./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw --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 9aa17fef9ac46070b7bee497b29e6b2bfca553e9cde26e85393d7783524fde38 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 05:38:28,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:38:28,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:38:28,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:38:28,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:38:28,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:38:28,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:38:28,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:38:28,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:38:28,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:38:28,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:38:28,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:38:28,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:38:28,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:38:28,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:38:28,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:38:28,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:38:28,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:38:28,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:38:28,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:38:28,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:38:28,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:38:28,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:38:28,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:38:28,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:38:28,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:38:28,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:38:28,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:38:28,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:38:28,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:38:28,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:38:28,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:38:28,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:38:28,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:38:28,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:38:28,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:38:28,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:38:28,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:38:28,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:38:28,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:38:28,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:38:28,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:38:28,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:38:28,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:38:28,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:38:28,767 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:38:28,767 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:38:28,768 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:38:28,768 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:38:28,768 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:38:28,769 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:38:28,769 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:38:28,769 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:38:28,769 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:38:28,770 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:38:28,770 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:38:28,770 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:38:28,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:38:28,771 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:38:28,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:38:28,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:38:28,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:38:28,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:38:28,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:38:28,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:38:28,773 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:38:28,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:38:28,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:38:28,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:38:28,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:38:28,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:38:28,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:38:28,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:38:28,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:38:28,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:38:28,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:38:28,777 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:38:28,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:38:28,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:38:28,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:38:28,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:38:28,778 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_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aa17fef9ac46070b7bee497b29e6b2bfca553e9cde26e85393d7783524fde38 [2021-10-20 05:38:29,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:38:29,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:38:29,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:38:29,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:38:29,140 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:38:29,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c [2021-10-20 05:38:29,217 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/data/0b838b171/d8635133737c482c8204a39ea89e0636/FLAG53ceabbd4 [2021-10-20 05:38:29,805 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:38:29,807 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c [2021-10-20 05:38:29,815 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/data/0b838b171/d8635133737c482c8204a39ea89e0636/FLAG53ceabbd4 [2021-10-20 05:38:30,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/data/0b838b171/d8635133737c482c8204a39ea89e0636 [2021-10-20 05:38:30,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:38:30,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:38:30,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:38:30,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:38:30,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:38:30,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f42f63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30, skipping insertion in model container [2021-10-20 05:38:30,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:38:30,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:38:30,441 WARN L228 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_0398dd96-99a2-4cc4-9c48-dea74be85a7b/sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c[2529,2542] [2021-10-20 05:38:30,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:38:30,463 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:38:30,511 WARN L228 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_0398dd96-99a2-4cc4-9c48-dea74be85a7b/sv-benchmarks/c/weaver/parallel-ticket-3.wvr.c[2529,2542] [2021-10-20 05:38:30,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:38:30,540 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:38:30,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30 WrapperNode [2021-10-20 05:38:30,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:38:30,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:38:30,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:38:30,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:38:30,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:38:30,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:38:30,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:38:30,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:38:30,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:38:30,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:38:30,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:38:30,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:38:30,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (1/1) ... [2021-10-20 05:38:30,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:38:30,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:38:30,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:38:30,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:38:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-20 05:38:30,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-20 05:38:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-20 05:38:30,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-20 05:38:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-20 05:38:30,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-20 05:38:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:38:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:38:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-20 05:38:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-20 05:38:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-20 05:38:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:38:30,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:38:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-20 05:38:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 05:38:30,753 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-20 05:38:31,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:38:31,143 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-20 05:38:31,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:38:31 BoogieIcfgContainer [2021-10-20 05:38:31,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:38:31,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:38:31,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:38:31,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:38:31,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:38:30" (1/3) ... [2021-10-20 05:38:31,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41533292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:38:31, skipping insertion in model container [2021-10-20 05:38:31,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:38:30" (2/3) ... [2021-10-20 05:38:31,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41533292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:38:31, skipping insertion in model container [2021-10-20 05:38:31,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:38:31" (3/3) ... [2021-10-20 05:38:31,155 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-ticket-3.wvr.c [2021-10-20 05:38:31,160 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-20 05:38:31,161 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:38:31,161 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:38:31,161 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-20 05:38:31,229 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,229 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,229 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,230 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,230 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,230 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,230 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,231 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,231 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,231 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,231 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,231 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,232 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,232 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,232 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,233 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,233 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,233 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,233 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,233 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,234 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,234 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,234 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,234 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,235 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,236 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,236 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,237 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,237 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,237 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,237 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,238 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,238 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,238 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,238 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,239 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,239 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,243 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,244 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,249 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,250 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,250 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,250 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,250 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,251 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,251 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,251 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,252 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,252 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,253 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,255 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,255 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,255 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,256 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,256 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,257 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,257 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,267 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,268 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,268 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,268 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,269 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,269 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,270 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,270 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,270 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,271 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,271 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,271 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,271 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,272 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,272 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,276 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,276 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,276 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,277 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,277 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,277 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,280 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,281 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,281 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,281 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,282 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,282 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,285 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,285 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,285 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,286 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,286 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,286 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-20 05:38:31,300 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-20 05:38:31,361 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:38:31,369 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 [2021-10-20 05:38:31,370 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-20 05:38:31,394 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-20 05:38:31,408 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 132 transitions, 288 flow [2021-10-20 05:38:31,412 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 132 transitions, 288 flow [2021-10-20 05:38:31,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 137 places, 132 transitions, 288 flow [2021-10-20 05:38:31,504 INFO L129 PetriNetUnfolder]: 5/129 cut-off events. [2021-10-20 05:38:31,504 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-20 05:38:31,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 129 events. 5/129 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 98 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2021-10-20 05:38:31,515 INFO L116 LiptonReduction]: Number of co-enabled transitions 2032 [2021-10-20 05:38:37,347 INFO L131 LiptonReduction]: Checked pairs total: 6055 [2021-10-20 05:38:37,348 INFO L133 LiptonReduction]: Total number of compositions: 113 [2021-10-20 05:38:37,357 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 34 transitions, 92 flow [2021-10-20 05:38:37,425 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 690 states, 689 states have (on average 3.036284470246734) internal successors, (2092), 689 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 690 states, 689 states have (on average 3.036284470246734) internal successors, (2092), 689 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-20 05:38:37,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:37,455 INFO L512 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] [2021-10-20 05:38:37,456 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1454676914, now seen corresponding path program 1 times [2021-10-20 05:38:37,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:37,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326370050] [2021-10-20 05:38:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:37,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:37,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:37,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326370050] [2021-10-20 05:38:37,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326370050] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:37,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:37,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:38:37,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655156516] [2021-10-20 05:38:37,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-20 05:38:37,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:37,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-20 05:38:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:38:37,751 INFO L87 Difference]: Start difference. First operand has 690 states, 689 states have (on average 3.036284470246734) internal successors, (2092), 689 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:37,821 INFO L93 Difference]: Finished difference Result 690 states and 1994 transitions. [2021-10-20 05:38:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-20 05:38:37,823 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-20 05:38:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:37,862 INFO L225 Difference]: With dead ends: 690 [2021-10-20 05:38:37,862 INFO L226 Difference]: Without dead ends: 690 [2021-10-20 05:38:37,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-20 05:38:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-10-20 05:38:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2021-10-20 05:38:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.8940493468795356) internal successors, (1994), 689 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1994 transitions. [2021-10-20 05:38:37,990 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1994 transitions. Word has length 25 [2021-10-20 05:38:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:37,992 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1994 transitions. [2021-10-20 05:38:37,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1994 transitions. [2021-10-20 05:38:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:37,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:37,997 INFO L512 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] [2021-10-20 05:38:37,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:38:37,998 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash 954248746, now seen corresponding path program 1 times [2021-10-20 05:38:38,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:38,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437948736] [2021-10-20 05:38:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:38,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:38,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:38,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437948736] [2021-10-20 05:38:38,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437948736] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:38,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:38,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-20 05:38:38,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678506009] [2021-10-20 05:38:38,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-20 05:38:38,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-20 05:38:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:38:38,395 INFO L87 Difference]: Start difference. First operand 690 states and 1994 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:38,635 INFO L93 Difference]: Finished difference Result 1026 states and 3118 transitions. [2021-10-20 05:38:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 05:38:38,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:38,652 INFO L225 Difference]: With dead ends: 1026 [2021-10-20 05:38:38,652 INFO L226 Difference]: Without dead ends: 1026 [2021-10-20 05:38:38,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-10-20 05:38:38,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 786. [2021-10-20 05:38:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.927388535031847) internal successors, (2298), 785 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2298 transitions. [2021-10-20 05:38:38,739 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2298 transitions. Word has length 29 [2021-10-20 05:38:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:38,741 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2298 transitions. [2021-10-20 05:38:38,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2298 transitions. [2021-10-20 05:38:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:38,766 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:38,767 INFO L512 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] [2021-10-20 05:38:38,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:38:38,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:38,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1386473238, now seen corresponding path program 2 times [2021-10-20 05:38:38,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:38,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443466162] [2021-10-20 05:38:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:38,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:39,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:39,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443466162] [2021-10-20 05:38:39,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443466162] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:39,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:39,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-20 05:38:39,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303041889] [2021-10-20 05:38:39,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-20 05:38:39,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:39,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-20 05:38:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:38:39,051 INFO L87 Difference]: Start difference. First operand 786 states and 2298 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:39,272 INFO L93 Difference]: Finished difference Result 1044 states and 3143 transitions. [2021-10-20 05:38:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-20 05:38:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:39,284 INFO L225 Difference]: With dead ends: 1044 [2021-10-20 05:38:39,284 INFO L226 Difference]: Without dead ends: 994 [2021-10-20 05:38:39,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-10-20 05:38:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 754. [2021-10-20 05:38:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.903054448871182) internal successors, (2186), 753 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:39,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2186 transitions. [2021-10-20 05:38:39,330 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2186 transitions. Word has length 29 [2021-10-20 05:38:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:39,331 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2186 transitions. [2021-10-20 05:38:39,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2186 transitions. [2021-10-20 05:38:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:39,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:39,337 INFO L512 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] [2021-10-20 05:38:39,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:38:39,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:39,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:39,339 INFO L82 PathProgramCache]: Analyzing trace with hash -338575992, now seen corresponding path program 3 times [2021-10-20 05:38:39,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:39,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365039720] [2021-10-20 05:38:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:39,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:39,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:39,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365039720] [2021-10-20 05:38:39,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365039720] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:39,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:39,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-20 05:38:39,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930742751] [2021-10-20 05:38:39,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 05:38:39,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 05:38:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:38:39,558 INFO L87 Difference]: Start difference. First operand 754 states and 2186 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:39,713 INFO L93 Difference]: Finished difference Result 882 states and 2574 transitions. [2021-10-20 05:38:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 05:38:39,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:39,724 INFO L225 Difference]: With dead ends: 882 [2021-10-20 05:38:39,724 INFO L226 Difference]: Without dead ends: 882 [2021-10-20 05:38:39,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:38:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-10-20 05:38:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2021-10-20 05:38:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.9216799091940975) internal successors, (2574), 881 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2574 transitions. [2021-10-20 05:38:39,806 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2574 transitions. Word has length 29 [2021-10-20 05:38:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:39,807 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2574 transitions. [2021-10-20 05:38:39,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2574 transitions. [2021-10-20 05:38:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:39,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:39,813 INFO L512 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] [2021-10-20 05:38:39,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:38:39,813 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:39,815 INFO L82 PathProgramCache]: Analyzing trace with hash -224736078, now seen corresponding path program 4 times [2021-10-20 05:38:39,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:39,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313975611] [2021-10-20 05:38:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:39,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:39,999 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:40,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313975611] [2021-10-20 05:38:40,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313975611] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:40,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:40,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-20 05:38:40,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105398218] [2021-10-20 05:38:40,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-20 05:38:40,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-20 05:38:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:38:40,002 INFO L87 Difference]: Start difference. First operand 882 states and 2574 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:40,174 INFO L93 Difference]: Finished difference Result 916 states and 2625 transitions. [2021-10-20 05:38:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 05:38:40,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:40,184 INFO L225 Difference]: With dead ends: 916 [2021-10-20 05:38:40,184 INFO L226 Difference]: Without dead ends: 826 [2021-10-20 05:38:40,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-10-20 05:38:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2021-10-20 05:38:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.892121212121212) internal successors, (2386), 825 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2386 transitions. [2021-10-20 05:38:40,228 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2386 transitions. Word has length 29 [2021-10-20 05:38:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:40,229 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2386 transitions. [2021-10-20 05:38:40,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2386 transitions. [2021-10-20 05:38:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:40,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:40,235 INFO L512 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] [2021-10-20 05:38:40,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 05:38:40,236 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:40,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1874715464, now seen corresponding path program 5 times [2021-10-20 05:38:40,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:40,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210453635] [2021-10-20 05:38:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:40,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:40,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:40,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210453635] [2021-10-20 05:38:40,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210453635] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:40,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:40,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:40,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488014681] [2021-10-20 05:38:40,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:40,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:40,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:40,423 INFO L87 Difference]: Start difference. First operand 826 states and 2386 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:40,675 INFO L93 Difference]: Finished difference Result 786 states and 2199 transitions. [2021-10-20 05:38:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-20 05:38:40,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:40,685 INFO L225 Difference]: With dead ends: 786 [2021-10-20 05:38:40,685 INFO L226 Difference]: Without dead ends: 740 [2021-10-20 05:38:40,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-20 05:38:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-10-20 05:38:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 738. [2021-10-20 05:38:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.8303934871099052) internal successors, (2086), 737 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2086 transitions. [2021-10-20 05:38:40,730 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2086 transitions. Word has length 29 [2021-10-20 05:38:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:40,731 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 2086 transitions. [2021-10-20 05:38:40,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2086 transitions. [2021-10-20 05:38:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:40,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:40,735 INFO L512 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] [2021-10-20 05:38:40,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-20 05:38:40,735 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1904211004, now seen corresponding path program 6 times [2021-10-20 05:38:40,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:40,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910055123] [2021-10-20 05:38:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:40,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:40,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:40,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910055123] [2021-10-20 05:38:40,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910055123] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:40,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:40,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:38:40,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337850020] [2021-10-20 05:38:40,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 05:38:40,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:40,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 05:38:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:38:40,972 INFO L87 Difference]: Start difference. First operand 738 states and 2086 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:41,093 INFO L93 Difference]: Finished difference Result 1045 states and 2911 transitions. [2021-10-20 05:38:41,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 05:38:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:41,102 INFO L225 Difference]: With dead ends: 1045 [2021-10-20 05:38:41,102 INFO L226 Difference]: Without dead ends: 710 [2021-10-20 05:38:41,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:38:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-10-20 05:38:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 710. [2021-10-20 05:38:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.757404795486601) internal successors, (1955), 709 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1955 transitions. [2021-10-20 05:38:41,137 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1955 transitions. Word has length 29 [2021-10-20 05:38:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:41,138 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1955 transitions. [2021-10-20 05:38:41,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1955 transitions. [2021-10-20 05:38:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:41,141 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:41,142 INFO L512 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] [2021-10-20 05:38:41,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-20 05:38:41,142 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:41,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:41,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1150274804, now seen corresponding path program 7 times [2021-10-20 05:38:41,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:41,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260848985] [2021-10-20 05:38:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:41,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:41,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:41,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260848985] [2021-10-20 05:38:41,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260848985] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:41,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:41,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:41,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404670012] [2021-10-20 05:38:41,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:41,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:41,281 INFO L87 Difference]: Start difference. First operand 710 states and 1955 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:41,651 INFO L93 Difference]: Finished difference Result 978 states and 2534 transitions. [2021-10-20 05:38:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-20 05:38:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:41,661 INFO L225 Difference]: With dead ends: 978 [2021-10-20 05:38:41,661 INFO L226 Difference]: Without dead ends: 924 [2021-10-20 05:38:41,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-10-20 05:38:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-10-20 05:38:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 744. [2021-10-20 05:38:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.72678331090175) internal successors, (2026), 743 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2026 transitions. [2021-10-20 05:38:41,702 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2026 transitions. Word has length 29 [2021-10-20 05:38:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:41,703 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2026 transitions. [2021-10-20 05:38:41,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2026 transitions. [2021-10-20 05:38:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:41,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:41,707 INFO L512 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] [2021-10-20 05:38:41,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-20 05:38:41,708 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:41,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1175131616, now seen corresponding path program 8 times [2021-10-20 05:38:41,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:41,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015519569] [2021-10-20 05:38:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:41,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:41,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:41,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015519569] [2021-10-20 05:38:41,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015519569] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:41,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:41,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:41,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531465648] [2021-10-20 05:38:41,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:41,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:41,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:41,868 INFO L87 Difference]: Start difference. First operand 744 states and 2026 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:42,085 INFO L93 Difference]: Finished difference Result 760 states and 2053 transitions. [2021-10-20 05:38:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-20 05:38:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:42,094 INFO L225 Difference]: With dead ends: 760 [2021-10-20 05:38:42,094 INFO L226 Difference]: Without dead ends: 742 [2021-10-20 05:38:42,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-10-20 05:38:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-10-20 05:38:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 736. [2021-10-20 05:38:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.7319727891156464) internal successors, (2008), 735 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2008 transitions. [2021-10-20 05:38:42,130 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2008 transitions. Word has length 29 [2021-10-20 05:38:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:42,132 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2008 transitions. [2021-10-20 05:38:42,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2008 transitions. [2021-10-20 05:38:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:42,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:42,137 INFO L512 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] [2021-10-20 05:38:42,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-20 05:38:42,137 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:42,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:42,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1778046766, now seen corresponding path program 9 times [2021-10-20 05:38:42,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:42,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92731594] [2021-10-20 05:38:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:42,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:42,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:42,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92731594] [2021-10-20 05:38:42,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92731594] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:42,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:42,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:42,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313217513] [2021-10-20 05:38:42,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:42,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:42,337 INFO L87 Difference]: Start difference. First operand 736 states and 2008 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:42,496 INFO L93 Difference]: Finished difference Result 752 states and 2034 transitions. [2021-10-20 05:38:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 05:38:42,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:42,505 INFO L225 Difference]: With dead ends: 752 [2021-10-20 05:38:42,506 INFO L226 Difference]: Without dead ends: 732 [2021-10-20 05:38:42,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-20 05:38:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-10-20 05:38:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 730. [2021-10-20 05:38:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.7338820301783264) internal successors, (1993), 729 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1993 transitions. [2021-10-20 05:38:42,552 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1993 transitions. Word has length 29 [2021-10-20 05:38:42,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:42,553 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1993 transitions. [2021-10-20 05:38:42,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1993 transitions. [2021-10-20 05:38:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:42,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:42,556 INFO L512 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] [2021-10-20 05:38:42,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-20 05:38:42,557 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:42,558 INFO L82 PathProgramCache]: Analyzing trace with hash 361912820, now seen corresponding path program 10 times [2021-10-20 05:38:42,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:42,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660854131] [2021-10-20 05:38:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:42,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:42,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:42,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660854131] [2021-10-20 05:38:42,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660854131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:42,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:42,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:42,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428504962] [2021-10-20 05:38:42,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:42,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:42,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:42,704 INFO L87 Difference]: Start difference. First operand 730 states and 1993 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:43,128 INFO L93 Difference]: Finished difference Result 808 states and 1931 transitions. [2021-10-20 05:38:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-20 05:38:43,128 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:43,134 INFO L225 Difference]: With dead ends: 808 [2021-10-20 05:38:43,134 INFO L226 Difference]: Without dead ends: 656 [2021-10-20 05:38:43,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-10-20 05:38:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-10-20 05:38:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 578. [2021-10-20 05:38:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.4471403812824954) internal successors, (1412), 577 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1412 transitions. [2021-10-20 05:38:43,161 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1412 transitions. Word has length 29 [2021-10-20 05:38:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:43,161 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1412 transitions. [2021-10-20 05:38:43,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1412 transitions. [2021-10-20 05:38:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:43,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:43,165 INFO L512 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] [2021-10-20 05:38:43,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-20 05:38:43,165 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:43,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1500886082, now seen corresponding path program 11 times [2021-10-20 05:38:43,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:43,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561937395] [2021-10-20 05:38:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:43,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:43,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:43,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561937395] [2021-10-20 05:38:43,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561937395] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:43,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:43,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:43,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090719625] [2021-10-20 05:38:43,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:43,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:43,300 INFO L87 Difference]: Start difference. First operand 578 states and 1412 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:43,462 INFO L93 Difference]: Finished difference Result 592 states and 1435 transitions. [2021-10-20 05:38:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 05:38:43,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:43,468 INFO L225 Difference]: With dead ends: 592 [2021-10-20 05:38:43,468 INFO L226 Difference]: Without dead ends: 562 [2021-10-20 05:38:43,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-20 05:38:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-10-20 05:38:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-10-20 05:38:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.449197860962567) internal successors, (1374), 561 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1374 transitions. [2021-10-20 05:38:43,492 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1374 transitions. Word has length 29 [2021-10-20 05:38:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:43,493 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1374 transitions. [2021-10-20 05:38:43,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1374 transitions. [2021-10-20 05:38:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:43,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:43,495 INFO L512 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] [2021-10-20 05:38:43,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-20 05:38:43,496 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:43,496 INFO L82 PathProgramCache]: Analyzing trace with hash -379621264, now seen corresponding path program 12 times [2021-10-20 05:38:43,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:43,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515094421] [2021-10-20 05:38:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:43,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:43,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:43,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515094421] [2021-10-20 05:38:43,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515094421] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:43,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:43,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:43,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934848925] [2021-10-20 05:38:43,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:43,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:43,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:43,626 INFO L87 Difference]: Start difference. First operand 562 states and 1374 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:43,846 INFO L93 Difference]: Finished difference Result 662 states and 1571 transitions. [2021-10-20 05:38:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-20 05:38:43,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:43,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:43,852 INFO L225 Difference]: With dead ends: 662 [2021-10-20 05:38:43,853 INFO L226 Difference]: Without dead ends: 650 [2021-10-20 05:38:43,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-20 05:38:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-10-20 05:38:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 562. [2021-10-20 05:38:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.445632798573975) internal successors, (1372), 561 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1372 transitions. [2021-10-20 05:38:43,880 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1372 transitions. Word has length 29 [2021-10-20 05:38:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:43,881 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1372 transitions. [2021-10-20 05:38:43,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1372 transitions. [2021-10-20 05:38:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:43,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:43,884 INFO L512 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] [2021-10-20 05:38:43,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-20 05:38:43,884 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1508034450, now seen corresponding path program 13 times [2021-10-20 05:38:43,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:43,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715753916] [2021-10-20 05:38:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:43,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:43,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:43,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715753916] [2021-10-20 05:38:43,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715753916] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:43,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:43,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:43,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748104328] [2021-10-20 05:38:43,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:43,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:44,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:44,001 INFO L87 Difference]: Start difference. First operand 562 states and 1372 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:44,250 INFO L93 Difference]: Finished difference Result 662 states and 1569 transitions. [2021-10-20 05:38:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-20 05:38:44,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:44,256 INFO L225 Difference]: With dead ends: 662 [2021-10-20 05:38:44,257 INFO L226 Difference]: Without dead ends: 634 [2021-10-20 05:38:44,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-10-20 05:38:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-10-20 05:38:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 558. [2021-10-20 05:38:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 2.443447037701975) internal successors, (1361), 557 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1361 transitions. [2021-10-20 05:38:44,283 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1361 transitions. Word has length 29 [2021-10-20 05:38:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:44,284 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1361 transitions. [2021-10-20 05:38:44,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1361 transitions. [2021-10-20 05:38:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:44,287 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:44,287 INFO L512 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] [2021-10-20 05:38:44,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-20 05:38:44,288 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:44,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2003154918, now seen corresponding path program 14 times [2021-10-20 05:38:44,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:44,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741624996] [2021-10-20 05:38:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:44,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:44,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:44,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741624996] [2021-10-20 05:38:44,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741624996] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:44,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:44,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:44,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347548007] [2021-10-20 05:38:44,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:44,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:44,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:44,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:44,446 INFO L87 Difference]: Start difference. First operand 558 states and 1361 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:44,725 INFO L93 Difference]: Finished difference Result 690 states and 1644 transitions. [2021-10-20 05:38:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-20 05:38:44,726 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:44,732 INFO L225 Difference]: With dead ends: 690 [2021-10-20 05:38:44,732 INFO L226 Difference]: Without dead ends: 678 [2021-10-20 05:38:44,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-20 05:38:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-10-20 05:38:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 554. [2021-10-20 05:38:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.4430379746835444) internal successors, (1351), 553 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1351 transitions. [2021-10-20 05:38:44,766 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1351 transitions. Word has length 29 [2021-10-20 05:38:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:44,767 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1351 transitions. [2021-10-20 05:38:44,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1351 transitions. [2021-10-20 05:38:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:44,769 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:44,770 INFO L512 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] [2021-10-20 05:38:44,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-20 05:38:44,770 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:44,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2028011730, now seen corresponding path program 15 times [2021-10-20 05:38:44,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:44,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349104124] [2021-10-20 05:38:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:44,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:44,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:44,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349104124] [2021-10-20 05:38:44,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349104124] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:44,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:44,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:44,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916668537] [2021-10-20 05:38:44,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:44,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:44,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:44,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:44,884 INFO L87 Difference]: Start difference. First operand 554 states and 1351 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:45,194 INFO L93 Difference]: Finished difference Result 688 states and 1637 transitions. [2021-10-20 05:38:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-20 05:38:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:45,201 INFO L225 Difference]: With dead ends: 688 [2021-10-20 05:38:45,201 INFO L226 Difference]: Without dead ends: 676 [2021-10-20 05:38:45,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-10-20 05:38:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-10-20 05:38:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 552. [2021-10-20 05:38:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.442831215970962) internal successors, (1346), 551 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1346 transitions. [2021-10-20 05:38:45,223 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1346 transitions. Word has length 29 [2021-10-20 05:38:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:45,223 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1346 transitions. [2021-10-20 05:38:45,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1346 transitions. [2021-10-20 05:38:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:45,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:45,226 INFO L512 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] [2021-10-20 05:38:45,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-20 05:38:45,227 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:45,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:45,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1368350754, now seen corresponding path program 16 times [2021-10-20 05:38:45,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:45,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168408184] [2021-10-20 05:38:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:45,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:45,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:45,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168408184] [2021-10-20 05:38:45,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168408184] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:45,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:45,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:45,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289647510] [2021-10-20 05:38:45,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:45,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:45,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:45,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:45,341 INFO L87 Difference]: Start difference. First operand 552 states and 1346 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:45,638 INFO L93 Difference]: Finished difference Result 688 states and 1637 transitions. [2021-10-20 05:38:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-20 05:38:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:45,645 INFO L225 Difference]: With dead ends: 688 [2021-10-20 05:38:45,645 INFO L226 Difference]: Without dead ends: 664 [2021-10-20 05:38:45,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-20 05:38:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-10-20 05:38:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 540. [2021-10-20 05:38:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.4471243042671613) internal successors, (1319), 539 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1319 transitions. [2021-10-20 05:38:45,667 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1319 transitions. Word has length 29 [2021-10-20 05:38:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:45,668 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1319 transitions. [2021-10-20 05:38:45,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1319 transitions. [2021-10-20 05:38:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:45,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:45,671 INFO L512 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] [2021-10-20 05:38:45,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-20 05:38:45,671 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1063817640, now seen corresponding path program 17 times [2021-10-20 05:38:45,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:45,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705697412] [2021-10-20 05:38:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:45,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:45,803 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:45,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705697412] [2021-10-20 05:38:45,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705697412] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:45,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:45,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:45,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965116409] [2021-10-20 05:38:45,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:45,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:45,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:45,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:45,806 INFO L87 Difference]: Start difference. First operand 540 states and 1319 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:46,130 INFO L93 Difference]: Finished difference Result 676 states and 1610 transitions. [2021-10-20 05:38:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-20 05:38:46,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:46,137 INFO L225 Difference]: With dead ends: 676 [2021-10-20 05:38:46,137 INFO L226 Difference]: Without dead ends: 642 [2021-10-20 05:38:46,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-10-20 05:38:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-10-20 05:38:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 518. [2021-10-20 05:38:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.473887814313346) internal successors, (1279), 517 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1279 transitions. [2021-10-20 05:38:46,160 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1279 transitions. Word has length 29 [2021-10-20 05:38:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:46,160 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1279 transitions. [2021-10-20 05:38:46,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1279 transitions. [2021-10-20 05:38:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:46,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:46,163 INFO L512 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] [2021-10-20 05:38:46,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-20 05:38:46,163 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1021323362, now seen corresponding path program 18 times [2021-10-20 05:38:46,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:46,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566474556] [2021-10-20 05:38:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:46,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:46,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:46,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566474556] [2021-10-20 05:38:46,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566474556] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:46,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:46,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-20 05:38:46,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589918653] [2021-10-20 05:38:46,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-20 05:38:46,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-20 05:38:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:38:46,267 INFO L87 Difference]: Start difference. First operand 518 states and 1279 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:46,430 INFO L93 Difference]: Finished difference Result 404 states and 936 transitions. [2021-10-20 05:38:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 05:38:46,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:46,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:46,434 INFO L225 Difference]: With dead ends: 404 [2021-10-20 05:38:46,434 INFO L226 Difference]: Without dead ends: 324 [2021-10-20 05:38:46,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-20 05:38:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-20 05:38:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-10-20 05:38:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.3157894736842106) internal successors, (748), 323 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 748 transitions. [2021-10-20 05:38:46,447 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 748 transitions. Word has length 29 [2021-10-20 05:38:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:46,447 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 748 transitions. [2021-10-20 05:38:46,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 748 transitions. [2021-10-20 05:38:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:46,449 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:46,449 INFO L512 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] [2021-10-20 05:38:46,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-20 05:38:46,450 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:46,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:46,450 INFO L82 PathProgramCache]: Analyzing trace with hash 100174420, now seen corresponding path program 19 times [2021-10-20 05:38:46,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:46,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389438568] [2021-10-20 05:38:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:46,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:46,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:46,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389438568] [2021-10-20 05:38:46,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389438568] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:46,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:46,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:46,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519742445] [2021-10-20 05:38:46,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:46,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:46,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:46,621 INFO L87 Difference]: Start difference. First operand 324 states and 748 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:46,837 INFO L93 Difference]: Finished difference Result 342 states and 775 transitions. [2021-10-20 05:38:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-20 05:38:46,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:46,840 INFO L225 Difference]: With dead ends: 342 [2021-10-20 05:38:46,840 INFO L226 Difference]: Without dead ends: 326 [2021-10-20 05:38:46,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-20 05:38:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-10-20 05:38:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2021-10-20 05:38:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.2972136222910216) internal successors, (742), 323 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 742 transitions. [2021-10-20 05:38:46,852 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 742 transitions. Word has length 29 [2021-10-20 05:38:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:46,852 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 742 transitions. [2021-10-20 05:38:46,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 742 transitions. [2021-10-20 05:38:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:46,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:46,854 INFO L512 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] [2021-10-20 05:38:46,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-20 05:38:46,854 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:46,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1871259744, now seen corresponding path program 20 times [2021-10-20 05:38:46,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:46,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594036110] [2021-10-20 05:38:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:46,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:46,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:46,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594036110] [2021-10-20 05:38:46,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594036110] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:46,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:46,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:46,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199194018] [2021-10-20 05:38:46,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:46,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:46,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:46,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:46,986 INFO L87 Difference]: Start difference. First operand 324 states and 742 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:47,242 INFO L93 Difference]: Finished difference Result 396 states and 892 transitions. [2021-10-20 05:38:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-20 05:38:47,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:47,246 INFO L225 Difference]: With dead ends: 396 [2021-10-20 05:38:47,246 INFO L226 Difference]: Without dead ends: 384 [2021-10-20 05:38:47,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-20 05:38:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-20 05:38:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 326. [2021-10-20 05:38:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.292307692307692) internal successors, (745), 325 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 745 transitions. [2021-10-20 05:38:47,260 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 745 transitions. Word has length 29 [2021-10-20 05:38:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:47,262 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 745 transitions. [2021-10-20 05:38:47,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 745 transitions. [2021-10-20 05:38:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:47,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:47,264 INFO L512 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] [2021-10-20 05:38:47,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-20 05:38:47,265 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash -558818706, now seen corresponding path program 21 times [2021-10-20 05:38:47,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:47,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353809238] [2021-10-20 05:38:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:47,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:47,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:47,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353809238] [2021-10-20 05:38:47,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353809238] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:47,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:47,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:47,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626837251] [2021-10-20 05:38:47,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:47,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:47,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:47,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:47,404 INFO L87 Difference]: Start difference. First operand 326 states and 745 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:47,682 INFO L93 Difference]: Finished difference Result 394 states and 885 transitions. [2021-10-20 05:38:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-20 05:38:47,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:47,686 INFO L225 Difference]: With dead ends: 394 [2021-10-20 05:38:47,686 INFO L226 Difference]: Without dead ends: 376 [2021-10-20 05:38:47,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-20 05:38:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-10-20 05:38:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 318. [2021-10-20 05:38:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2933753943217665) internal successors, (727), 317 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 727 transitions. [2021-10-20 05:38:47,698 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 727 transitions. Word has length 29 [2021-10-20 05:38:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:47,699 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 727 transitions. [2021-10-20 05:38:47,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 727 transitions. [2021-10-20 05:38:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:47,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:47,701 INFO L512 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] [2021-10-20 05:38:47,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-20 05:38:47,701 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:47,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2036232328, now seen corresponding path program 22 times [2021-10-20 05:38:47,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:47,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300347848] [2021-10-20 05:38:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:47,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:47,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:47,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300347848] [2021-10-20 05:38:47,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300347848] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:47,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:47,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:47,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021039410] [2021-10-20 05:38:47,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:47,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:47,810 INFO L87 Difference]: Start difference. First operand 318 states and 727 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:48,047 INFO L93 Difference]: Finished difference Result 344 states and 768 transitions. [2021-10-20 05:38:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-20 05:38:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:48,050 INFO L225 Difference]: With dead ends: 344 [2021-10-20 05:38:48,050 INFO L226 Difference]: Without dead ends: 324 [2021-10-20 05:38:48,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-20 05:38:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-20 05:38:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 312. [2021-10-20 05:38:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.289389067524116) internal successors, (712), 311 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 712 transitions. [2021-10-20 05:38:48,062 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 712 transitions. Word has length 29 [2021-10-20 05:38:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:48,063 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 712 transitions. [2021-10-20 05:38:48,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 712 transitions. [2021-10-20 05:38:48,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:48,065 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:48,065 INFO L512 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] [2021-10-20 05:38:48,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-20 05:38:48,066 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:48,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2043547132, now seen corresponding path program 23 times [2021-10-20 05:38:48,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:48,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001262492] [2021-10-20 05:38:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:48,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:48,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:48,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001262492] [2021-10-20 05:38:48,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001262492] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:48,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:48,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:48,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071562054] [2021-10-20 05:38:48,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:48,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:48,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:48,196 INFO L87 Difference]: Start difference. First operand 312 states and 712 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:48,426 INFO L93 Difference]: Finished difference Result 358 states and 805 transitions. [2021-10-20 05:38:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-20 05:38:48,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:48,430 INFO L225 Difference]: With dead ends: 358 [2021-10-20 05:38:48,430 INFO L226 Difference]: Without dead ends: 340 [2021-10-20 05:38:48,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-20 05:38:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-10-20 05:38:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 314. [2021-10-20 05:38:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2843450479233227) internal successors, (715), 313 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 715 transitions. [2021-10-20 05:38:48,442 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 715 transitions. Word has length 29 [2021-10-20 05:38:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:48,442 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 715 transitions. [2021-10-20 05:38:48,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 715 transitions. [2021-10-20 05:38:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:48,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:48,444 INFO L512 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] [2021-10-20 05:38:48,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-20 05:38:48,445 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 145352174, now seen corresponding path program 24 times [2021-10-20 05:38:48,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:48,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292180603] [2021-10-20 05:38:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:48,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:48,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:48,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292180603] [2021-10-20 05:38:48,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292180603] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:48,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:48,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:48,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351777797] [2021-10-20 05:38:48,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:48,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:48,557 INFO L87 Difference]: Start difference. First operand 314 states and 715 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:48,822 INFO L93 Difference]: Finished difference Result 328 states and 738 transitions. [2021-10-20 05:38:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-20 05:38:48,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:48,826 INFO L225 Difference]: With dead ends: 328 [2021-10-20 05:38:48,826 INFO L226 Difference]: Without dead ends: 306 [2021-10-20 05:38:48,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-10-20 05:38:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-20 05:38:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2021-10-20 05:38:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2852459016393443) internal successors, (697), 305 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 697 transitions. [2021-10-20 05:38:48,837 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 697 transitions. Word has length 29 [2021-10-20 05:38:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:48,837 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 697 transitions. [2021-10-20 05:38:48,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 697 transitions. [2021-10-20 05:38:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:48,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:48,839 INFO L512 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] [2021-10-20 05:38:48,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-20 05:38:48,840 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1644500820, now seen corresponding path program 25 times [2021-10-20 05:38:48,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:48,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524019372] [2021-10-20 05:38:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:48,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:48,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:48,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524019372] [2021-10-20 05:38:48,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524019372] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:48,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:48,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:48,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561563283] [2021-10-20 05:38:48,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:48,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:48,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:48,939 INFO L87 Difference]: Start difference. First operand 306 states and 697 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:49,090 INFO L93 Difference]: Finished difference Result 348 states and 782 transitions. [2021-10-20 05:38:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 05:38:49,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:49,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:49,094 INFO L225 Difference]: With dead ends: 348 [2021-10-20 05:38:49,094 INFO L226 Difference]: Without dead ends: 336 [2021-10-20 05:38:49,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-20 05:38:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-10-20 05:38:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 306. [2021-10-20 05:38:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.278688524590164) internal successors, (695), 305 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 695 transitions. [2021-10-20 05:38:49,107 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 695 transitions. Word has length 29 [2021-10-20 05:38:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:49,107 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 695 transitions. [2021-10-20 05:38:49,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 695 transitions. [2021-10-20 05:38:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:49,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:49,109 INFO L512 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] [2021-10-20 05:38:49,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-20 05:38:49,110 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1320490360, now seen corresponding path program 26 times [2021-10-20 05:38:49,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:49,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757232071] [2021-10-20 05:38:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:49,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:49,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:49,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757232071] [2021-10-20 05:38:49,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757232071] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:49,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:49,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:49,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609209483] [2021-10-20 05:38:49,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:49,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:49,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:49,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:49,218 INFO L87 Difference]: Start difference. First operand 306 states and 695 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:49,381 INFO L93 Difference]: Finished difference Result 348 states and 780 transitions. [2021-10-20 05:38:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 05:38:49,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:49,385 INFO L225 Difference]: With dead ends: 348 [2021-10-20 05:38:49,385 INFO L226 Difference]: Without dead ends: 328 [2021-10-20 05:38:49,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-10-20 05:38:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-10-20 05:38:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 304. [2021-10-20 05:38:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.277227722772277) internal successors, (690), 303 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 690 transitions. [2021-10-20 05:38:49,394 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 690 transitions. Word has length 29 [2021-10-20 05:38:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:49,395 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 690 transitions. [2021-10-20 05:38:49,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 690 transitions. [2021-10-20 05:38:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:49,397 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:49,397 INFO L512 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] [2021-10-20 05:38:49,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-20 05:38:49,397 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash 780902570, now seen corresponding path program 27 times [2021-10-20 05:38:49,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:49,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275005131] [2021-10-20 05:38:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:49,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:49,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:49,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275005131] [2021-10-20 05:38:49,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275005131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:49,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:49,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:49,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140631141] [2021-10-20 05:38:49,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:49,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:49,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:49,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:49,496 INFO L87 Difference]: Start difference. First operand 304 states and 690 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:49,646 INFO L93 Difference]: Finished difference Result 312 states and 702 transitions. [2021-10-20 05:38:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 05:38:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:49,650 INFO L225 Difference]: With dead ends: 312 [2021-10-20 05:38:49,650 INFO L226 Difference]: Without dead ends: 300 [2021-10-20 05:38:49,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-20 05:38:49,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-10-20 05:38:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-10-20 05:38:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.274247491638796) internal successors, (680), 299 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 680 transitions. [2021-10-20 05:38:49,660 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 680 transitions. Word has length 29 [2021-10-20 05:38:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:49,661 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 680 transitions. [2021-10-20 05:38:49,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 680 transitions. [2021-10-20 05:38:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:49,663 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:49,663 INFO L512 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] [2021-10-20 05:38:49,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-20 05:38:49,663 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:49,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:49,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1649175880, now seen corresponding path program 28 times [2021-10-20 05:38:49,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:49,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477553595] [2021-10-20 05:38:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:49,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:49,776 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:49,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477553595] [2021-10-20 05:38:49,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477553595] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:49,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:49,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:49,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950286002] [2021-10-20 05:38:49,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:49,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:49,779 INFO L87 Difference]: Start difference. First operand 300 states and 680 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:49,935 INFO L93 Difference]: Finished difference Result 310 states and 695 transitions. [2021-10-20 05:38:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-20 05:38:49,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:49,951 INFO L225 Difference]: With dead ends: 310 [2021-10-20 05:38:49,951 INFO L226 Difference]: Without dead ends: 298 [2021-10-20 05:38:49,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-10-20 05:38:49,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-20 05:38:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-10-20 05:38:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.272727272727273) internal successors, (675), 297 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 675 transitions. [2021-10-20 05:38:49,961 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 675 transitions. Word has length 29 [2021-10-20 05:38:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:49,962 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 675 transitions. [2021-10-20 05:38:49,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 675 transitions. [2021-10-20 05:38:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:49,963 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:49,963 INFO L512 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] [2021-10-20 05:38:49,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-20 05:38:49,964 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:49,965 INFO L82 PathProgramCache]: Analyzing trace with hash -997497558, now seen corresponding path program 29 times [2021-10-20 05:38:49,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:49,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108681785] [2021-10-20 05:38:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:49,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:50,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:50,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108681785] [2021-10-20 05:38:50,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108681785] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:50,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:50,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-20 05:38:50,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011327856] [2021-10-20 05:38:50,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 05:38:50,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 05:38:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:38:50,065 INFO L87 Difference]: Start difference. First operand 298 states and 675 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:50,230 INFO L93 Difference]: Finished difference Result 310 states and 695 transitions. [2021-10-20 05:38:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 05:38:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:50,233 INFO L225 Difference]: With dead ends: 310 [2021-10-20 05:38:50,233 INFO L226 Difference]: Without dead ends: 292 [2021-10-20 05:38:50,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-20 05:38:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-20 05:38:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-10-20 05:38:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.268041237113402) internal successors, (660), 291 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 660 transitions. [2021-10-20 05:38:50,252 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 660 transitions. Word has length 29 [2021-10-20 05:38:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:50,253 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 660 transitions. [2021-10-20 05:38:50,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 660 transitions. [2021-10-20 05:38:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:50,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:50,255 INFO L512 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] [2021-10-20 05:38:50,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-20 05:38:50,255 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1191401748, now seen corresponding path program 30 times [2021-10-20 05:38:50,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:50,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338210589] [2021-10-20 05:38:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:50,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:50,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:50,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338210589] [2021-10-20 05:38:50,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338210589] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:50,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:50,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:50,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17427107] [2021-10-20 05:38:50,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:50,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:50,363 INFO L87 Difference]: Start difference. First operand 292 states and 660 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:50,518 INFO L93 Difference]: Finished difference Result 274 states and 619 transitions. [2021-10-20 05:38:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 05:38:50,518 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:50,520 INFO L225 Difference]: With dead ends: 274 [2021-10-20 05:38:50,520 INFO L226 Difference]: Without dead ends: 250 [2021-10-20 05:38:50,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-20 05:38:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-20 05:38:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2021-10-20 05:38:50,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.325301204819277) internal successors, (579), 249 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 579 transitions. [2021-10-20 05:38:50,530 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 579 transitions. Word has length 29 [2021-10-20 05:38:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:50,530 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 579 transitions. [2021-10-20 05:38:50,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 579 transitions. [2021-10-20 05:38:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:50,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:50,532 INFO L512 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] [2021-10-20 05:38:50,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-20 05:38:50,532 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash 328426142, now seen corresponding path program 31 times [2021-10-20 05:38:50,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:50,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883991163] [2021-10-20 05:38:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:50,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:50,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:50,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883991163] [2021-10-20 05:38:50,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883991163] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:50,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:50,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-20 05:38:50,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622886688] [2021-10-20 05:38:50,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 05:38:50,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 05:38:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-20 05:38:50,697 INFO L87 Difference]: Start difference. First operand 250 states and 579 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:50,900 INFO L93 Difference]: Finished difference Result 298 states and 672 transitions. [2021-10-20 05:38:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-20 05:38:50,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:50,902 INFO L225 Difference]: With dead ends: 298 [2021-10-20 05:38:50,902 INFO L226 Difference]: Without dead ends: 278 [2021-10-20 05:38:50,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-20 05:38:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-20 05:38:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2021-10-20 05:38:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.2618181818181817) internal successors, (622), 275 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 622 transitions. [2021-10-20 05:38:50,911 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 622 transitions. Word has length 29 [2021-10-20 05:38:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:50,912 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 622 transitions. [2021-10-20 05:38:50,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 622 transitions. [2021-10-20 05:38:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-20 05:38:50,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:38:50,913 INFO L512 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] [2021-10-20 05:38:50,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-20 05:38:50,914 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-20 05:38:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:38:50,914 INFO L82 PathProgramCache]: Analyzing trace with hash -307160290, now seen corresponding path program 32 times [2021-10-20 05:38:50,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:38:50,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058926025] [2021-10-20 05:38:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:38:50,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:38:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:38:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:38:51,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:38:51,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058926025] [2021-10-20 05:38:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058926025] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:38:51,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:38:51,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:38:51,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241822559] [2021-10-20 05:38:51,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 05:38:51,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:38:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 05:38:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:38:51,028 INFO L87 Difference]: Start difference. First operand 276 states and 622 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:38:51,049 INFO L93 Difference]: Finished difference Result 275 states and 621 transitions. [2021-10-20 05:38:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 05:38:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-20 05:38:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:38:51,050 INFO L225 Difference]: With dead ends: 275 [2021-10-20 05:38:51,050 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 05:38:51,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:38:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 05:38:51,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 05:38:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 05:38:51,053 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-10-20 05:38:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:38:51,054 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 05:38:51,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:38:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 05:38:51,054 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 05:38:51,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:38:51,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-20 05:38:51,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-20 05:38:51,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-20 05:38:51,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-20 05:38:51,064 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-20 05:38:51,065 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:38:51,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:38:51 BasicIcfg [2021-10-20 05:38:51,068 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:38:51,069 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:38:51,069 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:38:51,069 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:38:51,070 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:38:31" (3/4) ... [2021-10-20 05:38:51,074 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 05:38:51,081 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-20 05:38:51,081 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-20 05:38:51,081 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-20 05:38:51,093 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-20 05:38:51,093 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-20 05:38:51,094 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:38:51,094 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:38:51,151 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:38:51,152 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:38:51,153 INFO L168 Benchmark]: Toolchain (without parser) took 21004.19 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 59.6 MB in the beginning and 44.8 MB in the end (delta: 14.8 MB). Peak memory consumption was 61.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:38:51,154 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 100.7 MB. Free memory is still 75.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:38:51,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.74 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 75.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-20 05:38:51,155 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.30 ms. Allocated memory is still 100.7 MB. Free memory was 75.3 MB in the beginning and 73.5 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:38:51,156 INFO L168 Benchmark]: Boogie Preprocessor took 55.71 ms. Allocated memory is still 100.7 MB. Free memory was 73.5 MB in the beginning and 72.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:38:51,156 INFO L168 Benchmark]: RCFGBuilder took 479.98 ms. Allocated memory is still 100.7 MB. Free memory was 72.2 MB in the beginning and 56.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-20 05:38:51,157 INFO L168 Benchmark]: TraceAbstraction took 19920.76 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 56.4 MB in the beginning and 47.9 MB in the end (delta: 8.5 MB). Peak memory consumption was 54.9 MB. Max. memory is 16.1 GB. [2021-10-20 05:38:51,157 INFO L168 Benchmark]: Witness Printer took 82.69 ms. Allocated memory is still 146.8 MB. Free memory was 47.9 MB in the beginning and 44.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:38:51,161 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 100.7 MB. Free memory is still 75.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 390.74 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 75.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.30 ms. Allocated memory is still 100.7 MB. Free memory was 75.3 MB in the beginning and 73.5 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.71 ms. Allocated memory is still 100.7 MB. Free memory was 73.5 MB in the beginning and 72.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 479.98 ms. Allocated memory is still 100.7 MB. Free memory was 72.2 MB in the beginning and 56.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19920.76 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 56.4 MB in the beginning and 47.9 MB in the end (delta: 8.5 MB). Peak memory consumption was 54.9 MB. Max. memory is 16.1 GB. * Witness Printer took 82.69 ms. Allocated memory is still 146.8 MB. Free memory was 47.9 MB in the beginning and 44.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5936.0ms, 137 PlacesBefore, 43 PlacesAfterwards, 132 TransitionsBefore, 34 TransitionsAfterwards, 2032 CoEnabledTransitionPairs, 7 FixpointIterations, 66 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 113 TotalNumberOfCompositions, 6055 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3153, positive: 2946, positive conditional: 0, positive unconditional: 2946, negative: 207, negative conditional: 0, negative unconditional: 207, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1468, positive: 1406, positive conditional: 0, positive unconditional: 1406, negative: 62, negative conditional: 0, negative unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1468, positive: 1385, positive conditional: 0, positive unconditional: 1385, negative: 83, negative conditional: 0, negative unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 83, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 62, negative conditional: 0, negative unconditional: 62, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 182, positive: 35, positive conditional: 0, positive unconditional: 35, negative: 147, negative conditional: 0, negative unconditional: 147, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3153, positive: 1540, positive conditional: 0, positive unconditional: 1540, negative: 145, negative conditional: 0, negative unconditional: 145, unknown: 1468, unknown conditional: 0, unknown unconditional: 1468] , Statistics on independence cache: Total cache size (in pairs): 209, Positive cache size: 183, Positive conditional cache size: 0, Positive unconditional cache size: 183, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 104]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 171 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 19703.1ms, OverallIterations: 33, TraceHistogramMax: 1, EmptinessCheckTime: 125.4ms, AutomataDifference: 7411.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6054.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1505 SDtfs, 1608 SDslu, 6248 SDs, 0 SdLazy, 5856 SolverSat, 361 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3713.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 442 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 3165.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=882occurred in iteration=4, InterpolantAutomatonStates: 370, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 922.3ms AutomataMinimizationTime, 33 MinimizatonAttempts, 1620 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 128.1ms SsaConstructionTime, 1443.9ms SatisfiabilityAnalysisTime, 3098.9ms InterpolantComputationTime, 953 NumberOfCodeBlocks, 953 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 920 ConstructedInterpolants, 0 QuantifiedInterpolants, 3332 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 33 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-20 05:38:51,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0398dd96-99a2-4cc4-9c48-dea74be85a7b/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...