<= 0 ~req_t_d___0~0) (not (= ~c_req_a~0 1)) (<= 0 ~c_rsp_status~0) (<= 0 ~rsp_t_type___0~0) (<= 0 ~rsp_t_status___0~0) (= ~c_req_type~0 1) (= ~rsp_tt_status~0 0) (<= ~rsp_t_type___0~0 1) (<= 0 ~s_memory1~0) (= ~s_memory2~0 0) (<= ~req_t_type___0~0 1) (= ~s_run_pc~0 0) (= ~req_t_type~0 1) (<= 0 ~req_t_type___0~0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (<= 50 ~req_t_d~0) (<= 50 ~c_req_d~0) (not (= 3 ~c_req_a~0)) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (<= 0 ~s_memory0~0) (<= 0 ~c_rsp_type~0) (<= ~c_rsp_status~0 1) (<= 0 ~a_t~0) (= ~c_empty_req~0 1) (<= ~c_rsp_type~0 1) (<= 0 ~c_req_a~0) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (not (= ~c_req_a~0 0)) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (<= 0 ~req_t_a___0~0) (<= 0 ~req_t_a~0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (<= 0 |#StackHeapBarrier|) (not (= 2 ~c_req_a~0)) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (= |#NULL.base| 0))))' at error location [2021-11-23 02:03:01,250 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:03:01,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:03:01,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-11-23 02:03:01,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143339462] [2021-11-23 02:03:01,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:03:01,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:03:01,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:03:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:03:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3933, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 02:03:01,256 INFO L87 Difference]: Start difference. First operand 3050 states and 3899 transitions. Second operand has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 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 02:03:05,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:03:05,390 INFO L93 Difference]: Finished difference Result 18759 states and 24119 transitions. [2021-11-23 02:03:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 02:03:05,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 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 249 [2021-11-23 02:03:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:03:05,428 INFO L225 Difference]: With dead ends: 18759 [2021-11-23 02:03:05,428 INFO L226 Difference]: Without dead ends: 15870 [2021-11-23 02:03:05,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 681 SyntacticMatches, 31 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=477, Invalid=9225, Unknown=0, NotChecked=0, Total=9702 [2021-11-23 02:03:05,441 INFO L933 BasicCegarLoop]: 1193 mSDtfsCounter, 5395 mSDsluCounter, 9141 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5395 SdHoareTripleChecker+Valid, 9527 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:03:05,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5395 Valid, 9527 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:03:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15870 states. [2021-11-23 02:03:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15870 to 5642. [2021-11-23 02:03:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5642 states, 5636 states have (on average 1.2872604684173172) internal successors, (7255), 5640 states have internal predecessors, (7255), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:03:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 7260 transitions. [2021-11-23 02:03:06,188 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 7260 transitions. Word has length 249 [2021-11-23 02:03:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:03:06,189 INFO L470 AbstractCegarLoop]: Abstraction has 5642 states and 7260 transitions. [2021-11-23 02:03:06,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 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 02:03:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 7260 transitions. [2021-11-23 02:03:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-23 02:03:06,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:03:06,198 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:03:06,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:03:06,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:03:06,413 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:03:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:03:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash 555993336, now seen corresponding path program 1 times [2021-11-23 02:03:06,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:03:06,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47194441] [2021-11-23 02:03:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:06,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:03:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 122 proven. 329 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:03:06,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:03:06,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47194441] [2021-11-23 02:03:06,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47194441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:03:06,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952597786] [2021-11-23 02:03:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:03:06,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:03:06,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:03:06,720 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:03:06,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:03:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:03:06,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 02:03:06,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:03:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 436 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:03:07,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:03:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 436 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:03:08,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952597786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:03:08,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124792001] [2021-11-23 02:03:08,852 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2021-11-23 02:03:08,852 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:03:08,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:03:08,853 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:03:08,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:04:15,503 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 105 for LOIs [2021-11-23 02:04:15,545 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:05:13,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '357836#(and (= ~c_read_req_ev~0 2) (or (and (<= ~rsp_t_status___0~0 1) (<= 0 ~req_t_d___0~0) (not (= ~c_req_a~0 1)) (<= 0 ~c_rsp_status~0) (<= 0 ~rsp_t_type___0~0) (<= 0 ~rsp_t_status___0~0) (= ~c_req_type~0 1) (= ~rsp_tt_status~0 0) (<= ~rsp_t_type___0~0 1) (<= 0 ~s_memory1~0) (<= ~req_t_type___0~0 1) (= ~req_t_type~0 1) (<= 0 ~req_t_type___0~0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (<= 50 ~req_t_d~0) (<= 50 ~c_req_d~0) (not (= 3 ~c_req_a~0)) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (= 2 ~s_run_pc~0) (<= 0 ~s_memory0~0) (<= 0 ~c_rsp_type~0) (<= ~c_rsp_status~0 1) (<= 0 ~a_t~0) (= ~c_empty_req~0 1) (<= ~c_rsp_type~0 1) (<= 0 ~c_req_a~0) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (not (= ~c_req_a~0 0)) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (<= 0 ~req_t_a___0~0) (<= 0 ~req_t_a~0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (<= 0 |#StackHeapBarrier|) (not (= 2 ~c_req_a~0)) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (<= 0 ~s_memory2~0) (= |#NULL.base| 0)) (and (<= ~rsp_t_status___0~0 1) (<= 0 ~req_t_d___0~0) (not (= ~c_req_a~0 1)) (<= 0 ~c_rsp_status~0) (<= 0 ~rsp_t_type___0~0) (<= 0 ~rsp_t_status___0~0) (= ~c_req_type~0 1) (= ~rsp_tt_status~0 0) (<= ~rsp_t_type___0~0 1) (<= 0 ~s_memory1~0) (<= ~req_t_type___0~0 1) (= ~s_run_pc~0 0) (= ~req_t_type~0 1) (<= 0 ~req_t_type___0~0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (<= 50 ~req_t_d~0) (<= 50 ~c_req_d~0) (not (= 3 ~c_req_a~0)) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (<= 0 ~s_memory0~0) (<= 0 ~c_rsp_type~0) (<= ~c_rsp_status~0 1) (<= 0 ~a_t~0) (= ~c_empty_req~0 1) (<= ~c_rsp_type~0 1) (<= 0 ~c_req_a~0) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (not (= ~c_req_a~0 0)) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (<= 0 ~req_t_a___0~0) (<= 0 ~req_t_a~0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (<= 0 |#StackHeapBarrier|) (not (= 2 ~c_req_a~0)) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (<= 0 ~s_memory2~0) (= |#NULL.base| 0))))' at error location [2021-11-23 02:05:13,943 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:05:13,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:05:13,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2021-11-23 02:05:13,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540790808] [2021-11-23 02:05:13,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:05:13,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:05:13,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:05:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=4717, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 02:05:13,949 INFO L87 Difference]: Start difference. First operand 5642 states and 7260 transitions. Second operand has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 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 02:05:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:20,773 INFO L93 Difference]: Finished difference Result 25101 states and 32310 transitions. [2021-11-23 02:05:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-23 02:05:20,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 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 345 [2021-11-23 02:05:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:20,807 INFO L225 Difference]: With dead ends: 25101 [2021-11-23 02:05:20,807 INFO L226 Difference]: Without dead ends: 19620 [2021-11-23 02:05:20,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 937 SyntacticMatches, 72 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7312 ImplicationChecksByTransitivity, 61.0s TimeCoverageRelationStatistics Valid=912, Invalid=15090, Unknown=0, NotChecked=0, Total=16002 [2021-11-23 02:05:20,828 INFO L933 BasicCegarLoop]: 1700 mSDtfsCounter, 11952 mSDsluCounter, 20138 mSDsCounter, 0 mSdLazyCounter, 3397 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11952 SdHoareTripleChecker+Valid, 20125 SdHoareTripleChecker+Invalid, 3899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 3397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:20,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11952 Valid, 20125 Invalid, 3899 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [502 Valid, 3397 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:05:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2021-11-23 02:05:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 6679. [2021-11-23 02:05:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6679 states, 6673 states have (on average 1.2913232429192267) internal successors, (8617), 6677 states have internal predecessors, (8617), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:21,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6679 states to 6679 states and 8622 transitions. [2021-11-23 02:05:21,687 INFO L78 Accepts]: Start accepts. Automaton has 6679 states and 8622 transitions. Word has length 345 [2021-11-23 02:05:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:21,689 INFO L470 AbstractCegarLoop]: Abstraction has 6679 states and 8622 transitions. [2021-11-23 02:05:21,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 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 02:05:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 6679 states and 8622 transitions. [2021-11-23 02:05:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-11-23 02:05:21,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:21,696 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:21,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:21,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:21,913 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:21,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1446490688, now seen corresponding path program 1 times [2021-11-23 02:05:21,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:21,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632693467] [2021-11-23 02:05:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:21,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2021-11-23 02:05:22,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632693467] [2021-11-23 02:05:22,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632693467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:22,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:22,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:05:22,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384430159] [2021-11-23 02:05:22,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:22,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:05:22,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:05:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:05:22,099 INFO L87 Difference]: Start difference. First operand 6679 states and 8622 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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 02:05:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:25,663 INFO L93 Difference]: Finished difference Result 28956 states and 37515 transitions. [2021-11-23 02:05:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:05:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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 443 [2021-11-23 02:05:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:25,735 INFO L225 Difference]: With dead ends: 28956 [2021-11-23 02:05:25,735 INFO L226 Difference]: Without dead ends: 22438 [2021-11-23 02:05:25,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-11-23 02:05:25,756 INFO L933 BasicCegarLoop]: 1130 mSDtfsCounter, 2634 mSDsluCounter, 5154 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2634 SdHoareTripleChecker+Valid, 5793 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:25,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2634 Valid, 5793 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:05:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22438 states. [2021-11-23 02:05:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22438 to 7034. [2021-11-23 02:05:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7028 states have (on average 1.291548093340922) internal successors, (9077), 7032 states have internal predecessors, (9077), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 9082 transitions. [2021-11-23 02:05:26,881 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 9082 transitions. Word has length 443 [2021-11-23 02:05:26,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:26,883 INFO L470 AbstractCegarLoop]: Abstraction has 7034 states and 9082 transitions. [2021-11-23 02:05:26,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 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 02:05:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 9082 transitions. [2021-11-23 02:05:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-11-23 02:05:26,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:26,890 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:26,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:05:26,890 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -628237267, now seen corresponding path program 1 times [2021-11-23 02:05:26,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:26,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146039005] [2021-11-23 02:05:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:26,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2021-11-23 02:05:27,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:27,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146039005] [2021-11-23 02:05:27,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146039005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:27,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:27,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:05:27,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916217012] [2021-11-23 02:05:27,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:27,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:05:27,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:05:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:05:27,057 INFO L87 Difference]: Start difference. First operand 7034 states and 9082 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 02:05:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:29,628 INFO L93 Difference]: Finished difference Result 25474 states and 32883 transitions. [2021-11-23 02:05:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:05:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 444 [2021-11-23 02:05:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:29,661 INFO L225 Difference]: With dead ends: 25474 [2021-11-23 02:05:29,661 INFO L226 Difference]: Without dead ends: 18601 [2021-11-23 02:05:29,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:05:29,674 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 1084 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:29,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 2092 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:05:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18601 states. [2021-11-23 02:05:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18601 to 7694. [2021-11-23 02:05:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7694 states, 7688 states have (on average 1.2868106139438085) internal successors, (9893), 7692 states have internal predecessors, (9893), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 9898 transitions. [2021-11-23 02:05:30,817 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 9898 transitions. Word has length 444 [2021-11-23 02:05:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:30,818 INFO L470 AbstractCegarLoop]: Abstraction has 7694 states and 9898 transitions. [2021-11-23 02:05:30,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 02:05:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 9898 transitions. [2021-11-23 02:05:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-11-23 02:05:30,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:30,828 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:30,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:05:30,829 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1241598043, now seen corresponding path program 1 times [2021-11-23 02:05:30,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:30,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871301412] [2021-11-23 02:05:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:30,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-11-23 02:05:30,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871301412] [2021-11-23 02:05:30,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871301412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:30,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:30,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:05:30,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731092510] [2021-11-23 02:05:30,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:30,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:05:30,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:05:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:05:30,991 INFO L87 Difference]: Start difference. First operand 7694 states and 9898 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 02:05:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:32,441 INFO L93 Difference]: Finished difference Result 18032 states and 23289 transitions. [2021-11-23 02:05:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:05:32,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 482 [2021-11-23 02:05:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:32,460 INFO L225 Difference]: With dead ends: 18032 [2021-11-23 02:05:32,460 INFO L226 Difference]: Without dead ends: 10499 [2021-11-23 02:05:32,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:05:32,471 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 205 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:32,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 664 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:05:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2021-11-23 02:05:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10438. [2021-11-23 02:05:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10438 states, 10432 states have (on average 1.2760736196319018) internal successors, (13312), 10436 states have internal predecessors, (13312), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10438 states to 10438 states and 13317 transitions. [2021-11-23 02:05:33,893 INFO L78 Accepts]: Start accepts. Automaton has 10438 states and 13317 transitions. Word has length 482 [2021-11-23 02:05:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:33,893 INFO L470 AbstractCegarLoop]: Abstraction has 10438 states and 13317 transitions. [2021-11-23 02:05:33,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 02:05:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 10438 states and 13317 transitions. [2021-11-23 02:05:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-11-23 02:05:33,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:33,905 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:33,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:05:33,905 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:33,906 INFO L85 PathProgramCache]: Analyzing trace with hash -334192837, now seen corresponding path program 1 times [2021-11-23 02:05:33,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:33,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605870279] [2021-11-23 02:05:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:33,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2021-11-23 02:05:34,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:34,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605870279] [2021-11-23 02:05:34,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605870279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:34,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:34,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:05:34,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906111856] [2021-11-23 02:05:34,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:34,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:05:34,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:05:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:05:34,079 INFO L87 Difference]: Start difference. First operand 10438 states and 13317 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 02:05:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:35,403 INFO L93 Difference]: Finished difference Result 17801 states and 22778 transitions. [2021-11-23 02:05:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:05:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 483 [2021-11-23 02:05:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:35,417 INFO L225 Difference]: With dead ends: 17801 [2021-11-23 02:05:35,417 INFO L226 Difference]: Without dead ends: 7524 [2021-11-23 02:05:35,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:05:35,429 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 34 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:35,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 528 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:05:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7524 states. [2021-11-23 02:05:36,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7524 to 6710. [2021-11-23 02:05:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6710 states, 6704 states have (on average 1.2775954653937946) internal successors, (8565), 6708 states have internal predecessors, (8565), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6710 states to 6710 states and 8570 transitions. [2021-11-23 02:05:36,289 INFO L78 Accepts]: Start accepts. Automaton has 6710 states and 8570 transitions. Word has length 483 [2021-11-23 02:05:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:36,290 INFO L470 AbstractCegarLoop]: Abstraction has 6710 states and 8570 transitions. [2021-11-23 02:05:36,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 02:05:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6710 states and 8570 transitions. [2021-11-23 02:05:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-23 02:05:36,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:36,299 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:36,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:05:36,300 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:36,301 INFO L85 PathProgramCache]: Analyzing trace with hash 559503769, now seen corresponding path program 1 times [2021-11-23 02:05:36,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:36,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835593987] [2021-11-23 02:05:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:36,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-11-23 02:05:36,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:36,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835593987] [2021-11-23 02:05:36,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835593987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:36,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:36,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:05:36,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219605181] [2021-11-23 02:05:36,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:36,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:05:36,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:05:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:05:36,489 INFO L87 Difference]: Start difference. First operand 6710 states and 8570 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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 02:05:37,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:37,492 INFO L93 Difference]: Finished difference Result 11901 states and 15255 transitions. [2021-11-23 02:05:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:05:37,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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 484 [2021-11-23 02:05:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:37,502 INFO L225 Difference]: With dead ends: 11901 [2021-11-23 02:05:37,502 INFO L226 Difference]: Without dead ends: 5352 [2021-11-23 02:05:37,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:05:37,511 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 218 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:37,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 827 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:05:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5352 states. [2021-11-23 02:05:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5352 to 5313. [2021-11-23 02:05:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5307 states have (on average 1.259657056717543) internal successors, (6685), 5311 states have internal predecessors, (6685), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 6690 transitions. [2021-11-23 02:05:38,319 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 6690 transitions. Word has length 484 [2021-11-23 02:05:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:38,319 INFO L470 AbstractCegarLoop]: Abstraction has 5313 states and 6690 transitions. [2021-11-23 02:05:38,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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 02:05:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 6690 transitions. [2021-11-23 02:05:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2021-11-23 02:05:38,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:38,326 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:38,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 02:05:38,327 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:38,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:38,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1493098007, now seen corresponding path program 1 times [2021-11-23 02:05:38,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:38,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323495109] [2021-11-23 02:05:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:38,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 91 proven. 303 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-23 02:05:39,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:39,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323495109] [2021-11-23 02:05:39,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323495109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:39,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830471732] [2021-11-23 02:05:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:39,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:39,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:39,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:39,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddf79aee-9a70-44c1-ad81-e6f6c5831c00/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:05:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:39,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:05:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 93 proven. 253 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-23 02:05:42,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 25 proven. 321 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-23 02:05:44,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830471732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:44,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118609135] [2021-11-23 02:05:44,855 INFO L159 IcfgInterpreter]: Started Sifa with 161 locations of interest [2021-11-23 02:05:44,855 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:05:44,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:05:44,857 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:05:44,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs