./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.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_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/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_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/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_5dad5c26-7113-43a3-a599-ff612c9d7532/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 a7e5f5a1db53b7a411af936e12a734750394ab6a9f7be60b4c793a1fb07a048c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:09:55,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:09:55,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:09:55,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:09:55,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:09:55,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:09:55,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:09:55,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:09:55,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:09:55,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:09:55,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:09:55,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:09:55,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:09:55,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:09:55,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:09:55,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:09:55,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:09:55,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:09:55,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:09:55,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:09:55,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:09:55,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:09:55,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:09:55,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:09:55,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:09:55,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:09:55,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:09:55,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:09:55,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:09:55,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:09:55,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:09:55,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:09:55,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:09:55,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:09:55,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:09:55,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:09:55,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:09:55,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:09:55,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:09:55,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:09:55,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:09:55,182 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:09:55,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:09:55,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:09:55,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:09:55,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:09:55,233 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:09:55,233 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:09:55,233 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:09:55,234 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:09:55,237 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:09:55,238 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:09:55,239 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:09:55,239 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:09:55,239 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:09:55,240 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:09:55,240 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:09:55,240 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:09:55,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:09:55,241 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:09:55,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:09:55,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:09:55,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:09:55,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:09:55,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:09:55,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:09:55,243 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:09:55,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:09:55,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:09:55,243 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:09:55,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:09:55,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:09:55,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:09:55,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:09:55,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:09:55,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:09:55,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:09:55,245 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:09:55,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:09:55,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:09:55,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:09:55,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:09:55,246 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_5dad5c26-7113-43a3-a599-ff612c9d7532/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7e5f5a1db53b7a411af936e12a734750394ab6a9f7be60b4c793a1fb07a048c [2021-11-12 23:09:55,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:09:55,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:09:55,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:09:55,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:09:55,561 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:09:55,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c [2021-11-12 23:09:55,630 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/data/4502c5f1e/94d0a7719e364758b711957eca843b26/FLAGe019ac2eb [2021-11-12 23:09:56,663 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:09:56,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c [2021-11-12 23:09:56,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/data/4502c5f1e/94d0a7719e364758b711957eca843b26/FLAGe019ac2eb [2021-11-12 23:09:56,978 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/data/4502c5f1e/94d0a7719e364758b711957eca843b26 [2021-11-12 23:09:56,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:09:56,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:09:56,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:09:56,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:09:56,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:09:56,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:09:56" (1/1) ... [2021-11-12 23:09:56,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70df38f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:09:56, skipping insertion in model container [2021-11-12 23:09:56,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:09:56" (1/1) ... [2021-11-12 23:09:57,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:09:57,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:09:59,853 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_5dad5c26-7113-43a3-a599-ff612c9d7532/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c[375709,375722] [2021-11-12 23:09:59,892 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_5dad5c26-7113-43a3-a599-ff612c9d7532/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c[383339,383352] [2021-11-12 23:10:00,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:10:00,215 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:10:01,507 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_5dad5c26-7113-43a3-a599-ff612c9d7532/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c[375709,375722] [2021-11-12 23:10:01,518 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_5dad5c26-7113-43a3-a599-ff612c9d7532/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c[383339,383352] [2021-11-12 23:10:01,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:10:01,648 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:10:01,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01 WrapperNode [2021-11-12 23:10:01,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:10:01,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:10:01,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:10:01,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:10:01,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:01,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:02,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:10:02,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:10:02,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:10:02,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:10:02,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:02,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:02,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:02,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:02,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:02,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:02,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:02,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:10:02,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:10:02,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:10:02,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:10:02,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (1/1) ... [2021-11-12 23:10:02,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:10:02,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:10:02,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:10:02,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:10:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:10:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 23:10:02,806 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 23:10:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 23:10:02,806 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 23:10:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 23:10:02,807 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 23:10:02,807 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 23:10:02,807 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 23:10:02,807 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 23:10:02,807 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 23:10:02,807 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 23:10:02,807 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 23:10:02,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:10:02,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:10:02,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:10:13,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:10:13,120 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-12 23:10:13,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:10:13 BoogieIcfgContainer [2021-11-12 23:10:13,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:10:13,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:10:13,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:10:13,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:10:13,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:09:56" (1/3) ... [2021-11-12 23:10:13,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4e7c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:10:13, skipping insertion in model container [2021-11-12 23:10:13,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:10:01" (2/3) ... [2021-11-12 23:10:13,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4e7c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:10:13, skipping insertion in model container [2021-11-12 23:10:13,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:10:13" (3/3) ... [2021-11-12 23:10:13,134 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.10.cil-2.c [2021-11-12 23:10:13,139 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:10:13,140 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:10:13,197 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:10:13,204 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 [2021-11-12 23:10:13,204 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:10:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-12 23:10:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:10:13,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:13,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:13,276 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:13,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1349524805, now seen corresponding path program 1 times [2021-11-12 23:10:13,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:13,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261065948] [2021-11-12 23:10:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:13,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:10:13,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:13,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261065948] [2021-11-12 23:10:13,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261065948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:13,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:13,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:10:13,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090541873] [2021-11-12 23:10:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:13,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:10:13,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:13,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:10:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:10:13,813 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:10:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:14,985 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2021-11-12 23:10:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:10:14,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-12 23:10:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:15,021 INFO L225 Difference]: With dead ends: 3767 [2021-11-12 23:10:15,022 INFO L226 Difference]: Without dead ends: 1957 [2021-11-12 23:10:15,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:10:15,035 INFO L933 BasicCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 709.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.10ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 911.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:15,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 39.10ms Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 911.68ms Time] [2021-11-12 23:10:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-11-12 23:10:15,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2021-11-12 23:10:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-12 23:10:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2021-11-12 23:10:15,222 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2021-11-12 23:10:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:15,223 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2021-11-12 23:10:15,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:10:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2021-11-12 23:10:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:10:15,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:15,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:15,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:10:15,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash -524350286, now seen corresponding path program 1 times [2021-11-12 23:10:15,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:15,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728556319] [2021-11-12 23:10:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:15,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:10:15,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:15,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728556319] [2021-11-12 23:10:15,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728556319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:15,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411752390] [2021-11-12 23:10:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:15,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:15,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:10:15,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:10:15,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:10:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:15,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:10:15,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:10:16,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411752390] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:16,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:10:16,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:10:16,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684809526] [2021-11-12 23:10:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:16,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:16,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:16,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:16,240 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:16,735 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2021-11-12 23:10:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:16,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:10:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:16,763 INFO L225 Difference]: With dead ends: 2569 [2021-11-12 23:10:16,763 INFO L226 Difference]: Without dead ends: 2259 [2021-11-12 23:10:16,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:16,767 INFO L933 BasicCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 308.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.89ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 370.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:16,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 15.89ms Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 370.32ms Time] [2021-11-12 23:10:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-11-12 23:10:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2021-11-12 23:10:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-12 23:10:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2021-11-12 23:10:16,894 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2021-11-12 23:10:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:16,895 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2021-11-12 23:10:16,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2021-11-12 23:10:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:10:16,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:16,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:16,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:17,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:17,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1739153170, now seen corresponding path program 1 times [2021-11-12 23:10:17,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:17,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100199436] [2021-11-12 23:10:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:17,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:10:17,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:17,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100199436] [2021-11-12 23:10:17,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100199436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:17,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047910255] [2021-11-12 23:10:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:17,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:17,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:10:17,257 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:10:17,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:10:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:10:17,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:10:17,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047910255] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:17,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:10:17,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:10:17,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500981363] [2021-11-12 23:10:17,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:17,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:17,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:17,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:17,982 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:18,522 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2021-11-12 23:10:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:18,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:10:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:18,545 INFO L225 Difference]: With dead ends: 3460 [2021-11-12 23:10:18,545 INFO L226 Difference]: Without dead ends: 2851 [2021-11-12 23:10:18,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:18,551 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 333.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.35ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 404.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:18,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 15.35ms Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 404.52ms Time] [2021-11-12 23:10:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-11-12 23:10:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2021-11-12 23:10:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2021-11-12 23:10:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2021-11-12 23:10:18,698 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2021-11-12 23:10:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:18,699 INFO L470 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2021-11-12 23:10:18,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2021-11-12 23:10:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:10:18,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:18,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:18,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:18,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:18,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1221271922, now seen corresponding path program 1 times [2021-11-12 23:10:18,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:18,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093666607] [2021-11-12 23:10:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:18,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:10:19,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:19,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093666607] [2021-11-12 23:10:19,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093666607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:19,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866581168] [2021-11-12 23:10:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:19,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:19,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:10:19,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:10:19,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:10:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:19,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:10:19,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:10:19,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866581168] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:19,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:10:19,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:10:19,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028272618] [2021-11-12 23:10:19,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:19,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:19,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:19,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:19,778 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:20,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:20,392 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2021-11-12 23:10:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:10:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:20,423 INFO L225 Difference]: With dead ends: 5218 [2021-11-12 23:10:20,423 INFO L226 Difference]: Without dead ends: 4019 [2021-11-12 23:10:20,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:20,432 INFO L933 BasicCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 306.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 108.47ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 367.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:20,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 108.47ms Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 367.69ms Time] [2021-11-12 23:10:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2021-11-12 23:10:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2021-11-12 23:10:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2021-11-12 23:10:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2021-11-12 23:10:20,623 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2021-11-12 23:10:20,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:20,624 INFO L470 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2021-11-12 23:10:20,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2021-11-12 23:10:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:10:20,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:20,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:20,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:20,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:20,855 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:20,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:20,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1550425042, now seen corresponding path program 1 times [2021-11-12 23:10:20,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:20,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112939004] [2021-11-12 23:10:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:20,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:10:20,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:20,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112939004] [2021-11-12 23:10:20,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112939004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:20,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890288186] [2021-11-12 23:10:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:20,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:20,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:10:20,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:10:21,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:10:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:21,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:10:21,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:10:21,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890288186] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:21,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:10:21,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:10:21,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765091031] [2021-11-12 23:10:21,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:21,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:21,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:21,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:21,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:21,654 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:22,256 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2021-11-12 23:10:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:10:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:22,306 INFO L225 Difference]: With dead ends: 8686 [2021-11-12 23:10:22,306 INFO L226 Difference]: Without dead ends: 6323 [2021-11-12 23:10:22,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:22,322 INFO L933 BasicCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 314.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.95ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 374.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:22,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 9.95ms Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 374.80ms Time] [2021-11-12 23:10:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2021-11-12 23:10:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2021-11-12 23:10:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2021-11-12 23:10:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2021-11-12 23:10:22,670 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2021-11-12 23:10:22,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:22,670 INFO L470 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2021-11-12 23:10:22,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2021-11-12 23:10:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:10:22,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:22,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:22,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:22,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:22,906 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:22,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1940686194, now seen corresponding path program 1 times [2021-11-12 23:10:22,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:22,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309208834] [2021-11-12 23:10:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:22,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:10:23,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:23,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309208834] [2021-11-12 23:10:23,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309208834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:23,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548347050] [2021-11-12 23:10:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:23,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:23,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:10:23,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:10:23,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:10:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:23,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:10:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:10:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:10:23,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:10:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:10:23,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548347050] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:10:23,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:10:23,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-12 23:10:23,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092930435] [2021-11-12 23:10:23,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:23,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:10:23,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:23,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:10:23,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:23,685 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:24,531 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2021-11-12 23:10:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:10:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-12 23:10:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:24,622 INFO L225 Difference]: With dead ends: 15526 [2021-11-12 23:10:24,622 INFO L226 Difference]: Without dead ends: 10867 [2021-11-12 23:10:24,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:10:24,647 INFO L933 BasicCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.94ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 383.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:24,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 8.94ms Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 383.06ms Time] [2021-11-12 23:10:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2021-11-12 23:10:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2021-11-12 23:10:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2021-11-12 23:10:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2021-11-12 23:10:25,194 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2021-11-12 23:10:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:25,196 INFO L470 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2021-11-12 23:10:25,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:10:25,197 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2021-11-12 23:10:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:10:25,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:25,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:25,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:10:25,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dad5c26-7113-43a3-a599-ff612c9d7532/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:10:25,446 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash 946311122, now seen corresponding path program 1 times [2021-11-12 23:10:25,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:25,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985347147] [2021-11-12 23:10:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:25,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:10:25,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:25,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985347147] [2021-11-12 23:10:25,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985347147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:25,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:25,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:10:25,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071406135] [2021-11-12 23:10:25,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:25,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:10:25,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:10:25,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:10:25,613 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:27,467 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2021-11-12 23:10:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:10:27,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2021-11-12 23:10:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:27,562 INFO L225 Difference]: With dead ends: 26597 [2021-11-12 23:10:27,562 INFO L226 Difference]: Without dead ends: 17411 [2021-11-12 23:10:27,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:10:27,599 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 4078 mSDsluCounter, 7080 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 884.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4084 SdHoareTripleChecker+Valid, 9870 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.40ms SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1035.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:27,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4084 Valid, 9870 Invalid, 1045 Unknown, 0 Unchecked, 33.40ms Time], IncrementalHoareTripleChecker [130 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1035.16ms Time] [2021-11-12 23:10:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2021-11-12 23:10:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2021-11-12 23:10:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2021-11-12 23:10:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2021-11-12 23:10:28,443 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2021-11-12 23:10:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:28,444 INFO L470 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2021-11-12 23:10:28,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2021-11-12 23:10:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:10:28,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:28,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:28,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:10:28,483 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:28,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1797541829, now seen corresponding path program 1 times [2021-11-12 23:10:28,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:28,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62810721] [2021-11-12 23:10:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:28,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:10:28,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:28,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62810721] [2021-11-12 23:10:28,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62810721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:28,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:28,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:10:28,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673564299] [2021-11-12 23:10:28,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:28,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:10:28,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:10:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:10:28,663 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:30,885 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2021-11-12 23:10:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:10:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2021-11-12 23:10:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:31,020 INFO L225 Difference]: With dead ends: 36973 [2021-11-12 23:10:31,021 INFO L226 Difference]: Without dead ends: 23323 [2021-11-12 23:10:31,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:10:31,091 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 3994 mSDsluCounter, 6996 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 711.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4000 SdHoareTripleChecker+Valid, 9771 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.75ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 868.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:31,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4000 Valid, 9771 Invalid, 1035 Unknown, 0 Unchecked, 38.75ms Time], IncrementalHoareTripleChecker [142 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 868.16ms Time] [2021-11-12 23:10:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2021-11-12 23:10:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2021-11-12 23:10:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2021-11-12 23:10:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2021-11-12 23:10:32,597 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2021-11-12 23:10:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:32,598 INFO L470 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2021-11-12 23:10:32,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2021-11-12 23:10:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:10:32,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:32,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:32,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:10:32,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1844796170, now seen corresponding path program 1 times [2021-11-12 23:10:32,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:32,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222223935] [2021-11-12 23:10:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:32,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:10:32,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:32,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222223935] [2021-11-12 23:10:32,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222223935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:32,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:32,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:10:32,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980059031] [2021-11-12 23:10:32,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:32,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:10:32,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:10:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:10:32,807 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:36,241 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2021-11-12 23:10:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:10:36,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2021-11-12 23:10:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:36,525 INFO L225 Difference]: With dead ends: 72237 [2021-11-12 23:10:36,526 INFO L226 Difference]: Without dead ends: 51955 [2021-11-12 23:10:36,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:10:36,578 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 4162 mSDsluCounter, 10418 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 760.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4181 SdHoareTripleChecker+Valid, 12957 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.51ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 923.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:36,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4181 Valid, 12957 Invalid, 1325 Unknown, 0 Unchecked, 36.51ms Time], IncrementalHoareTripleChecker [134 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 923.95ms Time] [2021-11-12 23:10:36,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2021-11-12 23:10:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2021-11-12 23:10:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2021-11-12 23:10:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2021-11-12 23:10:39,063 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2021-11-12 23:10:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:39,063 INFO L470 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2021-11-12 23:10:39,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2021-11-12 23:10:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:10:39,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:39,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:39,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:10:39,152 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash -44645213, now seen corresponding path program 1 times [2021-11-12 23:10:39,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:39,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365193720] [2021-11-12 23:10:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:39,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:10:39,289 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:39,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365193720] [2021-11-12 23:10:39,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365193720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:39,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:39,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:10:39,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601976460] [2021-11-12 23:10:39,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:39,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:10:39,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:10:39,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:10:39,292 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:43,325 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2021-11-12 23:10:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:10:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2021-11-12 23:10:43,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:43,631 INFO L225 Difference]: With dead ends: 108861 [2021-11-12 23:10:43,631 INFO L226 Difference]: Without dead ends: 69163 [2021-11-12 23:10:43,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:10:43,715 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 4081 mSDsluCounter, 7044 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 612.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 9811 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.70ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 747.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:43,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 9811 Invalid, 1043 Unknown, 0 Unchecked, 21.70ms Time], IncrementalHoareTripleChecker [142 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 747.96ms Time] [2021-11-12 23:10:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2021-11-12 23:10:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2021-11-12 23:10:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2021-11-12 23:10:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2021-11-12 23:10:47,262 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2021-11-12 23:10:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:47,264 INFO L470 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2021-11-12 23:10:47,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2021-11-12 23:10:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:10:47,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:47,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:47,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:10:47,332 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash 728374926, now seen corresponding path program 1 times [2021-11-12 23:10:47,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:47,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008072263] [2021-11-12 23:10:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:47,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:10:47,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:47,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008072263] [2021-11-12 23:10:47,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008072263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:47,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:47,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:10:47,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073028390] [2021-11-12 23:10:47,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:47,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:10:47,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:47,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:10:47,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:10:47,493 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:53,256 INFO L93 Difference]: Finished difference Result 157785 states and 232457 transitions. [2021-11-12 23:10:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:10:53,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2021-11-12 23:10:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:53,733 INFO L225 Difference]: With dead ends: 157785 [2021-11-12 23:10:53,733 INFO L226 Difference]: Without dead ends: 98815 [2021-11-12 23:10:53,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:10:53,871 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 4006 mSDsluCounter, 10454 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1055.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4012 SdHoareTripleChecker+Valid, 12983 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.38ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1208.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:53,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4012 Valid, 12983 Invalid, 1330 Unknown, 0 Unchecked, 24.38ms Time], IncrementalHoareTripleChecker [142 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1208.47ms Time] [2021-11-12 23:10:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98815 states. [2021-11-12 23:10:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98815 to 89237. [2021-11-12 23:10:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89237 states, 74759 states have (on average 1.4623924878609933) internal successors, (109327), 75085 states have internal predecessors, (109327), 10588 states have call successors, (10588), 3888 states have call predecessors, (10588), 3888 states have return successors, (10588), 10264 states have call predecessors, (10588), 10588 states have call successors, (10588) [2021-11-12 23:10:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89237 states to 89237 states and 130503 transitions. [2021-11-12 23:10:58,816 INFO L78 Accepts]: Start accepts. Automaton has 89237 states and 130503 transitions. Word has length 126 [2021-11-12 23:10:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:10:58,817 INFO L470 AbstractCegarLoop]: Abstraction has 89237 states and 130503 transitions. [2021-11-12 23:10:58,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 23:10:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 89237 states and 130503 transitions. [2021-11-12 23:10:59,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:10:59,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:10:59,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:10:59,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:10:59,269 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:10:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:10:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash 604443011, now seen corresponding path program 1 times [2021-11-12 23:10:59,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:10:59,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888282044] [2021-11-12 23:10:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:10:59,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:10:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:10:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-12 23:10:59,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:10:59,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888282044] [2021-11-12 23:10:59,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888282044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:10:59,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:10:59,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:10:59,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828975711] [2021-11-12 23:10:59,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:10:59,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:10:59,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:10:59,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:10:59,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:10:59,380 INFO L87 Difference]: Start difference. First operand 89237 states and 130503 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)