./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7 --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 4859a4cdb98a3caca502aed15b30b6d563e2037c3c786a209b1853d003f6e66c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:07:03,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:07:03,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:07:03,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:07:03,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:07:03,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:07:03,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:07:03,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:07:03,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:07:03,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:07:03,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:07:03,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:07:03,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:07:03,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:07:03,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:07:03,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:07:03,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:07:03,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:07:03,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:07:03,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:07:03,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:07:03,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:07:03,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:07:03,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:07:03,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:07:03,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:07:03,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:07:03,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:07:03,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:07:03,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:07:03,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:07:03,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:07:03,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:07:03,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:07:03,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:07:03,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:07:03,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:07:03,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:07:03,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:07:03,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:07:03,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:07:03,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:07:03,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:07:03,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:07:03,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:07:03,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:07:03,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:07:03,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:07:03,732 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:07:03,732 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:07:03,732 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:07:03,732 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:07:03,734 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:07:03,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:07:03,734 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:07:03,734 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:07:03,734 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:07:03,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:07:03,735 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:07:03,735 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:07:03,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:07:03,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:07:03,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:07:03,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:07:03,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:07:03,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:07:03,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:07:03,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:07:03,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:07:03,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:07:03,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:07:03,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:07:03,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:07:03,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:07:03,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:07:03,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:07:03,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:07:03,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:07:03,741 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:07:03,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:07:03,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:07:03,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:07:03,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:07:03,742 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_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4859a4cdb98a3caca502aed15b30b6d563e2037c3c786a209b1853d003f6e66c [2021-11-25 19:07:03,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:07:04,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:07:04,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:07:04,030 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:07:04,030 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:07:04,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c [2021-11-25 19:07:04,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/data/c5900a1c0/2daefab994ca4a2899dc9f0fc5ed40e4/FLAG7d45c03b1 [2021-11-25 19:07:05,132 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:07:05,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c [2021-11-25 19:07:05,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/data/c5900a1c0/2daefab994ca4a2899dc9f0fc5ed40e4/FLAG7d45c03b1 [2021-11-25 19:07:05,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/data/c5900a1c0/2daefab994ca4a2899dc9f0fc5ed40e4 [2021-11-25 19:07:05,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:07:05,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:07:05,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:07:05,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:07:05,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:07:05,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:07:05" (1/1) ... [2021-11-25 19:07:05,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d0a2139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:05, skipping insertion in model container [2021-11-25 19:07:05,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:07:05" (1/1) ... [2021-11-25 19:07:05,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:07:05,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:07:08,223 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_0390a827-1fe0-4d90-8412-654d0c3bae8f/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c[378560,378573] [2021-11-25 19:07:08,259 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_0390a827-1fe0-4d90-8412-654d0c3bae8f/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c[383339,383352] [2021-11-25 19:07:08,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:07:08,787 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:07:10,090 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_0390a827-1fe0-4d90-8412-654d0c3bae8f/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c[378560,378573] [2021-11-25 19:07:10,100 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_0390a827-1fe0-4d90-8412-654d0c3bae8f/sv-benchmarks/c/combinations/Problem05_label42+token_ring.15.cil.c[383339,383352] [2021-11-25 19:07:10,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:07:10,240 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:07:10,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10 WrapperNode [2021-11-25 19:07:10,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:07:10,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:07:10,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:07:10,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:07:10,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:10,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:10,810 INFO L137 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 13260 [2021-11-25 19:07:10,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:07:10,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:07:10,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:07:10,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:07:10,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:10,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:10,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:10,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:11,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:11,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:11,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:11,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:07:11,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:07:11,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:07:11,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:07:11,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (1/1) ... [2021-11-25 19:07:11,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:07:11,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:11,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:07:11,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:07:11,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:07:11,719 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 19:07:11,719 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 19:07:11,720 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 19:07:11,720 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 19:07:11,720 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 19:07:11,720 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 19:07:11,720 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-25 19:07:11,734 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-25 19:07:11,734 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 19:07:11,734 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 19:07:11,734 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 19:07:11,734 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 19:07:11,735 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 19:07:11,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 19:07:11,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:07:11,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:07:11,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:07:11,877 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:07:11,879 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:07:19,914 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:07:22,841 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:07:22,841 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-25 19:07:22,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:07:22 BoogieIcfgContainer [2021-11-25 19:07:22,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:07:22,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:07:22,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:07:22,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:07:22,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:07:05" (1/3) ... [2021-11-25 19:07:22,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad1688b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:07:22, skipping insertion in model container [2021-11-25 19:07:22,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:07:10" (2/3) ... [2021-11-25 19:07:22,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad1688b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:07:22, skipping insertion in model container [2021-11-25 19:07:22,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:07:22" (3/3) ... [2021-11-25 19:07:22,855 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.15.cil.c [2021-11-25 19:07:22,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:07:22,861 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 19:07:22,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:07:22,941 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 [2021-11-25 19:07:22,941 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 19:07:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1809 states have (on average 1.9541182974018796) internal successors, (3535), 1814 states have internal predecessors, (3535), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-25 19:07:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 19:07:23,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:23,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:23,022 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1505574162, now seen corresponding path program 1 times [2021-11-25 19:07:23,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:23,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410537824] [2021-11-25 19:07:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:23,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:07:23,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:23,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410537824] [2021-11-25 19:07:23,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410537824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:23,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:07:23,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:07:23,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817376552] [2021-11-25 19:07:23,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:23,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:07:23,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:07:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:07:23,531 INFO L87 Difference]: Start difference. First operand has 1848 states, 1809 states have (on average 1.9541182974018796) internal successors, (3535), 1814 states have internal predecessors, (3535), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:07:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:24,852 INFO L93 Difference]: Finished difference Result 3877 states and 7503 transitions. [2021-11-25 19:07:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:07:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2021-11-25 19:07:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:24,891 INFO L225 Difference]: With dead ends: 3877 [2021-11-25 19:07:24,891 INFO L226 Difference]: Without dead ends: 2028 [2021-11-25 19:07:24,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:07:24,912 INFO L933 BasicCegarLoop]: 3549 mSDtfsCounter, 3820 mSDsluCounter, 3759 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3820 SdHoareTripleChecker+Valid, 6994 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:24,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3820 Valid, 6994 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:07:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-11-25 19:07:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 2027. [2021-11-25 19:07:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 1961 states have (on average 1.9163691993880674) internal successors, (3758), 1965 states have internal predecessors, (3758), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-25 19:07:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3860 transitions. [2021-11-25 19:07:25,080 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3860 transitions. Word has length 71 [2021-11-25 19:07:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:25,080 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 3860 transitions. [2021-11-25 19:07:25,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:07:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3860 transitions. [2021-11-25 19:07:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:07:25,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:25,092 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:25,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:07:25,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1340033364, now seen corresponding path program 1 times [2021-11-25 19:07:25,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:25,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976546509] [2021-11-25 19:07:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:25,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:07:25,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:25,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976546509] [2021-11-25 19:07:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976546509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750025049] [2021-11-25 19:07:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:25,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:25,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:25,449 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:25,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:07:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:07:25,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:07:26,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:07:26,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750025049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:26,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:07:26,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:07:26,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030495669] [2021-11-25 19:07:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:26,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:07:26,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:07:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:26,086 INFO L87 Difference]: Start difference. First operand 2027 states and 3860 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:26,672 INFO L93 Difference]: Finished difference Result 2782 states and 5049 transitions. [2021-11-25 19:07:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:07:26,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 19:07:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:26,702 INFO L225 Difference]: With dead ends: 2782 [2021-11-25 19:07:26,703 INFO L226 Difference]: Without dead ends: 2401 [2021-11-25 19:07:26,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:26,708 INFO L933 BasicCegarLoop]: 3376 mSDtfsCounter, 3533 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 3624 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:26,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3533 Valid, 3624 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:07:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-11-25 19:07:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2395. [2021-11-25 19:07:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2273 states have (on average 1.86229652441707) internal successors, (4233), 2278 states have internal predecessors, (4233), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-25 19:07:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 4423 transitions. [2021-11-25 19:07:26,859 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 4423 transitions. Word has length 144 [2021-11-25 19:07:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:26,860 INFO L470 AbstractCegarLoop]: Abstraction has 2395 states and 4423 transitions. [2021-11-25 19:07:26,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 4423 transitions. [2021-11-25 19:07:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:07:26,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:26,866 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:26,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:07:27,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:27,094 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash 353351058, now seen corresponding path program 1 times [2021-11-25 19:07:27,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:27,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524272004] [2021-11-25 19:07:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:27,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:07:27,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:27,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524272004] [2021-11-25 19:07:27,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524272004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:27,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234017960] [2021-11-25 19:07:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:27,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:27,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:27,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:27,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:07:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:27,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:07:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:07:27,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:07:27,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234017960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:27,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:07:27,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:07:27,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751034305] [2021-11-25 19:07:27,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:27,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:07:27,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:27,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:07:27,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:27,893 INFO L87 Difference]: Start difference. First operand 2395 states and 4423 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:28,492 INFO L93 Difference]: Finished difference Result 3880 states and 6758 transitions. [2021-11-25 19:07:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:07:28,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 19:07:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:28,518 INFO L225 Difference]: With dead ends: 3880 [2021-11-25 19:07:28,518 INFO L226 Difference]: Without dead ends: 3131 [2021-11-25 19:07:28,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:28,524 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3527 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:28,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3527 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:07:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-25 19:07:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3123. [2021-11-25 19:07:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 2891 states have (on average 1.7886544448287789) internal successors, (5171), 2898 states have internal predecessors, (5171), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2021-11-25 19:07:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5533 transitions. [2021-11-25 19:07:28,686 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5533 transitions. Word has length 144 [2021-11-25 19:07:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:28,687 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 5533 transitions. [2021-11-25 19:07:28,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5533 transitions. [2021-11-25 19:07:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:07:28,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:28,694 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:28,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:28,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:28,922 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:28,923 INFO L85 PathProgramCache]: Analyzing trace with hash -249714608, now seen corresponding path program 1 times [2021-11-25 19:07:28,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:28,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529328563] [2021-11-25 19:07:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:28,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:07:29,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529328563] [2021-11-25 19:07:29,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529328563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:29,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693748721] [2021-11-25 19:07:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:29,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:29,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:29,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:29,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:07:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:29,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:07:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-25 19:07:29,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:07:29,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693748721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:29,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:07:29,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:07:29,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941367125] [2021-11-25 19:07:29,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:29,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:07:29,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:07:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:29,606 INFO L87 Difference]: Start difference. First operand 3123 states and 5533 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:30,267 INFO L93 Difference]: Finished difference Result 6052 states and 10126 transitions. [2021-11-25 19:07:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:07:30,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 19:07:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:30,305 INFO L225 Difference]: With dead ends: 6052 [2021-11-25 19:07:30,305 INFO L226 Difference]: Without dead ends: 4575 [2021-11-25 19:07:30,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:30,316 INFO L933 BasicCegarLoop]: 3374 mSDtfsCounter, 3551 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3551 SdHoareTripleChecker+Valid, 3622 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:30,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3551 Valid, 3622 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:07:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2021-11-25 19:07:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4563. [2021-11-25 19:07:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4115 states have (on average 1.7066828675577157) internal successors, (7023), 4126 states have internal predecessors, (7023), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2021-11-25 19:07:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 7721 transitions. [2021-11-25 19:07:30,591 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 7721 transitions. Word has length 144 [2021-11-25 19:07:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:30,592 INFO L470 AbstractCegarLoop]: Abstraction has 4563 states and 7721 transitions. [2021-11-25 19:07:30,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 7721 transitions. [2021-11-25 19:07:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:07:30,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:30,604 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:30,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:30,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:30,830 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2060370190, now seen corresponding path program 1 times [2021-11-25 19:07:30,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:30,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071797951] [2021-11-25 19:07:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:30,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:07:30,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:30,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071797951] [2021-11-25 19:07:30,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071797951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:30,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717494015] [2021-11-25 19:07:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:30,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:30,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:30,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:30,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:07:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:31,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:07:31,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:07:31,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:07:31,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717494015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:31,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:07:31,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:07:31,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603898552] [2021-11-25 19:07:31,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:31,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:07:31,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:31,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:07:31,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:31,633 INFO L87 Difference]: Start difference. First operand 4563 states and 7721 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:32,296 INFO L93 Difference]: Finished difference Result 10348 states and 16762 transitions. [2021-11-25 19:07:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:07:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 19:07:32,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:32,359 INFO L225 Difference]: With dead ends: 10348 [2021-11-25 19:07:32,359 INFO L226 Difference]: Without dead ends: 7431 [2021-11-25 19:07:32,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:32,378 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3545 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3545 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:32,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3545 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:07:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2021-11-25 19:07:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7411. [2021-11-25 19:07:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 6539 states have (on average 1.6331243309374521) internal successors, (10679), 6558 states have internal predecessors, (10679), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2021-11-25 19:07:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 12033 transitions. [2021-11-25 19:07:32,733 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 12033 transitions. Word has length 144 [2021-11-25 19:07:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:32,733 INFO L470 AbstractCegarLoop]: Abstraction has 7411 states and 12033 transitions. [2021-11-25 19:07:32,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 12033 transitions. [2021-11-25 19:07:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:07:32,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:32,751 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:32,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:32,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:32,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash 41467980, now seen corresponding path program 1 times [2021-11-25 19:07:32,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:32,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335080068] [2021-11-25 19:07:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:32,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:07:33,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335080068] [2021-11-25 19:07:33,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335080068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398409898] [2021-11-25 19:07:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:33,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:33,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:33,064 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:33,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:07:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:33,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:07:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 19:07:33,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:07:33,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398409898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:33,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:07:33,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:07:33,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046563190] [2021-11-25 19:07:33,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:33,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:07:33,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:33,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:07:33,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:33,551 INFO L87 Difference]: Start difference. First operand 7411 states and 12033 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:34,386 INFO L93 Difference]: Finished difference Result 18844 states and 29834 transitions. [2021-11-25 19:07:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:07:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 19:07:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:34,466 INFO L225 Difference]: With dead ends: 18844 [2021-11-25 19:07:34,466 INFO L226 Difference]: Without dead ends: 13079 [2021-11-25 19:07:34,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:34,499 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3554 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3554 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:34,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3554 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:07:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13079 states. [2021-11-25 19:07:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13079 to 13043. [2021-11-25 19:07:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13043 states, 11339 states have (on average 1.578181497486551) internal successors, (17895), 11374 states have internal predecessors, (17895), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2021-11-25 19:07:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13043 states to 13043 states and 20529 transitions. [2021-11-25 19:07:35,227 INFO L78 Accepts]: Start accepts. Automaton has 13043 states and 20529 transitions. Word has length 144 [2021-11-25 19:07:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:35,227 INFO L470 AbstractCegarLoop]: Abstraction has 13043 states and 20529 transitions. [2021-11-25 19:07:35,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 13043 states and 20529 transitions. [2021-11-25 19:07:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:07:35,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:35,257 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:35,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:35,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:07:35,470 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:35,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1516701390, now seen corresponding path program 1 times [2021-11-25 19:07:35,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:35,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834865479] [2021-11-25 19:07:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:35,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:07:35,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:35,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834865479] [2021-11-25 19:07:35,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834865479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:35,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417366116] [2021-11-25 19:07:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:35,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:35,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:35,586 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:35,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:07:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:07:35,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:07:36,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:07:36,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417366116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:36,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:07:36,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:07:36,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606489213] [2021-11-25 19:07:36,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:36,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:07:36,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:07:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:36,110 INFO L87 Difference]: Start difference. First operand 13043 states and 20529 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:37,166 INFO L93 Difference]: Finished difference Result 35644 states and 55578 transitions. [2021-11-25 19:07:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:07:37,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 19:07:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:37,301 INFO L225 Difference]: With dead ends: 35644 [2021-11-25 19:07:37,301 INFO L226 Difference]: Without dead ends: 24247 [2021-11-25 19:07:37,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:37,363 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3524 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3524 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:37,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3524 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:07:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24247 states. [2021-11-25 19:07:38,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24247 to 24179. [2021-11-25 19:07:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24179 states, 20843 states have (on average 1.5417646212157559) internal successors, (32135), 20910 states have internal predecessors, (32135), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2021-11-25 19:07:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24179 states to 24179 states and 37265 transitions. [2021-11-25 19:07:38,580 INFO L78 Accepts]: Start accepts. Automaton has 24179 states and 37265 transitions. Word has length 144 [2021-11-25 19:07:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:38,581 INFO L470 AbstractCegarLoop]: Abstraction has 24179 states and 37265 transitions. [2021-11-25 19:07:38,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 24179 states and 37265 transitions. [2021-11-25 19:07:38,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:07:38,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:38,640 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:38,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:38,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:38,865 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash 780549328, now seen corresponding path program 1 times [2021-11-25 19:07:38,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:38,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757496310] [2021-11-25 19:07:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:38,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:07:38,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757496310] [2021-11-25 19:07:38,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757496310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:38,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894369202] [2021-11-25 19:07:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:38,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:38,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:39,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:07:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:39,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:07:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 19:07:39,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:07:39,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894369202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:39,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:07:39,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 19:07:39,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639315818] [2021-11-25 19:07:39,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:39,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:07:39,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:07:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:39,526 INFO L87 Difference]: Start difference. First operand 24179 states and 37265 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:41,695 INFO L93 Difference]: Finished difference Result 68860 states and 106266 transitions. [2021-11-25 19:07:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:07:41,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 19:07:41,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:41,921 INFO L225 Difference]: With dead ends: 68860 [2021-11-25 19:07:41,921 INFO L226 Difference]: Without dead ends: 46327 [2021-11-25 19:07:41,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:41,988 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3539 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3539 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:41,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3539 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:07:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46327 states. [2021-11-25 19:07:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46327 to 46195. [2021-11-25 19:07:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46195 states, 39659 states have (on average 1.5187221059532514) internal successors, (60231), 39790 states have internal predecessors, (60231), 4998 states have call successors, (4998), 1537 states have call predecessors, (4998), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2021-11-25 19:07:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46195 states to 46195 states and 70225 transitions. [2021-11-25 19:07:44,016 INFO L78 Accepts]: Start accepts. Automaton has 46195 states and 70225 transitions. Word has length 144 [2021-11-25 19:07:44,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:44,016 INFO L470 AbstractCegarLoop]: Abstraction has 46195 states and 70225 transitions. [2021-11-25 19:07:44,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:07:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 46195 states and 70225 transitions. [2021-11-25 19:07:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 19:07:44,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:44,106 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:44,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:44,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:44,322 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1081606798, now seen corresponding path program 1 times [2021-11-25 19:07:44,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:44,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193900575] [2021-11-25 19:07:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:44,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 19:07:44,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:44,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193900575] [2021-11-25 19:07:44,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193900575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:44,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:07:44,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:07:44,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391139545] [2021-11-25 19:07:44,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:44,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:07:44,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:07:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:07:44,651 INFO L87 Difference]: Start difference. First operand 46195 states and 70225 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 19:07:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:49,379 INFO L93 Difference]: Finished difference Result 158075 states and 238040 transitions. [2021-11-25 19:07:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:07:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2021-11-25 19:07:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:50,424 INFO L225 Difference]: With dead ends: 158075 [2021-11-25 19:07:50,424 INFO L226 Difference]: Without dead ends: 113527 [2021-11-25 19:07:50,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:07:50,554 INFO L933 BasicCegarLoop]: 3345 mSDtfsCounter, 4425 mSDsluCounter, 10594 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4447 SdHoareTripleChecker+Valid, 13168 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:50,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4447 Valid, 13168 Invalid, 1411 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [156 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:07:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113527 states. [2021-11-25 19:07:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113527 to 89203. [2021-11-25 19:07:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89203 states, 76395 states have (on average 1.5038549643301262) internal successors, (114887), 76654 states have internal predecessors, (114887), 9734 states have call successors, (9734), 3073 states have call predecessors, (9734), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2021-11-25 19:07:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89203 states to 89203 states and 134353 transitions. [2021-11-25 19:07:55,454 INFO L78 Accepts]: Start accepts. Automaton has 89203 states and 134353 transitions. Word has length 144 [2021-11-25 19:07:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:55,456 INFO L470 AbstractCegarLoop]: Abstraction has 89203 states and 134353 transitions. [2021-11-25 19:07:55,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 19:07:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 89203 states and 134353 transitions. [2021-11-25 19:07:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-25 19:07:55,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:55,595 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-25 19:07:55,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:07:55,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:55,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:55,596 INFO L85 PathProgramCache]: Analyzing trace with hash 124723034, now seen corresponding path program 1 times [2021-11-25 19:07:55,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:55,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245924102] [2021-11-25 19:07:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:55,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:07:55,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245924102] [2021-11-25 19:07:55,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245924102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561113406] [2021-11-25 19:07:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:55,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:55,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:55,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:55,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:07:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:07:56,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-25 19:07:56,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:07:56,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561113406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:07:56,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:07:56,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:07:56,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276130861] [2021-11-25 19:07:56,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:07:56,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:07:56,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:56,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:07:56,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:07:56,324 INFO L87 Difference]: Start difference. First operand 89203 states and 134353 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 19:08:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:00,676 INFO L93 Difference]: Finished difference Result 157175 states and 240212 transitions. [2021-11-25 19:08:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:08:00,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 167 [2021-11-25 19:08:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:01,438 INFO L225 Difference]: With dead ends: 157175 [2021-11-25 19:08:01,438 INFO L226 Difference]: Without dead ends: 112371 [2021-11-25 19:08:01,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:08:01,628 INFO L933 BasicCegarLoop]: 3452 mSDtfsCounter, 134 mSDsluCounter, 3585 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 6778 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:01,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 6778 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:08:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112371 states. [2021-11-25 19:08:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112371 to 106227. [2021-11-25 19:08:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106227 states, 92907 states have (on average 1.5451903516419645) internal successors, (143559), 93166 states have internal predecessors, (143559), 9990 states have call successors, (9990), 3329 states have call predecessors, (9990), 3328 states have return successors, (9988), 9732 states have call predecessors, (9988), 9988 states have call successors, (9988) [2021-11-25 19:08:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106227 states to 106227 states and 163537 transitions. [2021-11-25 19:08:06,500 INFO L78 Accepts]: Start accepts. Automaton has 106227 states and 163537 transitions. Word has length 167 [2021-11-25 19:08:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:08:06,501 INFO L470 AbstractCegarLoop]: Abstraction has 106227 states and 163537 transitions. [2021-11-25 19:08:06,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 19:08:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 106227 states and 163537 transitions. [2021-11-25 19:08:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-25 19:08:06,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:08:06,796 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-25 19:08:06,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:08:07,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:08:07,010 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:08:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:08:07,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1607564969, now seen corresponding path program 1 times [2021-11-25 19:08:07,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:08:07,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566607806] [2021-11-25 19:08:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:07,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:08:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 19:08:07,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:08:07,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566607806] [2021-11-25 19:08:07,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566607806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:08:07,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051471505] [2021-11-25 19:08:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:08:07,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:08:07,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:08:07,666 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:08:07,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0390a827-1fe0-4d90-8412-654d0c3bae8f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:08:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:08:08,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:08:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:08:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-25 19:08:08,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:08:08,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051471505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:08:08,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:08:08,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2021-11-25 19:08:08,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656972209] [2021-11-25 19:08:08,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:08:08,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:08:08,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:08:08,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:08:08,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:08:08,420 INFO L87 Difference]: Start difference. First operand 106227 states and 163537 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 19:08:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:08:15,503 INFO L93 Difference]: Finished difference Result 313852 states and 487642 transitions. [2021-11-25 19:08:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:08:15,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 220 [2021-11-25 19:08:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:08:16,355 INFO L225 Difference]: With dead ends: 313852 [2021-11-25 19:08:16,355 INFO L226 Difference]: Without dead ends: 209271 [2021-11-25 19:08:16,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:08:16,610 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3475 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:08:16,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3475 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:08:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209271 states.