./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label29.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label29.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF --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 372b0f8557f493ed9d29c5f8057b8dc54ad330866696fd4878e863a88379edbf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:27:10,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:27:10,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:27:10,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:27:10,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:27:10,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:27:10,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:27:10,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:27:10,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:27:10,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:27:10,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:27:10,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:27:10,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:27:10,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:27:10,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:27:10,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:27:10,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:27:10,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:27:10,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:27:10,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:27:10,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:27:10,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:27:10,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:27:10,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:27:10,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:27:10,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:27:10,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:27:10,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:27:10,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:27:10,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:27:10,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:27:10,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:27:10,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:27:10,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:27:10,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:27:10,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:27:10,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:27:10,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:27:10,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:27:10,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:27:10,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:27:10,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:27:10,706 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:27:10,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:27:10,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:27:10,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:27:10,709 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:27:10,709 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:27:10,709 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:27:10,710 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:27:10,718 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:27:10,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:27:10,719 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:27:10,720 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:27:10,720 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:27:10,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:27:10,720 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:27:10,721 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:27:10,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:27:10,722 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:27:10,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:27:10,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:27:10,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:27:10,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:27:10,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:27:10,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:27:10,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:27:10,725 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:27:10,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:27:10,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:27:10,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:27:10,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:27:10,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:27:10,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:27:10,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:27:10,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:27:10,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:27:10,728 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:27:10,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:27:10,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:27:10,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:27:10,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:27:10,730 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_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 372b0f8557f493ed9d29c5f8057b8dc54ad330866696fd4878e863a88379edbf [2021-11-13 02:27:11,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:27:11,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:27:11,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:27:11,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:27:11,099 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:27:11,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2021-11-13 02:27:11,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/data/25c02b232/e64915b4624f4a108f0024f4c00901ab/FLAG51f24309e [2021-11-13 02:27:12,046 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:27:12,047 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/sv-benchmarks/c/eca-rers2012/Problem03_label29.c [2021-11-13 02:27:12,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/data/25c02b232/e64915b4624f4a108f0024f4c00901ab/FLAG51f24309e [2021-11-13 02:27:12,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/data/25c02b232/e64915b4624f4a108f0024f4c00901ab [2021-11-13 02:27:12,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:27:12,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:27:12,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:27:12,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:27:12,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:27:12,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:27:12" (1/1) ... [2021-11-13 02:27:12,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b59d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:12, skipping insertion in model container [2021-11-13 02:27:12,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:27:12" (1/1) ... [2021-11-13 02:27:12,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:27:12,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:27:13,063 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_bf59b225-05e2-4cc8-8f84-db9c425e3dce/sv-benchmarks/c/eca-rers2012/Problem03_label29.c[58258,58271] [2021-11-13 02:27:13,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:27:13,127 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:27:13,507 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_bf59b225-05e2-4cc8-8f84-db9c425e3dce/sv-benchmarks/c/eca-rers2012/Problem03_label29.c[58258,58271] [2021-11-13 02:27:13,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:27:13,547 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:27:13,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13 WrapperNode [2021-11-13 02:27:13,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:27:13,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:27:13,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:27:13,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:27:13,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:27:13,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:27:13,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:27:13,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:27:13,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:27:13,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:27:13,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:27:13,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:27:13,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (1/1) ... [2021-11-13 02:27:13,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:27:13,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:13,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:27:13,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:27:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:27:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:27:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:27:14,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:27:16,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:27:16,607 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:27:16,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:16 BoogieIcfgContainer [2021-11-13 02:27:16,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:27:16,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:27:16,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:27:16,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:27:16,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:27:12" (1/3) ... [2021-11-13 02:27:16,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399e80f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:16, skipping insertion in model container [2021-11-13 02:27:16,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:27:13" (2/3) ... [2021-11-13 02:27:16,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399e80f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:27:16, skipping insertion in model container [2021-11-13 02:27:16,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:16" (3/3) ... [2021-11-13 02:27:16,622 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label29.c [2021-11-13 02:27:16,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:27:16,628 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:27:16,704 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:27:16,719 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:27:16,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:27:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2021-11-13 02:27:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:27:16,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:16,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:16,786 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash 209345719, now seen corresponding path program 1 times [2021-11-13 02:27:16,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:16,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766679140] [2021-11-13 02:27:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:16,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:17,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:17,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766679140] [2021-11-13 02:27:17,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766679140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:17,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:17,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:17,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274638204] [2021-11-13 02:27:17,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:17,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:17,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:17,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:17,592 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2021-11-13 02:27:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:18,726 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2021-11-13 02:27:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2021-11-13 02:27:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:18,747 INFO L225 Difference]: With dead ends: 440 [2021-11-13 02:27:18,747 INFO L226 Difference]: Without dead ends: 289 [2021-11-13 02:27:18,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:18,756 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 849.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.55ms SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1048.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:18,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 578 Unknown, 0 Unchecked, 9.55ms Time], IncrementalHoareTripleChecker [118 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1048.37ms Time] [2021-11-13 02:27:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-13 02:27:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-13 02:27:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.5902777777777777) internal successors, (458), 288 states have internal predecessors, (458), 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) [2021-11-13 02:27:18,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 458 transitions. [2021-11-13 02:27:18,868 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 458 transitions. Word has length 143 [2021-11-13 02:27:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:18,870 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 458 transitions. [2021-11-13 02:27:18,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2021-11-13 02:27:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 458 transitions. [2021-11-13 02:27:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 02:27:18,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:18,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:18,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:27:18,877 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:18,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1094386006, now seen corresponding path program 1 times [2021-11-13 02:27:18,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:18,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951243570] [2021-11-13 02:27:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:18,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:18,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:18,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951243570] [2021-11-13 02:27:18,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951243570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:18,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:18,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:18,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836138148] [2021-11-13 02:27:18,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:18,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:18,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:18,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:19,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:19,000 INFO L87 Difference]: Start difference. First operand 289 states and 458 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2021-11-13 02:27:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:19,952 INFO L93 Difference]: Finished difference Result 863 states and 1371 transitions. [2021-11-13 02:27:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:19,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 151 [2021-11-13 02:27:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:19,958 INFO L225 Difference]: With dead ends: 863 [2021-11-13 02:27:19,958 INFO L226 Difference]: Without dead ends: 575 [2021-11-13 02:27:19,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:19,962 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 729.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.22ms SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 911.05ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:19,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 25 Invalid, 622 Unknown, 0 Unchecked, 7.22ms Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 911.05ms Time] [2021-11-13 02:27:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-13 02:27:20,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2021-11-13 02:27:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5470383275261324) internal successors, (888), 574 states have internal predecessors, (888), 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) [2021-11-13 02:27:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 888 transitions. [2021-11-13 02:27:20,007 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 888 transitions. Word has length 151 [2021-11-13 02:27:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:20,008 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 888 transitions. [2021-11-13 02:27:20,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2021-11-13 02:27:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 888 transitions. [2021-11-13 02:27:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 02:27:20,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:20,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:20,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:27:20,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1988463347, now seen corresponding path program 1 times [2021-11-13 02:27:20,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:20,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436027006] [2021-11-13 02:27:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:20,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:20,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:20,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436027006] [2021-11-13 02:27:20,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436027006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:20,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:20,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:20,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108233822] [2021-11-13 02:27:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:20,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:20,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:20,119 INFO L87 Difference]: Start difference. First operand 575 states and 888 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-11-13 02:27:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:21,120 INFO L93 Difference]: Finished difference Result 1723 states and 2662 transitions. [2021-11-13 02:27:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:21,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 156 [2021-11-13 02:27:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:21,132 INFO L225 Difference]: With dead ends: 1723 [2021-11-13 02:27:21,132 INFO L226 Difference]: Without dead ends: 1149 [2021-11-13 02:27:21,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:21,138 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 158 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 760.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.43ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 949.26ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:21,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 105 Invalid, 604 Unknown, 0 Unchecked, 5.43ms Time], IncrementalHoareTripleChecker [81 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 949.26ms Time] [2021-11-13 02:27:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-13 02:27:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2021-11-13 02:27:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4589877835951135) internal successors, (1672), 1146 states have internal predecessors, (1672), 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) [2021-11-13 02:27:21,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1672 transitions. [2021-11-13 02:27:21,214 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1672 transitions. Word has length 156 [2021-11-13 02:27:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:21,214 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1672 transitions. [2021-11-13 02:27:21,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-11-13 02:27:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1672 transitions. [2021-11-13 02:27:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 02:27:21,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:21,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:21,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:27:21,226 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1051101443, now seen corresponding path program 1 times [2021-11-13 02:27:21,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:21,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94606583] [2021-11-13 02:27:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:21,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:27:21,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:21,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94606583] [2021-11-13 02:27:21,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94606583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:21,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:21,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:27:21,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597242649] [2021-11-13 02:27:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:21,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:21,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:21,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:21,395 INFO L87 Difference]: Start difference. First operand 1147 states and 1672 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-11-13 02:27:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:22,329 INFO L93 Difference]: Finished difference Result 2865 states and 4341 transitions. [2021-11-13 02:27:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 163 [2021-11-13 02:27:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:22,343 INFO L225 Difference]: With dead ends: 2865 [2021-11-13 02:27:22,344 INFO L226 Difference]: Without dead ends: 1719 [2021-11-13 02:27:22,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:22,359 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 153 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 714.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.71ms SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 851.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:22,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 254 Invalid, 573 Unknown, 0 Unchecked, 5.71ms Time], IncrementalHoareTripleChecker [165 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 851.66ms Time] [2021-11-13 02:27:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-11-13 02:27:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2021-11-13 02:27:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.3777648428405123) internal successors, (2367), 1718 states have internal predecessors, (2367), 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) [2021-11-13 02:27:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2367 transitions. [2021-11-13 02:27:22,457 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2367 transitions. Word has length 163 [2021-11-13 02:27:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:22,458 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2367 transitions. [2021-11-13 02:27:22,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-11-13 02:27:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2367 transitions. [2021-11-13 02:27:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-13 02:27:22,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:22,468 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:22,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:27:22,469 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash -520473239, now seen corresponding path program 1 times [2021-11-13 02:27:22,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:22,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358228401] [2021-11-13 02:27:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:22,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:27:22,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:22,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358228401] [2021-11-13 02:27:22,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358228401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:22,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:22,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:27:22,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843727218] [2021-11-13 02:27:22,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:22,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:22,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:22,625 INFO L87 Difference]: Start difference. First operand 1719 states and 2367 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2021-11-13 02:27:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:23,631 INFO L93 Difference]: Finished difference Result 4295 states and 5889 transitions. [2021-11-13 02:27:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 171 [2021-11-13 02:27:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:23,650 INFO L225 Difference]: With dead ends: 4295 [2021-11-13 02:27:23,650 INFO L226 Difference]: Without dead ends: 2577 [2021-11-13 02:27:23,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:23,661 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 783.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.66ms SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 934.46ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:23,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 261 Invalid, 579 Unknown, 0 Unchecked, 5.66ms Time], IncrementalHoareTripleChecker [131 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 934.46ms Time] [2021-11-13 02:27:23,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-11-13 02:27:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2577. [2021-11-13 02:27:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 1.3156055900621118) internal successors, (3389), 2576 states have internal predecessors, (3389), 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) [2021-11-13 02:27:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 3389 transitions. [2021-11-13 02:27:23,752 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 3389 transitions. Word has length 171 [2021-11-13 02:27:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:23,756 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 3389 transitions. [2021-11-13 02:27:23,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2021-11-13 02:27:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 3389 transitions. [2021-11-13 02:27:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 02:27:23,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:23,766 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:23,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:27:23,767 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash 610404892, now seen corresponding path program 1 times [2021-11-13 02:27:23,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:23,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61850095] [2021-11-13 02:27:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:23,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:27:23,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:23,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61850095] [2021-11-13 02:27:23,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61850095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:23,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:23,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:23,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100752799] [2021-11-13 02:27:23,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:23,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:23,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:23,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:23,928 INFO L87 Difference]: Start difference. First operand 2577 states and 3389 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-11-13 02:27:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:24,442 INFO L93 Difference]: Finished difference Result 5153 states and 6777 transitions. [2021-11-13 02:27:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 176 [2021-11-13 02:27:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:24,463 INFO L225 Difference]: With dead ends: 5153 [2021-11-13 02:27:24,463 INFO L226 Difference]: Without dead ends: 2577 [2021-11-13 02:27:24,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:24,469 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 378.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 450.28ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:24,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 450.28ms Time] [2021-11-13 02:27:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-11-13 02:27:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2577. [2021-11-13 02:27:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 1.281444099378882) internal successors, (3301), 2576 states have internal predecessors, (3301), 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) [2021-11-13 02:27:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 3301 transitions. [2021-11-13 02:27:24,556 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 3301 transitions. Word has length 176 [2021-11-13 02:27:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:24,556 INFO L470 AbstractCegarLoop]: Abstraction has 2577 states and 3301 transitions. [2021-11-13 02:27:24,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-11-13 02:27:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 3301 transitions. [2021-11-13 02:27:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-13 02:27:24,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:24,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:24,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:27:24,566 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1441036603, now seen corresponding path program 1 times [2021-11-13 02:27:24,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:24,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32761813] [2021-11-13 02:27:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:24,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:24,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:24,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32761813] [2021-11-13 02:27:24,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32761813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:24,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091821372] [2021-11-13 02:27:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:24,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:24,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:24,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:27:24,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:27:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:27:24,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:27:25,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:27:26,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091821372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:26,000 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:26,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2021-11-13 02:27:26,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763341819] [2021-11-13 02:27:26,001 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:26,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:26,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:26,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:26,012 INFO L87 Difference]: Start difference. First operand 2577 states and 3301 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-11-13 02:27:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:27,048 INFO L93 Difference]: Finished difference Result 6297 states and 8152 transitions. [2021-11-13 02:27:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 181 [2021-11-13 02:27:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:27,076 INFO L225 Difference]: With dead ends: 6297 [2021-11-13 02:27:27,076 INFO L226 Difference]: Without dead ends: 3721 [2021-11-13 02:27:27,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:27,082 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 826.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.67ms SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 960.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:27,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 218 Invalid, 549 Unknown, 0 Unchecked, 4.67ms Time], IncrementalHoareTripleChecker [126 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 960.68ms Time] [2021-11-13 02:27:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-11-13 02:27:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3721. [2021-11-13 02:27:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3720 states have (on average 1.2596774193548388) internal successors, (4686), 3720 states have internal predecessors, (4686), 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) [2021-11-13 02:27:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 4686 transitions. [2021-11-13 02:27:27,262 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 4686 transitions. Word has length 181 [2021-11-13 02:27:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:27,263 INFO L470 AbstractCegarLoop]: Abstraction has 3721 states and 4686 transitions. [2021-11-13 02:27:27,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2021-11-13 02:27:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 4686 transitions. [2021-11-13 02:27:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-13 02:27:27,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:27,276 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:27,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:27:27,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:27,490 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1370561676, now seen corresponding path program 1 times [2021-11-13 02:27:27,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:27,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001925917] [2021-11-13 02:27:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:27,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:27:27,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:27,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001925917] [2021-11-13 02:27:27,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001925917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:27,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:27,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:27:27,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022182099] [2021-11-13 02:27:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:27,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:27:27,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:27:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:27,614 INFO L87 Difference]: Start difference. First operand 3721 states and 4686 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 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) [2021-11-13 02:27:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:28,643 INFO L93 Difference]: Finished difference Result 10444 states and 13269 transitions. [2021-11-13 02:27:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:27:28,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 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 213 [2021-11-13 02:27:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:28,689 INFO L225 Difference]: With dead ends: 10444 [2021-11-13 02:27:28,689 INFO L226 Difference]: Without dead ends: 6724 [2021-11-13 02:27:28,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:28,697 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 306 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 759.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.89ms SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 932.50ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:28,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 11 Invalid, 790 Unknown, 0 Unchecked, 6.89ms Time], IncrementalHoareTripleChecker [153 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 932.50ms Time] [2021-11-13 02:27:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6724 states. [2021-11-13 02:27:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6724 to 6581. [2021-11-13 02:27:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6581 states, 6580 states have (on average 1.214741641337386) internal successors, (7993), 6580 states have internal predecessors, (7993), 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) [2021-11-13 02:27:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 7993 transitions. [2021-11-13 02:27:28,905 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 7993 transitions. Word has length 213 [2021-11-13 02:27:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:28,906 INFO L470 AbstractCegarLoop]: Abstraction has 6581 states and 7993 transitions. [2021-11-13 02:27:28,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 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) [2021-11-13 02:27:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 7993 transitions. [2021-11-13 02:27:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 02:27:28,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:28,974 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:28,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:27:28,975 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:28,976 INFO L85 PathProgramCache]: Analyzing trace with hash -441778339, now seen corresponding path program 1 times [2021-11-13 02:27:28,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:28,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811540666] [2021-11-13 02:27:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:28,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:27:29,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:29,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811540666] [2021-11-13 02:27:29,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811540666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:29,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:29,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:27:29,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385649747] [2021-11-13 02:27:29,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:29,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:29,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:29,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:29,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:29,215 INFO L87 Difference]: Start difference. First operand 6581 states and 7993 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2021-11-13 02:27:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:30,143 INFO L93 Difference]: Finished difference Result 15878 states and 19367 transitions. [2021-11-13 02:27:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:30,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 236 [2021-11-13 02:27:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:30,201 INFO L225 Difference]: With dead ends: 15878 [2021-11-13 02:27:30,201 INFO L226 Difference]: Without dead ends: 9298 [2021-11-13 02:27:30,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:30,213 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 68 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 654.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.68ms SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 821.82ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:30,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 238 Invalid, 572 Unknown, 0 Unchecked, 4.68ms Time], IncrementalHoareTripleChecker [136 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 821.82ms Time] [2021-11-13 02:27:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9298 states. [2021-11-13 02:27:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9298 to 9012. [2021-11-13 02:27:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9012 states, 9011 states have (on average 1.199311952058595) internal successors, (10807), 9011 states have internal predecessors, (10807), 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) [2021-11-13 02:27:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9012 states to 9012 states and 10807 transitions. [2021-11-13 02:27:30,463 INFO L78 Accepts]: Start accepts. Automaton has 9012 states and 10807 transitions. Word has length 236 [2021-11-13 02:27:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:30,463 INFO L470 AbstractCegarLoop]: Abstraction has 9012 states and 10807 transitions. [2021-11-13 02:27:30,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2021-11-13 02:27:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 9012 states and 10807 transitions. [2021-11-13 02:27:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-13 02:27:30,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:30,488 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:30,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 02:27:30,488 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1282081121, now seen corresponding path program 1 times [2021-11-13 02:27:30,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:30,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325997309] [2021-11-13 02:27:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:30,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 02:27:30,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:30,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325997309] [2021-11-13 02:27:30,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325997309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:30,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:30,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:30,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162171521] [2021-11-13 02:27:30,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:30,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:30,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:30,600 INFO L87 Difference]: Start difference. First operand 9012 states and 10807 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2021-11-13 02:27:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:31,521 INFO L93 Difference]: Finished difference Result 21312 states and 25427 transitions. [2021-11-13 02:27:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:31,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 249 [2021-11-13 02:27:31,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:31,562 INFO L225 Difference]: With dead ends: 21312 [2021-11-13 02:27:31,562 INFO L226 Difference]: Without dead ends: 12301 [2021-11-13 02:27:31,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:31,576 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 682.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 822.41ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:31,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 88 Invalid, 571 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [77 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 822.41ms Time] [2021-11-13 02:27:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2021-11-13 02:27:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 12301. [2021-11-13 02:27:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12301 states, 12300 states have (on average 1.179349593495935) internal successors, (14506), 12300 states have internal predecessors, (14506), 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) [2021-11-13 02:27:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12301 states to 12301 states and 14506 transitions. [2021-11-13 02:27:31,888 INFO L78 Accepts]: Start accepts. Automaton has 12301 states and 14506 transitions. Word has length 249 [2021-11-13 02:27:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:31,889 INFO L470 AbstractCegarLoop]: Abstraction has 12301 states and 14506 transitions. [2021-11-13 02:27:31,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2021-11-13 02:27:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 12301 states and 14506 transitions. [2021-11-13 02:27:31,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-13 02:27:31,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:31,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:31,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 02:27:31,919 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:31,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1733561926, now seen corresponding path program 1 times [2021-11-13 02:27:31,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:31,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27910530] [2021-11-13 02:27:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:31,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 02:27:32,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:32,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27910530] [2021-11-13 02:27:32,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27910530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:32,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:32,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:32,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412941499] [2021-11-13 02:27:32,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:32,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:32,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:32,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:32,110 INFO L87 Difference]: Start difference. First operand 12301 states and 14506 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-11-13 02:27:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:33,023 INFO L93 Difference]: Finished difference Result 27606 states and 32488 transitions. [2021-11-13 02:27:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:33,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 251 [2021-11-13 02:27:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:33,059 INFO L225 Difference]: With dead ends: 27606 [2021-11-13 02:27:33,059 INFO L226 Difference]: Without dead ends: 15592 [2021-11-13 02:27:33,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:33,075 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 578.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.09ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 780.59ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:33,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 115 Invalid, 580 Unknown, 0 Unchecked, 4.09ms Time], IncrementalHoareTripleChecker [14 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 780.59ms Time] [2021-11-13 02:27:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15592 states. [2021-11-13 02:27:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15592 to 15304. [2021-11-13 02:27:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15304 states, 15303 states have (on average 1.1757825263020323) internal successors, (17993), 15303 states have internal predecessors, (17993), 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) [2021-11-13 02:27:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15304 states to 15304 states and 17993 transitions. [2021-11-13 02:27:33,516 INFO L78 Accepts]: Start accepts. Automaton has 15304 states and 17993 transitions. Word has length 251 [2021-11-13 02:27:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:33,516 INFO L470 AbstractCegarLoop]: Abstraction has 15304 states and 17993 transitions. [2021-11-13 02:27:33,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-11-13 02:27:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 15304 states and 17993 transitions. [2021-11-13 02:27:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-13 02:27:33,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:33,552 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:33,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 02:27:33,552 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash 825161667, now seen corresponding path program 1 times [2021-11-13 02:27:33,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:33,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44998194] [2021-11-13 02:27:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:33,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:27:33,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:33,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44998194] [2021-11-13 02:27:33,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44998194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:33,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:33,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:33,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338459096] [2021-11-13 02:27:33,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:33,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:33,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:33,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:33,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:33,698 INFO L87 Difference]: Start difference. First operand 15304 states and 17993 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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) [2021-11-13 02:27:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:34,754 INFO L93 Difference]: Finished difference Result 34611 states and 40790 transitions. [2021-11-13 02:27:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:34,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 262 [2021-11-13 02:27:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:34,807 INFO L225 Difference]: With dead ends: 34611 [2021-11-13 02:27:34,807 INFO L226 Difference]: Without dead ends: 19880 [2021-11-13 02:27:34,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:34,824 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 94 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 766.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.27ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 888.73ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:34,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 71 Invalid, 558 Unknown, 0 Unchecked, 4.27ms Time], IncrementalHoareTripleChecker [45 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 888.73ms Time] [2021-11-13 02:27:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19880 states. [2021-11-13 02:27:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19880 to 19737. [2021-11-13 02:27:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19737 states, 19736 states have (on average 1.1651803810295907) internal successors, (22996), 19736 states have internal predecessors, (22996), 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) [2021-11-13 02:27:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19737 states to 19737 states and 22996 transitions. [2021-11-13 02:27:35,251 INFO L78 Accepts]: Start accepts. Automaton has 19737 states and 22996 transitions. Word has length 262 [2021-11-13 02:27:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:35,252 INFO L470 AbstractCegarLoop]: Abstraction has 19737 states and 22996 transitions. [2021-11-13 02:27:35,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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) [2021-11-13 02:27:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19737 states and 22996 transitions. [2021-11-13 02:27:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-13 02:27:35,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:35,284 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:35,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 02:27:35,285 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash -301341794, now seen corresponding path program 2 times [2021-11-13 02:27:35,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:35,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881587307] [2021-11-13 02:27:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:35,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 137 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:27:35,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:35,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881587307] [2021-11-13 02:27:35,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881587307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:35,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041931716] [2021-11-13 02:27:35,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:27:35,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:35,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:35,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:27:35,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:27:35,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-13 02:27:35,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:27:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:27:35,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-13 02:27:36,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-13 02:27:37,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041931716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:37,523 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:37,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-11-13 02:27:37,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745725169] [2021-11-13 02:27:37,524 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:37,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:37,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:37,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:37,527 INFO L87 Difference]: Start difference. First operand 19737 states and 22996 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-11-13 02:27:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:38,385 INFO L93 Difference]: Finished difference Result 39902 states and 46966 transitions. [2021-11-13 02:27:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:38,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 269 [2021-11-13 02:27:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:38,509 INFO L225 Difference]: With dead ends: 39902 [2021-11-13 02:27:38,509 INFO L226 Difference]: Without dead ends: 21453 [2021-11-13 02:27:38,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 535 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:38,523 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 579.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 717.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:38,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 20 Invalid, 555 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [74 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 717.54ms Time] [2021-11-13 02:27:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21453 states. [2021-11-13 02:27:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21453 to 21453. [2021-11-13 02:27:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21453 states, 21452 states have (on average 1.1818478463546522) internal successors, (25353), 21452 states have internal predecessors, (25353), 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) [2021-11-13 02:27:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21453 states to 21453 states and 25353 transitions. [2021-11-13 02:27:38,869 INFO L78 Accepts]: Start accepts. Automaton has 21453 states and 25353 transitions. Word has length 269 [2021-11-13 02:27:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:38,870 INFO L470 AbstractCegarLoop]: Abstraction has 21453 states and 25353 transitions. [2021-11-13 02:27:38,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-11-13 02:27:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 21453 states and 25353 transitions. [2021-11-13 02:27:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-13 02:27:38,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:38,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:38,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:27:39,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:39,123 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:39,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1853989418, now seen corresponding path program 1 times [2021-11-13 02:27:39,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:39,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872245668] [2021-11-13 02:27:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:39,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-13 02:27:39,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:39,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872245668] [2021-11-13 02:27:39,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872245668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:39,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:39,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:39,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862864448] [2021-11-13 02:27:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:39,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:39,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:39,311 INFO L87 Difference]: Start difference. First operand 21453 states and 25353 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2021-11-13 02:27:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:40,059 INFO L93 Difference]: Finished difference Result 42190 states and 49919 transitions. [2021-11-13 02:27:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 283 [2021-11-13 02:27:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:40,098 INFO L225 Difference]: With dead ends: 42190 [2021-11-13 02:27:40,098 INFO L226 Difference]: Without dead ends: 21882 [2021-11-13 02:27:40,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:40,111 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 489.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 580.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:40,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 102 Invalid, 445 Unknown, 0 Unchecked, 3.41ms Time], IncrementalHoareTripleChecker [1 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 580.37ms Time] [2021-11-13 02:27:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21882 states. [2021-11-13 02:27:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21882 to 21882. [2021-11-13 02:27:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21882 states, 21881 states have (on average 1.180933229742699) internal successors, (25840), 21881 states have internal predecessors, (25840), 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) [2021-11-13 02:27:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21882 states to 21882 states and 25840 transitions. [2021-11-13 02:27:40,705 INFO L78 Accepts]: Start accepts. Automaton has 21882 states and 25840 transitions. Word has length 283 [2021-11-13 02:27:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:40,705 INFO L470 AbstractCegarLoop]: Abstraction has 21882 states and 25840 transitions. [2021-11-13 02:27:40,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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) [2021-11-13 02:27:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21882 states and 25840 transitions. [2021-11-13 02:27:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-11-13 02:27:40,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:40,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:40,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 02:27:40,738 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1619391301, now seen corresponding path program 1 times [2021-11-13 02:27:40,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:40,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151900442] [2021-11-13 02:27:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:40,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 02:27:40,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:40,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151900442] [2021-11-13 02:27:40,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151900442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:40,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:40,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:40,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410301659] [2021-11-13 02:27:40,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:40,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:40,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:40,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:40,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:40,913 INFO L87 Difference]: Start difference. First operand 21882 states and 25840 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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) [2021-11-13 02:27:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:41,784 INFO L93 Difference]: Finished difference Result 42047 states and 49757 transitions. [2021-11-13 02:27:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:41,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 295 [2021-11-13 02:27:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:41,823 INFO L225 Difference]: With dead ends: 42047 [2021-11-13 02:27:41,823 INFO L226 Difference]: Without dead ends: 21882 [2021-11-13 02:27:41,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:41,834 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 534.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 634.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:41,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 103 Invalid, 437 Unknown, 0 Unchecked, 3.89ms Time], IncrementalHoareTripleChecker [1 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 634.66ms Time] [2021-11-13 02:27:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21882 states. [2021-11-13 02:27:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21882 to 21882. [2021-11-13 02:27:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21882 states, 21881 states have (on average 1.1807961244915681) internal successors, (25837), 21881 states have internal predecessors, (25837), 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) [2021-11-13 02:27:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21882 states to 21882 states and 25837 transitions. [2021-11-13 02:27:42,244 INFO L78 Accepts]: Start accepts. Automaton has 21882 states and 25837 transitions. Word has length 295 [2021-11-13 02:27:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:42,244 INFO L470 AbstractCegarLoop]: Abstraction has 21882 states and 25837 transitions. [2021-11-13 02:27:42,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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) [2021-11-13 02:27:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 21882 states and 25837 transitions. [2021-11-13 02:27:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-13 02:27:42,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:42,263 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:42,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 02:27:42,264 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1434596184, now seen corresponding path program 1 times [2021-11-13 02:27:42,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:42,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409704321] [2021-11-13 02:27:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:42,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 02:27:42,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:42,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409704321] [2021-11-13 02:27:42,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409704321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:42,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:42,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:27:42,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368778597] [2021-11-13 02:27:42,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:42,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:42,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:42,399 INFO L87 Difference]: Start difference. First operand 21882 states and 25837 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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) [2021-11-13 02:27:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:43,235 INFO L93 Difference]: Finished difference Result 48198 states and 57116 transitions. [2021-11-13 02:27:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:43,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 296 [2021-11-13 02:27:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:43,276 INFO L225 Difference]: With dead ends: 48198 [2021-11-13 02:27:43,276 INFO L226 Difference]: Without dead ends: 27747 [2021-11-13 02:27:43,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:27:43,293 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 539.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.96ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 657.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:43,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 106 Invalid, 578 Unknown, 0 Unchecked, 3.96ms Time], IncrementalHoareTripleChecker [10 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 657.54ms Time] [2021-11-13 02:27:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27747 states. [2021-11-13 02:27:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27747 to 25314. [2021-11-13 02:27:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25314 states, 25313 states have (on average 1.1895073677556987) internal successors, (30110), 25313 states have internal predecessors, (30110), 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) [2021-11-13 02:27:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25314 states to 25314 states and 30110 transitions. [2021-11-13 02:27:44,059 INFO L78 Accepts]: Start accepts. Automaton has 25314 states and 30110 transitions. Word has length 296 [2021-11-13 02:27:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:44,059 INFO L470 AbstractCegarLoop]: Abstraction has 25314 states and 30110 transitions. [2021-11-13 02:27:44,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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) [2021-11-13 02:27:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 25314 states and 30110 transitions. [2021-11-13 02:27:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-13 02:27:44,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:44,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:44,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 02:27:44,083 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:44,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:44,083 INFO L85 PathProgramCache]: Analyzing trace with hash 658723214, now seen corresponding path program 1 times [2021-11-13 02:27:44,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:44,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658154747] [2021-11-13 02:27:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:44,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:27:44,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:44,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658154747] [2021-11-13 02:27:44,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658154747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:44,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:27:44,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:27:44,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903312629] [2021-11-13 02:27:44,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:44,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:27:44,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:44,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:27:44,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:44,382 INFO L87 Difference]: Start difference. First operand 25314 states and 30110 transitions. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 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) [2021-11-13 02:27:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:45,907 INFO L93 Difference]: Finished difference Result 50627 states and 60372 transitions. [2021-11-13 02:27:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:27:45,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 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 317 [2021-11-13 02:27:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:45,937 INFO L225 Difference]: With dead ends: 50627 [2021-11-13 02:27:45,937 INFO L226 Difference]: Without dead ends: 27030 [2021-11-13 02:27:45,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:27:45,952 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 127 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 993.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.44ms SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1328.35ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:45,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 60 Invalid, 1014 Unknown, 0 Unchecked, 6.44ms Time], IncrementalHoareTripleChecker [188 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1328.35ms Time] [2021-11-13 02:27:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27030 states. [2021-11-13 02:27:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27030 to 25600. [2021-11-13 02:27:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25600 states, 25599 states have (on average 1.1916090472284073) internal successors, (30504), 25599 states have internal predecessors, (30504), 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) [2021-11-13 02:27:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25600 states to 25600 states and 30504 transitions. [2021-11-13 02:27:46,423 INFO L78 Accepts]: Start accepts. Automaton has 25600 states and 30504 transitions. Word has length 317 [2021-11-13 02:27:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:46,424 INFO L470 AbstractCegarLoop]: Abstraction has 25600 states and 30504 transitions. [2021-11-13 02:27:46,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 3 states have internal predecessors, (317), 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) [2021-11-13 02:27:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 25600 states and 30504 transitions. [2021-11-13 02:27:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-13 02:27:46,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:46,447 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:46,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 02:27:46,447 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1444703703, now seen corresponding path program 1 times [2021-11-13 02:27:46,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:46,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832546084] [2021-11-13 02:27:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:46,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 191 proven. 6 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-13 02:27:46,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:46,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832546084] [2021-11-13 02:27:46,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832546084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:46,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027508690] [2021-11-13 02:27:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:46,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:46,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:46,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:27:46,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 02:27:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:46,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:27:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-13 02:27:47,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-13 02:27:48,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027508690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:48,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:48,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-11-13 02:27:48,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142986608] [2021-11-13 02:27:48,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:48,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:48,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:48,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:48,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:48,567 INFO L87 Difference]: Start difference. First operand 25600 states and 30504 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 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) [2021-11-13 02:27:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:49,725 INFO L93 Difference]: Finished difference Result 52915 states and 63779 transitions. [2021-11-13 02:27:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 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 323 [2021-11-13 02:27:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:49,764 INFO L225 Difference]: With dead ends: 52915 [2021-11-13 02:27:49,764 INFO L226 Difference]: Without dead ends: 29032 [2021-11-13 02:27:49,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 643 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:49,778 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 91 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 587.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 732.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:49,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 86 Invalid, 556 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [180 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 732.70ms Time] [2021-11-13 02:27:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29032 states. [2021-11-13 02:27:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29032 to 28460. [2021-11-13 02:27:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28460 states, 28459 states have (on average 1.1749534417934573) internal successors, (33438), 28459 states have internal predecessors, (33438), 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) [2021-11-13 02:27:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28460 states to 28460 states and 33438 transitions. [2021-11-13 02:27:50,352 INFO L78 Accepts]: Start accepts. Automaton has 28460 states and 33438 transitions. Word has length 323 [2021-11-13 02:27:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:50,353 INFO L470 AbstractCegarLoop]: Abstraction has 28460 states and 33438 transitions. [2021-11-13 02:27:50,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 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) [2021-11-13 02:27:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28460 states and 33438 transitions. [2021-11-13 02:27:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-13 02:27:50,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:50,379 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:50,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-13 02:27:50,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 02:27:50,595 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:50,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:50,596 INFO L85 PathProgramCache]: Analyzing trace with hash -506750244, now seen corresponding path program 1 times [2021-11-13 02:27:50,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:50,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923502474] [2021-11-13 02:27:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:50,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 185 proven. 6 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-13 02:27:50,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:50,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923502474] [2021-11-13 02:27:50,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923502474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:50,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297536228] [2021-11-13 02:27:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:50,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:50,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:50,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:27:50,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 02:27:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:51,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:27:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-13 02:27:51,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-13 02:27:52,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297536228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:52,483 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:52,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2021-11-13 02:27:52,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417031729] [2021-11-13 02:27:52,484 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:52,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:27:52,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:27:52,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:52,486 INFO L87 Difference]: Start difference. First operand 28460 states and 33438 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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) [2021-11-13 02:27:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:53,380 INFO L93 Difference]: Finished difference Result 59493 states and 69997 transitions. [2021-11-13 02:27:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:27:53,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 332 [2021-11-13 02:27:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:53,546 INFO L225 Difference]: With dead ends: 59493 [2021-11-13 02:27:53,546 INFO L226 Difference]: Without dead ends: 32607 [2021-11-13 02:27:53,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 661 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:27:53,557 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 563.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.31ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 698.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:53,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 565 Unknown, 0 Unchecked, 3.31ms Time], IncrementalHoareTripleChecker [34 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 698.15ms Time] [2021-11-13 02:27:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32607 states. [2021-11-13 02:27:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32607 to 27888. [2021-11-13 02:27:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27888 states, 27887 states have (on average 1.173342417613942) internal successors, (32721), 27887 states have internal predecessors, (32721), 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) [2021-11-13 02:27:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27888 states to 27888 states and 32721 transitions. [2021-11-13 02:27:54,163 INFO L78 Accepts]: Start accepts. Automaton has 27888 states and 32721 transitions. Word has length 332 [2021-11-13 02:27:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:54,164 INFO L470 AbstractCegarLoop]: Abstraction has 27888 states and 32721 transitions. [2021-11-13 02:27:54,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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) [2021-11-13 02:27:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 27888 states and 32721 transitions. [2021-11-13 02:27:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-13 02:27:54,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:54,190 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:54,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-13 02:27:54,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:54,391 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:27:54,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:27:54,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1397345862, now seen corresponding path program 1 times [2021-11-13 02:27:54,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:27:54,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549043461] [2021-11-13 02:27:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:54,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:27:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 138 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-13 02:27:54,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:27:54,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549043461] [2021-11-13 02:27:54,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549043461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:27:54,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969726530] [2021-11-13 02:27:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:27:54,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:27:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:27:54,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:27:54,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:27:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:27:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:27:54,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:27:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-13 02:27:56,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:27:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-13 02:27:57,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969726530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:27:57,781 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:27:57,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2021-11-13 02:27:57,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317621895] [2021-11-13 02:27:57,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:27:57,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:27:57,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:27:57,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:27:57,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:27:57,792 INFO L87 Difference]: Start difference. First operand 27888 states and 32721 transitions. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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) [2021-11-13 02:27:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:27:59,150 INFO L93 Difference]: Finished difference Result 59779 states and 70174 transitions. [2021-11-13 02:27:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:27:59,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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 337 [2021-11-13 02:27:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:27:59,183 INFO L225 Difference]: With dead ends: 59779 [2021-11-13 02:27:59,183 INFO L226 Difference]: Without dead ends: 33322 [2021-11-13 02:27:59,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 671 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:27:59,196 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 248 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 960.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.08ms SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1147.75ms IncrementalHoareTripleChecker+Time [2021-11-13 02:27:59,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 95 Invalid, 958 Unknown, 0 Unchecked, 5.08ms Time], IncrementalHoareTripleChecker [189 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1147.75ms Time] [2021-11-13 02:27:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33322 states. [2021-11-13 02:27:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33322 to 31177. [2021-11-13 02:27:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31177 states, 31176 states have (on average 1.1581986143187066) internal successors, (36108), 31176 states have internal predecessors, (36108), 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) [2021-11-13 02:27:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31177 states to 31177 states and 36108 transitions. [2021-11-13 02:27:59,762 INFO L78 Accepts]: Start accepts. Automaton has 31177 states and 36108 transitions. Word has length 337 [2021-11-13 02:27:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:27:59,763 INFO L470 AbstractCegarLoop]: Abstraction has 31177 states and 36108 transitions. [2021-11-13 02:27:59,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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) [2021-11-13 02:27:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 31177 states and 36108 transitions. [2021-11-13 02:27:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-11-13 02:27:59,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:27:59,799 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:27:59,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-13 02:28:00,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:00,013 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash -254283576, now seen corresponding path program 1 times [2021-11-13 02:28:00,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:00,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663733453] [2021-11-13 02:28:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:00,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-13 02:28:00,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:00,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663733453] [2021-11-13 02:28:00,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663733453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:00,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:00,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:28:00,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352187610] [2021-11-13 02:28:00,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:00,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:00,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:00,193 INFO L87 Difference]: Start difference. First operand 31177 states and 36108 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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) [2021-11-13 02:28:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:01,658 INFO L93 Difference]: Finished difference Result 60923 states and 70623 transitions. [2021-11-13 02:28:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:01,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 382 [2021-11-13 02:28:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:01,689 INFO L225 Difference]: With dead ends: 60923 [2021-11-13 02:28:01,689 INFO L226 Difference]: Without dead ends: 31320 [2021-11-13 02:28:01,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:01,702 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 214 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 935.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.33ms SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1124.84ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:01,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 98 Invalid, 1018 Unknown, 0 Unchecked, 5.33ms Time], IncrementalHoareTripleChecker [210 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1124.84ms Time] [2021-11-13 02:28:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31320 states. [2021-11-13 02:28:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31320 to 30891. [2021-11-13 02:28:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30891 states, 30890 states have (on average 1.1581417934606668) internal successors, (35775), 30890 states have internal predecessors, (35775), 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) [2021-11-13 02:28:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30891 states to 30891 states and 35775 transitions. [2021-11-13 02:28:02,306 INFO L78 Accepts]: Start accepts. Automaton has 30891 states and 35775 transitions. Word has length 382 [2021-11-13 02:28:02,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:02,307 INFO L470 AbstractCegarLoop]: Abstraction has 30891 states and 35775 transitions. [2021-11-13 02:28:02,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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) [2021-11-13 02:28:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 30891 states and 35775 transitions. [2021-11-13 02:28:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-13 02:28:02,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:02,338 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:02,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 02:28:02,338 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:02,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2005583965, now seen corresponding path program 1 times [2021-11-13 02:28:02,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:02,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398720139] [2021-11-13 02:28:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:02,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-11-13 02:28:02,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:02,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398720139] [2021-11-13 02:28:02,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398720139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:02,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130078211] [2021-11-13 02:28:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:02,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:02,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:02,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 02:28:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:02,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:02,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-11-13 02:28:05,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-11-13 02:28:06,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130078211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:06,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:28:06,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2021-11-13 02:28:06,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413560177] [2021-11-13 02:28:06,462 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:06,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:06,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:06,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:06,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:28:06,465 INFO L87 Difference]: Start difference. First operand 30891 states and 35775 transitions. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 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) [2021-11-13 02:28:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:07,773 INFO L93 Difference]: Finished difference Result 62780 states and 72929 transitions. [2021-11-13 02:28:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:07,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 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 389 [2021-11-13 02:28:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:07,775 INFO L225 Difference]: With dead ends: 62780 [2021-11-13 02:28:07,775 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 02:28:07,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:28:07,792 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 930.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.66ms SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1106.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:07,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 20 Invalid, 1056 Unknown, 0 Unchecked, 4.66ms Time], IncrementalHoareTripleChecker [269 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 1106.66ms Time] [2021-11-13 02:28:07,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 02:28:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 02:28:07,793 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) [2021-11-13 02:28:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 02:28:07,794 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 389 [2021-11-13 02:28:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:07,794 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 02:28:07,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 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) [2021-11-13 02:28:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 02:28:07,795 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 02:28:07,798 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 02:28:07,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:08,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:08,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-13 02:28:15,024 WARN L227 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 506 DAG size of output: 502 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:28:20,116 WARN L227 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 506 DAG size of output: 502 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:28:26,541 INFO L858 garLoopResultBuilder]: For program point L498(lines 498 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,541 INFO L858 garLoopResultBuilder]: For program point L432(lines 432 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,541 INFO L858 garLoopResultBuilder]: For program point L366(lines 366 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,541 INFO L858 garLoopResultBuilder]: For program point L763(lines 763 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,541 INFO L858 garLoopResultBuilder]: For program point L632(lines 632 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,541 INFO L858 garLoopResultBuilder]: For program point L566(lines 566 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,541 INFO L858 garLoopResultBuilder]: For program point L302(lines 302 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,542 INFO L858 garLoopResultBuilder]: For program point L1293(lines 1293 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,542 INFO L858 garLoopResultBuilder]: For program point L1360(lines 1360 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,542 INFO L858 garLoopResultBuilder]: For program point L1162(lines 1162 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,542 INFO L858 garLoopResultBuilder]: For program point L105(lines 105 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,542 INFO L858 garLoopResultBuilder]: For program point L1096(lines 1096 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,542 INFO L858 garLoopResultBuilder]: For program point L1031(lines 1031 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,542 INFO L858 garLoopResultBuilder]: For program point L965(lines 965 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,543 INFO L858 garLoopResultBuilder]: For program point L899(lines 899 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,543 INFO L858 garLoopResultBuilder]: For program point L174(lines 174 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,543 INFO L858 garLoopResultBuilder]: For program point L835(lines 835 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,543 INFO L858 garLoopResultBuilder]: For program point L771(lines 771 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,543 INFO L858 garLoopResultBuilder]: For program point L507(lines 507 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,543 INFO L858 garLoopResultBuilder]: For program point L243(lines 243 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,543 INFO L858 garLoopResultBuilder]: For program point L1433(lines 1433 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,544 INFO L858 garLoopResultBuilder]: For program point L376(lines 376 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,544 INFO L858 garLoopResultBuilder]: For program point L311(lines 311 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,544 INFO L858 garLoopResultBuilder]: For program point L1236(lines 1236 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,544 INFO L858 garLoopResultBuilder]: For program point L576(lines 576 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,548 INFO L858 garLoopResultBuilder]: For program point L444(lines 444 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,548 INFO L858 garLoopResultBuilder]: For program point L1369(lines 1369 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,549 INFO L858 garLoopResultBuilder]: For program point L1105(lines 1105 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,549 INFO L858 garLoopResultBuilder]: For program point L643(lines 643 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,549 INFO L858 garLoopResultBuilder]: For program point L1172(lines 1172 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,549 INFO L858 garLoopResultBuilder]: For program point L115(lines 115 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,549 INFO L858 garLoopResultBuilder]: For program point L248(lines 248 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,550 INFO L858 garLoopResultBuilder]: For program point L182(lines 182 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,550 INFO L858 garLoopResultBuilder]: For program point L1041(lines 1041 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,550 INFO L858 garLoopResultBuilder]: For program point L909(lines 909 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,550 INFO L858 garLoopResultBuilder]: For program point L711(lines 711 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,550 INFO L858 garLoopResultBuilder]: For program point L976(lines 976 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,550 INFO L858 garLoopResultBuilder]: For program point L779(lines 779 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,551 INFO L858 garLoopResultBuilder]: For program point L846(lines 846 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,551 INFO L858 garLoopResultBuilder]: For program point L451(lines 451 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,551 INFO L858 garLoopResultBuilder]: For program point L1442(lines 1442 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,551 INFO L858 garLoopResultBuilder]: For program point L584(lines 584 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,551 INFO L858 garLoopResultBuilder]: For program point L1575-1(lines 64 1660) no Hoare annotation was computed. [2021-11-13 02:28:26,552 INFO L858 garLoopResultBuilder]: For program point L387(lines 387 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,552 INFO L858 garLoopResultBuilder]: For program point L1114(lines 1114 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,552 INFO L858 garLoopResultBuilder]: For program point L1048(lines 1048 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,552 INFO L858 garLoopResultBuilder]: For program point L322(lines 322 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,552 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-13 02:28:26,553 INFO L858 garLoopResultBuilder]: For program point L1247(lines 1247 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,553 INFO L858 garLoopResultBuilder]: For program point L124(lines 124 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,553 INFO L858 garLoopResultBuilder]: For program point L917(lines 917 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,553 INFO L858 garLoopResultBuilder]: For program point L719(lines 719 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,553 INFO L858 garLoopResultBuilder]: For program point L653(lines 653 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,554 INFO L858 garLoopResultBuilder]: For program point L1578-1(lines 64 1660) no Hoare annotation was computed. [2021-11-13 02:28:26,554 INFO L858 garLoopResultBuilder]: For program point L191(lines 191 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,554 INFO L858 garLoopResultBuilder]: For program point L1579(line 1579) no Hoare annotation was computed. [2021-11-13 02:28:26,554 INFO L858 garLoopResultBuilder]: For program point L1315(lines 1315 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,554 INFO L858 garLoopResultBuilder]: For program point L258(lines 258 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,554 INFO L858 garLoopResultBuilder]: For program point L1183(lines 1183 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,555 INFO L858 garLoopResultBuilder]: For program point L985(lines 985 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,555 INFO L858 garLoopResultBuilder]: For program point L787(lines 787 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,555 INFO L858 garLoopResultBuilder]: For program point L523(lines 523 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,555 INFO L858 garLoopResultBuilder]: For program point L854(lines 854 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,555 INFO L858 garLoopResultBuilder]: For program point L460(lines 460 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,555 INFO L858 garLoopResultBuilder]: For program point L593(lines 593 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,556 INFO L858 garLoopResultBuilder]: For program point L1452(lines 1452 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,556 INFO L858 garLoopResultBuilder]: For program point L329(lines 329 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,556 INFO L858 garLoopResultBuilder]: For program point L1122(lines 1122 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,556 INFO L858 garLoopResultBuilder]: For program point L65(lines 65 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,556 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 1579) no Hoare annotation was computed. [2021-11-13 02:28:26,557 INFO L858 garLoopResultBuilder]: For program point L794(lines 794 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,557 INFO L858 garLoopResultBuilder]: For program point L1323(lines 1323 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,557 INFO L858 garLoopResultBuilder]: For program point L993(lines 993 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,557 INFO L858 garLoopResultBuilder]: For program point L927(lines 927 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,557 INFO L858 garLoopResultBuilder]: For program point L663(lines 663 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,557 INFO L858 garLoopResultBuilder]: For program point L267(lines 267 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,558 INFO L858 garLoopResultBuilder]: For program point L201(lines 201 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,558 INFO L858 garLoopResultBuilder]: For program point L1192(lines 1192 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,558 INFO L858 garLoopResultBuilder]: For program point L532(lines 532 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,558 INFO L858 garLoopResultBuilder]: For program point L1391(lines 1391 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,558 INFO L858 garLoopResultBuilder]: For program point L1259(lines 1259 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,559 INFO L858 garLoopResultBuilder]: For program point L136(lines 136 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,559 INFO L858 garLoopResultBuilder]: For program point L863(lines 863 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,559 INFO L858 garLoopResultBuilder]: For program point L468(lines 468 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,559 INFO L858 garLoopResultBuilder]: For program point L1130(lines 1130 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,559 INFO L858 garLoopResultBuilder]: For program point L668(lines 668 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,560 INFO L854 garLoopResultBuilder]: At program point L1659(lines 64 1660) the Hoare annotation is: (let ((.cse1 (= ~a3~0 0)) (.cse0 (= ~a5~0 1))) (or (and .cse0 (= ~a6~0 0) (= ~a27~0 1)) (and (= ~a26~0 1) .cse0 (= ~a12~0 1) .cse1) (and .cse0 (<= 1 ~a3~0)) (and .cse0 (<= ~a26~0 0) .cse1) (and .cse0 (= ~a11~0 1)) (and .cse0 (= ~a6~0 1)))) [2021-11-13 02:28:26,560 INFO L858 garLoopResultBuilder]: For program point L602(lines 602 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,560 INFO L858 garLoopResultBuilder]: For program point L1462(lines 1462 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,560 INFO L858 garLoopResultBuilder]: For program point L339(lines 339 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,561 INFO L858 garLoopResultBuilder]: For program point L1331(lines 1331 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,561 INFO L861 garLoopResultBuilder]: At program point L1662(lines 1662 1679) the Hoare annotation is: true [2021-11-13 02:28:26,561 INFO L858 garLoopResultBuilder]: For program point L539(lines 539 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,561 INFO L858 garLoopResultBuilder]: For program point L407(lines 407 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,561 INFO L858 garLoopResultBuilder]: For program point L275(lines 275 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,562 INFO L858 garLoopResultBuilder]: For program point L1200(lines 1200 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,562 INFO L858 garLoopResultBuilder]: For program point L805(lines 805 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,562 INFO L858 garLoopResultBuilder]: For program point L145(lines 145 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,562 INFO L858 garLoopResultBuilder]: For program point L1004(lines 1004 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,562 INFO L858 garLoopResultBuilder]: For program point L1137(lines 1137 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,562 INFO L858 garLoopResultBuilder]: For program point L1071(lines 1071 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,563 INFO L858 garLoopResultBuilder]: For program point L873(lines 873 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,563 INFO L858 garLoopResultBuilder]: For program point L675(lines 675 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,563 INFO L858 garLoopResultBuilder]: For program point L477(lines 477 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,563 INFO L858 garLoopResultBuilder]: For program point L1336(lines 1336 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,563 INFO L858 garLoopResultBuilder]: For program point L743(lines 743 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,565 INFO L854 garLoopResultBuilder]: At program point L1668-2(lines 1668 1678) the Hoare annotation is: (let ((.cse1 (= ~a3~0 0)) (.cse0 (= ~a5~0 1))) (or (and .cse0 (= ~a6~0 0) (= ~a27~0 1)) (and (= ~a26~0 1) .cse0 (= ~a12~0 1) .cse1) (and .cse0 (<= 1 ~a3~0)) (and .cse0 (<= ~a26~0 0) .cse1) (and .cse0 (= ~a11~0 1)) (and .cse0 (= ~a6~0 1)))) [2021-11-13 02:28:26,565 INFO L858 garLoopResultBuilder]: For program point L1470(lines 1470 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,565 INFO L858 garLoopResultBuilder]: For program point L83(lines 83 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,566 INFO L858 garLoopResultBuilder]: For program point L613(lines 613 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,566 INFO L858 garLoopResultBuilder]: For program point L415(lines 415 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,566 INFO L858 garLoopResultBuilder]: For program point L349(lines 349 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,566 INFO L858 garLoopResultBuilder]: For program point L1142(lines 1142 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,566 INFO L858 garLoopResultBuilder]: For program point L1076(lines 1076 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,567 INFO L858 garLoopResultBuilder]: For program point L878(lines 878 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,567 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-13 02:28:26,567 INFO L858 garLoopResultBuilder]: For program point L549(lines 549 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,567 INFO L858 garLoopResultBuilder]: For program point L1210(lines 1210 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,567 INFO L858 garLoopResultBuilder]: For program point L814(lines 814 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,568 INFO L858 garLoopResultBuilder]: For program point L1673(line 1673) no Hoare annotation was computed. [2021-11-13 02:28:26,568 INFO L858 garLoopResultBuilder]: For program point L286(lines 286 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,568 INFO L858 garLoopResultBuilder]: For program point L1013(lines 1013 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,568 INFO L858 garLoopResultBuilder]: For program point L947(lines 947 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,568 INFO L858 garLoopResultBuilder]: For program point L156(lines 156 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,568 INFO L858 garLoopResultBuilder]: For program point L685(lines 685 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L1412(lines 1412 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L1346(lines 1346 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L223(lines 223 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L92(lines 92 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L753(lines 753 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L1084(lines 1084 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L556(lines 556 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L490(lines 490 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L424(lines 424 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,569 INFO L858 garLoopResultBuilder]: For program point L358(lines 358 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,570 INFO L858 garLoopResultBuilder]: For program point L1284(lines 1284 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,570 INFO L858 garLoopResultBuilder]: For program point L1152(lines 1152 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,570 INFO L858 garLoopResultBuilder]: For program point L624(lines 624 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,570 INFO L858 garLoopResultBuilder]: For program point L294(lines 294 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,570 INFO L858 garLoopResultBuilder]: For program point L1021(lines 1021 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,570 INFO L858 garLoopResultBuilder]: For program point L823(lines 823 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,571 INFO L858 garLoopResultBuilder]: For program point L1220(lines 1220 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,571 INFO L858 garLoopResultBuilder]: For program point L957(lines 957 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,571 INFO L858 garLoopResultBuilder]: For program point L1354(lines 1354 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,571 INFO L858 garLoopResultBuilder]: For program point L165(lines 165 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,571 INFO L858 garLoopResultBuilder]: For program point L99(lines 99 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,571 INFO L858 garLoopResultBuilder]: For program point L694(lines 694 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,572 INFO L858 garLoopResultBuilder]: For program point L232(lines 232 1475) no Hoare annotation was computed. [2021-11-13 02:28:26,575 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:26,577 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 02:28:26,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 02:28:26 BoogieIcfgContainer [2021-11-13 02:28:26,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 02:28:26,597 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 02:28:26,597 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 02:28:26,598 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 02:28:26,598 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:27:16" (3/4) ... [2021-11-13 02:28:26,602 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 02:28:26,644 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 125 nodes and edges [2021-11-13 02:28:26,650 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-11-13 02:28:26,655 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-13 02:28:26,660 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-13 02:28:26,909 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-13 02:28:26,909 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 02:28:26,910 INFO L158 Benchmark]: Toolchain (without parser) took 74765.63ms. Allocated memory was 127.9MB in the beginning and 6.4GB in the end (delta: 6.3GB). Free memory was 104.3MB in the beginning and 3.2GB in the end (delta: -3.1GB). Peak memory consumption was 3.2GB. Max. memory is 16.1GB. [2021-11-13 02:28:26,910 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory is still 67.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:28:26,911 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1401.97ms. Allocated memory is still 127.9MB. Free memory was 103.9MB in the beginning and 85.3MB in the end (delta: 18.6MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. [2021-11-13 02:28:26,911 INFO L158 Benchmark]: Boogie Procedure Inliner took 167.62ms. Allocated memory is still 127.9MB. Free memory was 85.3MB in the beginning and 70.8MB in the end (delta: 14.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-13 02:28:26,912 INFO L158 Benchmark]: Boogie Preprocessor took 178.47ms. Allocated memory is still 127.9MB. Free memory was 70.8MB in the beginning and 60.8MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 02:28:26,912 INFO L158 Benchmark]: RCFGBuilder took 2714.54ms. Allocated memory was 127.9MB in the beginning and 213.9MB in the end (delta: 86.0MB). Free memory was 60.8MB in the beginning and 100.5MB in the end (delta: -39.7MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. [2021-11-13 02:28:26,913 INFO L158 Benchmark]: TraceAbstraction took 69982.91ms. Allocated memory was 213.9MB in the beginning and 6.4GB in the end (delta: 6.2GB). Free memory was 99.5MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 4.5GB. Max. memory is 16.1GB. [2021-11-13 02:28:26,913 INFO L158 Benchmark]: Witness Printer took 312.02ms. Allocated memory is still 6.4GB. Free memory was 3.3GB in the beginning and 3.2GB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2021-11-13 02:28:26,916 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory is still 67.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1401.97ms. Allocated memory is still 127.9MB. Free memory was 103.9MB in the beginning and 85.3MB in the end (delta: 18.6MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 167.62ms. Allocated memory is still 127.9MB. Free memory was 85.3MB in the beginning and 70.8MB in the end (delta: 14.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 178.47ms. Allocated memory is still 127.9MB. Free memory was 70.8MB in the beginning and 60.8MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 2714.54ms. Allocated memory was 127.9MB in the beginning and 213.9MB in the end (delta: 86.0MB). Free memory was 60.8MB in the beginning and 100.5MB in the end (delta: -39.7MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. * TraceAbstraction took 69982.91ms. Allocated memory was 213.9MB in the beginning and 6.4GB in the end (delta: 6.2GB). Free memory was 99.5MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 4.5GB. Max. memory is 16.1GB. * Witness Printer took 312.02ms. Allocated memory is still 6.4GB. Free memory was 3.3GB in the beginning and 3.2GB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 1579]: 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 CFG has 1 procedures, 148 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 69.9s, OverallIterations: 22, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.5s, AutomataDifference: 23.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 18.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2636 SdHoareTripleChecker+Valid, 19080.38ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2636 mSDsluCounter, 2311 SdHoareTripleChecker+Invalid, 15597.21ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 122 mSDsCounter, 2395 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11651 IncrementalHoareTripleChecker+Invalid, 14046 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2395 mSolverCounterUnsat, 2190 mSDtfsCounter, 11651 mSolverCounterSat, 107.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3706 GetRequests, 3664 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31177occurred in iteration=20, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 12590 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 485 NumberOfFragments, 111 HoareAnnotationTreeSize, 3 FomulaSimplifications, 4338 FormulaSimplificationTreeSizeReduction, 12.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 24958 FormulaSimplificationTreeSizeReductionInter, 6.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 15.0s InterpolantComputationTime, 7406 NumberOfCodeBlocks, 7280 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 9203 ConstructedInterpolants, 0 QuantifiedInterpolants, 24940 SizeOfPredicates, 14 NumberOfNonLiveVariables, 3372 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 34 InterpolantComputations, 28 PerfectInterpolantSequences, 7257/7293 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 - InvariantResult [Line: 1662]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: ((((((a5 == 1 && a6 == 0) && a27 == 1) || (((a26 == 1 && a5 == 1) && a12 == 1) && a3 == 0)) || (a5 == 1 && 1 <= a3)) || ((a5 == 1 && a26 <= 0) && a3 == 0)) || (a5 == 1 && a11 == 1)) || (a5 == 1 && a6 == 1) - InvariantResult [Line: 1668]: Loop Invariant Derived loop invariant: ((((((a5 == 1 && a6 == 0) && a27 == 1) || (((a26 == 1 && a5 == 1) && a12 == 1) && a3 == 0)) || (a5 == 1 && 1 <= a3)) || ((a5 == 1 && a26 <= 0) && a3 == 0)) || (a5 == 1 && a11 == 1)) || (a5 == 1 && a6 == 1) RESULT: Ultimate proved your program to be correct! [2021-11-13 02:28:26,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf59b225-05e2-4cc8-8f84-db9c425e3dce/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE