./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8 --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 f6768ec4cb10c0d030986cdc2e459713dbcdaadd .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:01:22,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:01:22,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:01:22,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:01:22,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:01:22,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:01:22,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:01:22,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:01:22,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:01:22,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:01:22,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:01:22,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:01:22,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:01:22,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:01:22,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:01:22,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:01:22,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:01:22,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:01:22,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:01:22,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:01:22,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:01:22,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:01:22,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:01:22,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:01:22,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:01:22,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:01:22,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:01:22,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:01:22,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:01:22,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:01:22,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:01:22,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:01:22,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:01:22,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:01:22,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:01:22,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:01:22,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:01:22,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:01:22,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:01:22,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:01:22,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:01:22,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:01:22,680 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:01:22,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:01:22,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:01:22,684 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:01:22,684 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:01:22,684 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:01:22,684 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:01:22,684 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:01:22,691 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:01:22,691 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:01:22,692 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:01:22,693 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:01:22,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:01:22,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:01:22,693 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:01:22,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:01:22,694 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:01:22,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:01:22,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:01:22,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:01:22,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:01:22,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:01:22,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:01:22,696 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:01:22,696 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:01:22,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:01:22,697 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:01:22,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:01:22,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:01:22,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:01:22,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:01:22,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:01:22,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:01:22,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:01:22,699 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:01:22,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:01:22,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:01:22,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:01:22,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:01:22,700 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_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6768ec4cb10c0d030986cdc2e459713dbcdaadd [2021-10-13 07:01:22,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:01:22,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:01:22,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:01:22,999 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:01:22,999 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:01:23,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/systemc/transmitter.03.cil.c [2021-10-13 07:01:23,078 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/data/e94d2315a/ae36abd7bd64466bb7d7718f46281db5/FLAGea53971b9 [2021-10-13 07:01:23,620 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:01:23,621 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/sv-benchmarks/c/systemc/transmitter.03.cil.c [2021-10-13 07:01:23,639 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/data/e94d2315a/ae36abd7bd64466bb7d7718f46281db5/FLAGea53971b9 [2021-10-13 07:01:23,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/data/e94d2315a/ae36abd7bd64466bb7d7718f46281db5 [2021-10-13 07:01:24,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:01:24,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:01:24,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:01:24,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:01:24,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:01:24,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:23" (1/1) ... [2021-10-13 07:01:24,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b36c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24, skipping insertion in model container [2021-10-13 07:01:24,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:01:23" (1/1) ... [2021-10-13 07:01:24,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:01:24,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:01:24,233 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_cd70b1f6-79d4-440a-9293-8acdc7c097a5/sv-benchmarks/c/systemc/transmitter.03.cil.c[401,414] [2021-10-13 07:01:24,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:01:24,305 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:01:24,322 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_cd70b1f6-79d4-440a-9293-8acdc7c097a5/sv-benchmarks/c/systemc/transmitter.03.cil.c[401,414] [2021-10-13 07:01:24,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:01:24,404 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:01:24,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24 WrapperNode [2021-10-13 07:01:24,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:01:24,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:01:24,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:01:24,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:01:24,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:01:24,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:01:24,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:01:24,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:01:24,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:01:24,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:01:24,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:01:24,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:01:24,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (1/1) ... [2021-10-13 07:01:24,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:01:24,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:24,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:01:24,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:01:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:01:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:01:24,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:01:24,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:01:26,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:01:26,328 INFO L299 CfgBuilder]: Removed 119 assume(true) statements. [2021-10-13 07:01:26,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:26 BoogieIcfgContainer [2021-10-13 07:01:26,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:01:26,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:01:26,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:01:26,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:01:26,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:01:23" (1/3) ... [2021-10-13 07:01:26,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efa564e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:26, skipping insertion in model container [2021-10-13 07:01:26,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:01:24" (2/3) ... [2021-10-13 07:01:26,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efa564e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:01:26, skipping insertion in model container [2021-10-13 07:01:26,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:26" (3/3) ... [2021-10-13 07:01:26,341 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.03.cil.c [2021-10-13 07:01:26,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:01:26,347 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:01:26,394 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:01:26,400 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:01:26,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:01:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 128 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:01:26,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:26,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:26,426 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash -353893713, now seen corresponding path program 1 times [2021-10-13 07:01:26,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:26,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121946887] [2021-10-13 07:01:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:26,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:26,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:26,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121946887] [2021-10-13 07:01:26,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121946887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:26,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:26,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:01:26,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400982027] [2021-10-13 07:01:26,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:26,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:26,708 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 128 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:26,826 INFO L93 Difference]: Finished difference Result 343 states and 529 transitions. [2021-10-13 07:01:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:26,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 07:01:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:26,845 INFO L225 Difference]: With dead ends: 343 [2021-10-13 07:01:26,845 INFO L226 Difference]: Without dead ends: 216 [2021-10-13 07:01:26,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:26,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-10-13 07:01:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2021-10-13 07:01:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4952830188679245) internal successors, (317), 212 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 317 transitions. [2021-10-13 07:01:26,927 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 317 transitions. Word has length 24 [2021-10-13 07:01:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:26,928 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 317 transitions. [2021-10-13 07:01:26,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 317 transitions. [2021-10-13 07:01:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:01:26,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:26,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:26,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:01:26,931 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash 307440078, now seen corresponding path program 1 times [2021-10-13 07:01:26,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:26,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773042623] [2021-10-13 07:01:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:26,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:27,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:27,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773042623] [2021-10-13 07:01:27,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773042623] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:27,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:27,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:01:27,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488349260] [2021-10-13 07:01:27,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:27,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:27,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:27,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:27,054 INFO L87 Difference]: Start difference. First operand 213 states and 317 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:27,127 INFO L93 Difference]: Finished difference Result 598 states and 890 transitions. [2021-10-13 07:01:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:27,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 07:01:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:27,131 INFO L225 Difference]: With dead ends: 598 [2021-10-13 07:01:27,132 INFO L226 Difference]: Without dead ends: 398 [2021-10-13 07:01:27,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-10-13 07:01:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2021-10-13 07:01:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.460759493670886) internal successors, (577), 395 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 577 transitions. [2021-10-13 07:01:27,175 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 577 transitions. Word has length 24 [2021-10-13 07:01:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:27,175 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 577 transitions. [2021-10-13 07:01:27,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 577 transitions. [2021-10-13 07:01:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:01:27,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:27,186 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:27,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:01:27,186 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:27,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:27,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1943490319, now seen corresponding path program 1 times [2021-10-13 07:01:27,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:27,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047767955] [2021-10-13 07:01:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:27,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 07:01:27,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:27,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047767955] [2021-10-13 07:01:27,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047767955] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:27,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:27,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:27,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640539533] [2021-10-13 07:01:27,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:27,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:27,279 INFO L87 Difference]: Start difference. First operand 396 states and 577 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:27,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:27,390 INFO L93 Difference]: Finished difference Result 1352 states and 1970 transitions. [2021-10-13 07:01:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:27,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 07:01:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:27,397 INFO L225 Difference]: With dead ends: 1352 [2021-10-13 07:01:27,397 INFO L226 Difference]: Without dead ends: 971 [2021-10-13 07:01:27,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-10-13 07:01:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 695. [2021-10-13 07:01:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.4610951008645534) internal successors, (1014), 694 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1014 transitions. [2021-10-13 07:01:27,473 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1014 transitions. Word has length 33 [2021-10-13 07:01:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:27,473 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1014 transitions. [2021-10-13 07:01:27,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1014 transitions. [2021-10-13 07:01:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 07:01:27,475 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:27,475 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 07:01:27,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:01:27,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash 637142437, now seen corresponding path program 1 times [2021-10-13 07:01:27,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:27,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391969232] [2021-10-13 07:01:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:27,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:01:27,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:27,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391969232] [2021-10-13 07:01:27,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391969232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:27,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:27,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:27,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897399233] [2021-10-13 07:01:27,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:27,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:27,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:27,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:27,565 INFO L87 Difference]: Start difference. First operand 695 states and 1014 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:27,689 INFO L93 Difference]: Finished difference Result 1943 states and 2847 transitions. [2021-10-13 07:01:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:27,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-13 07:01:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:27,698 INFO L225 Difference]: With dead ends: 1943 [2021-10-13 07:01:27,698 INFO L226 Difference]: Without dead ends: 1263 [2021-10-13 07:01:27,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-10-13 07:01:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 996. [2021-10-13 07:01:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.4623115577889447) internal successors, (1455), 995 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1455 transitions. [2021-10-13 07:01:27,765 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1455 transitions. Word has length 35 [2021-10-13 07:01:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:27,765 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1455 transitions. [2021-10-13 07:01:27,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1455 transitions. [2021-10-13 07:01:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 07:01:27,768 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:27,768 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 07:01:27,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:01:27,768 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1671338993, now seen corresponding path program 1 times [2021-10-13 07:01:27,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:27,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293472535] [2021-10-13 07:01:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:27,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:01:27,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:27,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293472535] [2021-10-13 07:01:27,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293472535] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:27,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:27,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:27,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928255686] [2021-10-13 07:01:27,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:27,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:27,828 INFO L87 Difference]: Start difference. First operand 996 states and 1455 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:28,032 INFO L93 Difference]: Finished difference Result 3393 states and 4937 transitions. [2021-10-13 07:01:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:28,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-13 07:01:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:28,048 INFO L225 Difference]: With dead ends: 3393 [2021-10-13 07:01:28,048 INFO L226 Difference]: Without dead ends: 2412 [2021-10-13 07:01:28,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-10-13 07:01:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1745. [2021-10-13 07:01:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 1.4541284403669725) internal successors, (2536), 1744 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2536 transitions. [2021-10-13 07:01:28,159 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2536 transitions. Word has length 37 [2021-10-13 07:01:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:28,159 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 2536 transitions. [2021-10-13 07:01:28,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2536 transitions. [2021-10-13 07:01:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 07:01:28,162 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:28,162 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 07:01:28,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:01:28,162 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash 296640951, now seen corresponding path program 1 times [2021-10-13 07:01:28,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:28,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683529847] [2021-10-13 07:01:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:28,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:28,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:28,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683529847] [2021-10-13 07:01:28,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683529847] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:28,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:28,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:28,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698265723] [2021-10-13 07:01:28,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:28,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:28,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:28,239 INFO L87 Difference]: Start difference. First operand 1745 states and 2536 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:28,367 INFO L93 Difference]: Finished difference Result 3243 states and 4777 transitions. [2021-10-13 07:01:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-13 07:01:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:28,381 INFO L225 Difference]: With dead ends: 3243 [2021-10-13 07:01:28,382 INFO L226 Difference]: Without dead ends: 2351 [2021-10-13 07:01:28,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-10-13 07:01:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1893. [2021-10-13 07:01:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 1.4630021141649048) internal successors, (2768), 1892 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2768 transitions. [2021-10-13 07:01:28,507 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2768 transitions. Word has length 39 [2021-10-13 07:01:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:28,507 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2768 transitions. [2021-10-13 07:01:28,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2768 transitions. [2021-10-13 07:01:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 07:01:28,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:28,512 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 07:01:28,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:01:28,513 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:28,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1362809959, now seen corresponding path program 1 times [2021-10-13 07:01:28,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:28,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206736945] [2021-10-13 07:01:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:28,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:01:28,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:28,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206736945] [2021-10-13 07:01:28,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206736945] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:28,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:28,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:01:28,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081284949] [2021-10-13 07:01:28,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:28,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:28,573 INFO L87 Difference]: Start difference. First operand 1893 states and 2768 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:28,721 INFO L93 Difference]: Finished difference Result 4609 states and 6718 transitions. [2021-10-13 07:01:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-13 07:01:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:28,738 INFO L225 Difference]: With dead ends: 4609 [2021-10-13 07:01:28,738 INFO L226 Difference]: Without dead ends: 2725 [2021-10-13 07:01:28,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-10-13 07:01:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2705. [2021-10-13 07:01:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2705 states, 2704 states have (on average 1.4386094674556213) internal successors, (3890), 2704 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 3890 transitions. [2021-10-13 07:01:28,905 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 3890 transitions. Word has length 54 [2021-10-13 07:01:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:28,906 INFO L470 AbstractCegarLoop]: Abstraction has 2705 states and 3890 transitions. [2021-10-13 07:01:28,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 3890 transitions. [2021-10-13 07:01:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 07:01:28,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:28,912 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 07:01:28,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:01:28,912 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash -855675489, now seen corresponding path program 1 times [2021-10-13 07:01:28,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:28,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879353572] [2021-10-13 07:01:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:28,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:01:28,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:28,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879353572] [2021-10-13 07:01:28,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879353572] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:28,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:28,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:28,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185144405] [2021-10-13 07:01:28,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:28,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:28,961 INFO L87 Difference]: Start difference. First operand 2705 states and 3890 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:29,270 INFO L93 Difference]: Finished difference Result 7690 states and 11025 transitions. [2021-10-13 07:01:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:29,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-13 07:01:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:29,298 INFO L225 Difference]: With dead ends: 7690 [2021-10-13 07:01:29,298 INFO L226 Difference]: Without dead ends: 4987 [2021-10-13 07:01:29,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-10-13 07:01:29,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4949. [2021-10-13 07:01:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 1.404607922392886) internal successors, (6950), 4948 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 6950 transitions. [2021-10-13 07:01:29,605 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 6950 transitions. Word has length 54 [2021-10-13 07:01:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:29,605 INFO L470 AbstractCegarLoop]: Abstraction has 4949 states and 6950 transitions. [2021-10-13 07:01:29,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 6950 transitions. [2021-10-13 07:01:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 07:01:29,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:29,611 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 07:01:29,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 07:01:29,612 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:29,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:29,612 INFO L82 PathProgramCache]: Analyzing trace with hash -969062146, now seen corresponding path program 1 times [2021-10-13 07:01:29,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:29,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017962848] [2021-10-13 07:01:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:29,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:01:29,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:29,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017962848] [2021-10-13 07:01:29,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017962848] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:29,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:29,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:29,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594961156] [2021-10-13 07:01:29,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:29,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:29,670 INFO L87 Difference]: Start difference. First operand 4949 states and 6950 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:30,053 INFO L93 Difference]: Finished difference Result 10721 states and 15232 transitions. [2021-10-13 07:01:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:30,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-13 07:01:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:30,090 INFO L225 Difference]: With dead ends: 10721 [2021-10-13 07:01:30,091 INFO L226 Difference]: Without dead ends: 6437 [2021-10-13 07:01:30,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:30,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6437 states. [2021-10-13 07:01:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6437 to 6285. [2021-10-13 07:01:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6285 states, 6284 states have (on average 1.4174092934436664) internal successors, (8907), 6284 states have internal predecessors, (8907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6285 states to 6285 states and 8907 transitions. [2021-10-13 07:01:30,520 INFO L78 Accepts]: Start accepts. Automaton has 6285 states and 8907 transitions. Word has length 54 [2021-10-13 07:01:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:30,521 INFO L470 AbstractCegarLoop]: Abstraction has 6285 states and 8907 transitions. [2021-10-13 07:01:30,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6285 states and 8907 transitions. [2021-10-13 07:01:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 07:01:30,527 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:30,527 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 07:01:30,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 07:01:30,528 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:30,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:30,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2046580415, now seen corresponding path program 1 times [2021-10-13 07:01:30,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:30,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558073797] [2021-10-13 07:01:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:30,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:30,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:30,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558073797] [2021-10-13 07:01:30,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558073797] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:30,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:30,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:30,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828227205] [2021-10-13 07:01:30,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:30,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:30,570 INFO L87 Difference]: Start difference. First operand 6285 states and 8907 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:30,947 INFO L93 Difference]: Finished difference Result 9687 states and 13825 transitions. [2021-10-13 07:01:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:30,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-13 07:01:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:30,995 INFO L225 Difference]: With dead ends: 9687 [2021-10-13 07:01:30,996 INFO L226 Difference]: Without dead ends: 6285 [2021-10-13 07:01:31,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2021-10-13 07:01:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6179. [2021-10-13 07:01:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6179 states, 6178 states have (on average 1.3886370993849142) internal successors, (8579), 6178 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 8579 transitions. [2021-10-13 07:01:31,374 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 8579 transitions. Word has length 54 [2021-10-13 07:01:31,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:31,375 INFO L470 AbstractCegarLoop]: Abstraction has 6179 states and 8579 transitions. [2021-10-13 07:01:31,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 8579 transitions. [2021-10-13 07:01:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-13 07:01:31,381 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:31,381 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 07:01:31,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 07:01:31,382 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1406015679, now seen corresponding path program 1 times [2021-10-13 07:01:31,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:31,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791885435] [2021-10-13 07:01:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:31,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:31,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:31,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791885435] [2021-10-13 07:01:31,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791885435] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:31,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:31,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:01:31,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066135612] [2021-10-13 07:01:31,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:31,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:31,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:31,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:31,433 INFO L87 Difference]: Start difference. First operand 6179 states and 8579 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:31,895 INFO L93 Difference]: Finished difference Result 11913 states and 16277 transitions. [2021-10-13 07:01:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:31,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-10-13 07:01:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:31,919 INFO L225 Difference]: With dead ends: 11913 [2021-10-13 07:01:31,919 INFO L226 Difference]: Without dead ends: 9310 [2021-10-13 07:01:31,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2021-10-13 07:01:32,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 7707. [2021-10-13 07:01:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 1.3542694004671685) internal successors, (10436), 7706 states have internal predecessors, (10436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 10436 transitions. [2021-10-13 07:01:32,410 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 10436 transitions. Word has length 55 [2021-10-13 07:01:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:32,411 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 10436 transitions. [2021-10-13 07:01:32,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 10436 transitions. [2021-10-13 07:01:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 07:01:32,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:32,419 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:32,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 07:01:32,420 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash 560491726, now seen corresponding path program 1 times [2021-10-13 07:01:32,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:32,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437206110] [2021-10-13 07:01:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:32,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:32,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:32,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437206110] [2021-10-13 07:01:32,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437206110] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:32,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:32,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:32,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566907079] [2021-10-13 07:01:32,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:32,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:32,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:32,461 INFO L87 Difference]: Start difference. First operand 7707 states and 10436 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:32,923 INFO L93 Difference]: Finished difference Result 14309 states and 19640 transitions. [2021-10-13 07:01:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:32,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-10-13 07:01:32,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:32,946 INFO L225 Difference]: With dead ends: 14309 [2021-10-13 07:01:32,947 INFO L226 Difference]: Without dead ends: 8935 [2021-10-13 07:01:32,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2021-10-13 07:01:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 8162. [2021-10-13 07:01:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8161 states have (on average 1.3635583874525181) internal successors, (11128), 8161 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 11128 transitions. [2021-10-13 07:01:33,408 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 11128 transitions. Word has length 56 [2021-10-13 07:01:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:33,408 INFO L470 AbstractCegarLoop]: Abstraction has 8162 states and 11128 transitions. [2021-10-13 07:01:33,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 11128 transitions. [2021-10-13 07:01:33,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-13 07:01:33,416 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:33,416 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:33,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 07:01:33,417 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:33,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1770572136, now seen corresponding path program 1 times [2021-10-13 07:01:33,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:33,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425604339] [2021-10-13 07:01:33,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:33,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:01:33,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:33,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425604339] [2021-10-13 07:01:33,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425604339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:33,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419624256] [2021-10-13 07:01:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:33,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:33,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:33,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:33,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:01:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:33,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:01:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:33,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:34,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419624256] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:34,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:34,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [4] total 7 [2021-10-13 07:01:34,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387165041] [2021-10-13 07:01:34,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:01:34,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:34,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:01:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:01:34,057 INFO L87 Difference]: Start difference. First operand 8162 states and 11128 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:34,790 INFO L93 Difference]: Finished difference Result 19949 states and 27238 transitions. [2021-10-13 07:01:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:01:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-13 07:01:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:34,820 INFO L225 Difference]: With dead ends: 19949 [2021-10-13 07:01:34,821 INFO L226 Difference]: Without dead ends: 11967 [2021-10-13 07:01:34,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:01:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11967 states. [2021-10-13 07:01:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11967 to 6801. [2021-10-13 07:01:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6801 states, 6800 states have (on average 1.3745588235294117) internal successors, (9347), 6800 states have internal predecessors, (9347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6801 states to 6801 states and 9347 transitions. [2021-10-13 07:01:35,356 INFO L78 Accepts]: Start accepts. Automaton has 6801 states and 9347 transitions. Word has length 58 [2021-10-13 07:01:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:35,356 INFO L470 AbstractCegarLoop]: Abstraction has 6801 states and 9347 transitions. [2021-10-13 07:01:35,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 6801 states and 9347 transitions. [2021-10-13 07:01:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-13 07:01:35,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:35,368 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:35,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:35,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-13 07:01:35,589 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:35,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2020330492, now seen corresponding path program 1 times [2021-10-13 07:01:35,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:35,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688118193] [2021-10-13 07:01:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:35,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:35,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:35,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688118193] [2021-10-13 07:01:35,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688118193] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:35,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:35,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:35,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29841802] [2021-10-13 07:01:35,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:35,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:35,640 INFO L87 Difference]: Start difference. First operand 6801 states and 9347 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:35,999 INFO L93 Difference]: Finished difference Result 11744 states and 16246 transitions. [2021-10-13 07:01:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-10-13 07:01:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:36,018 INFO L225 Difference]: With dead ends: 11744 [2021-10-13 07:01:36,018 INFO L226 Difference]: Without dead ends: 6845 [2021-10-13 07:01:36,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2021-10-13 07:01:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6777. [2021-10-13 07:01:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 6776 states have (on average 1.3342680047225501) internal successors, (9041), 6776 states have internal predecessors, (9041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 9041 transitions. [2021-10-13 07:01:36,491 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 9041 transitions. Word has length 72 [2021-10-13 07:01:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:36,491 INFO L470 AbstractCegarLoop]: Abstraction has 6777 states and 9041 transitions. [2021-10-13 07:01:36,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 9041 transitions. [2021-10-13 07:01:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-13 07:01:36,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:36,505 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:36,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 07:01:36,506 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:36,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:36,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1351056718, now seen corresponding path program 1 times [2021-10-13 07:01:36,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:36,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948488001] [2021-10-13 07:01:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:36,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:36,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:36,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948488001] [2021-10-13 07:01:36,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948488001] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:36,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:36,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:01:36,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054964150] [2021-10-13 07:01:36,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:36,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:36,566 INFO L87 Difference]: Start difference. First operand 6777 states and 9041 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:37,200 INFO L93 Difference]: Finished difference Result 16626 states and 22017 transitions. [2021-10-13 07:01:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:01:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-10-13 07:01:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:37,236 INFO L225 Difference]: With dead ends: 16626 [2021-10-13 07:01:37,237 INFO L226 Difference]: Without dead ends: 11423 [2021-10-13 07:01:37,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:01:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11423 states. [2021-10-13 07:01:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11423 to 9118. [2021-10-13 07:01:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9118 states, 9117 states have (on average 1.3133706263025118) internal successors, (11974), 9117 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9118 states to 9118 states and 11974 transitions. [2021-10-13 07:01:37,810 INFO L78 Accepts]: Start accepts. Automaton has 9118 states and 11974 transitions. Word has length 72 [2021-10-13 07:01:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:37,811 INFO L470 AbstractCegarLoop]: Abstraction has 9118 states and 11974 transitions. [2021-10-13 07:01:37,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 9118 states and 11974 transitions. [2021-10-13 07:01:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-13 07:01:37,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:37,837 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:37,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-13 07:01:37,838 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1659495727, now seen corresponding path program 1 times [2021-10-13 07:01:37,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:37,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726647613] [2021-10-13 07:01:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:37,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:37,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:37,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726647613] [2021-10-13 07:01:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726647613] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:37,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:37,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:37,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941278255] [2021-10-13 07:01:37,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:37,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:37,888 INFO L87 Difference]: Start difference. First operand 9118 states and 11974 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:38,196 INFO L93 Difference]: Finished difference Result 14023 states and 18587 transitions. [2021-10-13 07:01:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:38,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-10-13 07:01:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:38,211 INFO L225 Difference]: With dead ends: 14023 [2021-10-13 07:01:38,211 INFO L226 Difference]: Without dead ends: 5572 [2021-10-13 07:01:38,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5572 states. [2021-10-13 07:01:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5572 to 4816. [2021-10-13 07:01:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4816 states, 4815 states have (on average 1.2868120456905503) internal successors, (6196), 4815 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6196 transitions. [2021-10-13 07:01:38,534 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6196 transitions. Word has length 72 [2021-10-13 07:01:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:38,534 INFO L470 AbstractCegarLoop]: Abstraction has 4816 states and 6196 transitions. [2021-10-13 07:01:38,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6196 transitions. [2021-10-13 07:01:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-13 07:01:38,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:38,545 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:38,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 07:01:38,546 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:38,546 INFO L82 PathProgramCache]: Analyzing trace with hash 748008405, now seen corresponding path program 1 times [2021-10-13 07:01:38,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:38,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536198702] [2021-10-13 07:01:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:38,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 07:01:38,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:38,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536198702] [2021-10-13 07:01:38,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536198702] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:38,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:38,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:38,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988112525] [2021-10-13 07:01:38,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:38,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:38,610 INFO L87 Difference]: Start difference. First operand 4816 states and 6196 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:38,894 INFO L93 Difference]: Finished difference Result 8480 states and 10896 transitions. [2021-10-13 07:01:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:38,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-10-13 07:01:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:38,906 INFO L225 Difference]: With dead ends: 8480 [2021-10-13 07:01:38,906 INFO L226 Difference]: Without dead ends: 5096 [2021-10-13 07:01:38,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2021-10-13 07:01:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 4672. [2021-10-13 07:01:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 1.2680368229501178) internal successors, (5923), 4671 states have internal predecessors, (5923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 5923 transitions. [2021-10-13 07:01:39,201 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 5923 transitions. Word has length 73 [2021-10-13 07:01:39,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:39,202 INFO L470 AbstractCegarLoop]: Abstraction has 4672 states and 5923 transitions. [2021-10-13 07:01:39,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 5923 transitions. [2021-10-13 07:01:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-13 07:01:39,209 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:39,210 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:39,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 07:01:39,210 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash 343149287, now seen corresponding path program 1 times [2021-10-13 07:01:39,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:39,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52872463] [2021-10-13 07:01:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:39,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:01:39,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:39,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52872463] [2021-10-13 07:01:39,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52872463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:39,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210197480] [2021-10-13 07:01:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:39,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:39,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:39,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:01:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:01:39,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:39,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:39,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210197480] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:39,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:39,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [4] total 10 [2021-10-13 07:01:39,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368356031] [2021-10-13 07:01:39,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:01:39,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:39,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:01:39,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:01:39,929 INFO L87 Difference]: Start difference. First operand 4672 states and 5923 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:40,634 INFO L93 Difference]: Finished difference Result 10023 states and 13004 transitions. [2021-10-13 07:01:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 07:01:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-10-13 07:01:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:40,647 INFO L225 Difference]: With dead ends: 10023 [2021-10-13 07:01:40,647 INFO L226 Difference]: Without dead ends: 6212 [2021-10-13 07:01:40,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-10-13 07:01:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2021-10-13 07:01:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 3359. [2021-10-13 07:01:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 1.2989874925550924) internal successors, (4362), 3358 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4362 transitions. [2021-10-13 07:01:40,887 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 4362 transitions. Word has length 73 [2021-10-13 07:01:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:40,887 INFO L470 AbstractCegarLoop]: Abstraction has 3359 states and 4362 transitions. [2021-10-13 07:01:40,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 4362 transitions. [2021-10-13 07:01:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-13 07:01:40,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:40,893 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:40,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:41,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:41,111 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1426202342, now seen corresponding path program 1 times [2021-10-13 07:01:41,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:41,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078650968] [2021-10-13 07:01:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:41,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:41,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:41,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078650968] [2021-10-13 07:01:41,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078650968] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:41,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:41,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 07:01:41,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340751741] [2021-10-13 07:01:41,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:41,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:41,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:41,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:41,181 INFO L87 Difference]: Start difference. First operand 3359 states and 4362 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:41,438 INFO L93 Difference]: Finished difference Result 6620 states and 8637 transitions. [2021-10-13 07:01:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-13 07:01:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:41,446 INFO L225 Difference]: With dead ends: 6620 [2021-10-13 07:01:41,446 INFO L226 Difference]: Without dead ends: 4179 [2021-10-13 07:01:41,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:01:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-10-13 07:01:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 3663. [2021-10-13 07:01:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 1.288367012561442) internal successors, (4718), 3662 states have internal predecessors, (4718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 4718 transitions. [2021-10-13 07:01:41,718 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 4718 transitions. Word has length 74 [2021-10-13 07:01:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:41,719 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 4718 transitions. [2021-10-13 07:01:41,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 4718 transitions. [2021-10-13 07:01:41,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-13 07:01:41,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:41,724 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:41,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-13 07:01:41,725 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:41,725 INFO L82 PathProgramCache]: Analyzing trace with hash -120801950, now seen corresponding path program 1 times [2021-10-13 07:01:41,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:41,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756091581] [2021-10-13 07:01:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:41,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:41,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:41,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756091581] [2021-10-13 07:01:41,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756091581] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:41,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:41,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:01:41,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803511102] [2021-10-13 07:01:41,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:01:41,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:41,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:01:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:01:41,782 INFO L87 Difference]: Start difference. First operand 3663 states and 4718 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:42,440 INFO L93 Difference]: Finished difference Result 11633 states and 14836 transitions. [2021-10-13 07:01:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:01:42,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-13 07:01:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:42,454 INFO L225 Difference]: With dead ends: 11633 [2021-10-13 07:01:42,454 INFO L226 Difference]: Without dead ends: 8293 [2021-10-13 07:01:42,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:01:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8293 states. [2021-10-13 07:01:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8293 to 4645. [2021-10-13 07:01:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4645 states, 4644 states have (on average 1.2790697674418605) internal successors, (5940), 4644 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4645 states to 4645 states and 5940 transitions. [2021-10-13 07:01:42,796 INFO L78 Accepts]: Start accepts. Automaton has 4645 states and 5940 transitions. Word has length 74 [2021-10-13 07:01:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:42,797 INFO L470 AbstractCegarLoop]: Abstraction has 4645 states and 5940 transitions. [2021-10-13 07:01:42,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4645 states and 5940 transitions. [2021-10-13 07:01:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-13 07:01:42,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:42,804 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:42,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-13 07:01:42,805 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2116561315, now seen corresponding path program 1 times [2021-10-13 07:01:42,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:42,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285691691] [2021-10-13 07:01:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:42,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:42,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:42,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285691691] [2021-10-13 07:01:42,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285691691] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:42,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:42,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:42,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018517379] [2021-10-13 07:01:42,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:42,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:42,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:42,843 INFO L87 Difference]: Start difference. First operand 4645 states and 5940 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:43,234 INFO L93 Difference]: Finished difference Result 9104 states and 11658 transitions. [2021-10-13 07:01:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-13 07:01:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:43,244 INFO L225 Difference]: With dead ends: 9104 [2021-10-13 07:01:43,244 INFO L226 Difference]: Without dead ends: 4641 [2021-10-13 07:01:43,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:43,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-10-13 07:01:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 4613. [2021-10-13 07:01:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 1.2202948829141371) internal successors, (5628), 4612 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 5628 transitions. [2021-10-13 07:01:43,633 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 5628 transitions. Word has length 74 [2021-10-13 07:01:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:43,634 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 5628 transitions. [2021-10-13 07:01:43,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:43,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 5628 transitions. [2021-10-13 07:01:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 07:01:43,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:43,642 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:43,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-13 07:01:43,643 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:43,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529861, now seen corresponding path program 1 times [2021-10-13 07:01:43,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:43,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588280040] [2021-10-13 07:01:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:43,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:43,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:43,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588280040] [2021-10-13 07:01:43,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588280040] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:43,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:43,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:43,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012192695] [2021-10-13 07:01:43,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:43,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:43,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:43,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:43,684 INFO L87 Difference]: Start difference. First operand 4613 states and 5628 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:44,100 INFO L93 Difference]: Finished difference Result 9028 states and 11144 transitions. [2021-10-13 07:01:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:44,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-13 07:01:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:44,108 INFO L225 Difference]: With dead ends: 9028 [2021-10-13 07:01:44,108 INFO L226 Difference]: Without dead ends: 4601 [2021-10-13 07:01:44,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:44,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-10-13 07:01:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4273. [2021-10-13 07:01:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 1.2425093632958801) internal successors, (5308), 4272 states have internal predecessors, (5308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 5308 transitions. [2021-10-13 07:01:44,501 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 5308 transitions. Word has length 75 [2021-10-13 07:01:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:44,501 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 5308 transitions. [2021-10-13 07:01:44,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 5308 transitions. [2021-10-13 07:01:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 07:01:44,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:44,509 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:44,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-13 07:01:44,510 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2109087771, now seen corresponding path program 1 times [2021-10-13 07:01:44,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:44,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552135485] [2021-10-13 07:01:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:44,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:44,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:44,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552135485] [2021-10-13 07:01:44,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552135485] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:44,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:01:44,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:01:44,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362715384] [2021-10-13 07:01:44,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:01:44,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:01:44,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:44,577 INFO L87 Difference]: Start difference. First operand 4273 states and 5308 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:44,926 INFO L93 Difference]: Finished difference Result 7236 states and 9062 transitions. [2021-10-13 07:01:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:01:44,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-13 07:01:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:44,932 INFO L225 Difference]: With dead ends: 7236 [2021-10-13 07:01:44,932 INFO L226 Difference]: Without dead ends: 3291 [2021-10-13 07:01:44,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:01:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-10-13 07:01:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3291. [2021-10-13 07:01:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3290 states have (on average 1.2264437689969605) internal successors, (4035), 3290 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 4035 transitions. [2021-10-13 07:01:45,273 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 4035 transitions. Word has length 75 [2021-10-13 07:01:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:45,273 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 4035 transitions. [2021-10-13 07:01:45,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 4035 transitions. [2021-10-13 07:01:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 07:01:45,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:45,280 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:45,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-13 07:01:45,281 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash 228133449, now seen corresponding path program 1 times [2021-10-13 07:01:45,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:45,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339071734] [2021-10-13 07:01:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:45,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:45,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:45,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339071734] [2021-10-13 07:01:45,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339071734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:45,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353033941] [2021-10-13 07:01:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:45,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:45,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:45,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:01:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:45,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:01:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:45,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:46,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353033941] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:46,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:46,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 4] imperfect sequences [4] total 12 [2021-10-13 07:01:46,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894135821] [2021-10-13 07:01:46,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:01:46,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:46,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:01:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:01:46,188 INFO L87 Difference]: Start difference. First operand 3291 states and 4035 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:47,103 INFO L93 Difference]: Finished difference Result 7372 states and 9115 transitions. [2021-10-13 07:01:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 07:01:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-13 07:01:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:47,109 INFO L225 Difference]: With dead ends: 7372 [2021-10-13 07:01:47,110 INFO L226 Difference]: Without dead ends: 4409 [2021-10-13 07:01:47,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-10-13 07:01:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-10-13 07:01:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 2542. [2021-10-13 07:01:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2541 states have (on average 1.2239275875639513) internal successors, (3110), 2541 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 3110 transitions. [2021-10-13 07:01:47,297 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 3110 transitions. Word has length 75 [2021-10-13 07:01:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:47,297 INFO L470 AbstractCegarLoop]: Abstraction has 2542 states and 3110 transitions. [2021-10-13 07:01:47,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 3110 transitions. [2021-10-13 07:01:47,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-13 07:01:47,301 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:47,301 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:47,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:47,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:47,504 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash 260632163, now seen corresponding path program 1 times [2021-10-13 07:01:47,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:47,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967755494] [2021-10-13 07:01:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:47,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:47,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:47,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967755494] [2021-10-13 07:01:47,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967755494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:47,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205054361] [2021-10-13 07:01:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:47,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:47,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:47,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:47,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:01:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:47,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:01:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:47,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:48,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205054361] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:48,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:48,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2021-10-13 07:01:48,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343518421] [2021-10-13 07:01:48,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:01:48,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:01:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:01:48,155 INFO L87 Difference]: Start difference. First operand 2542 states and 3110 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:48,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:48,473 INFO L93 Difference]: Finished difference Result 5303 states and 6488 transitions. [2021-10-13 07:01:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:01:48,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-13 07:01:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:48,476 INFO L225 Difference]: With dead ends: 5303 [2021-10-13 07:01:48,477 INFO L226 Difference]: Without dead ends: 3281 [2021-10-13 07:01:48,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:01:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2021-10-13 07:01:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 2126. [2021-10-13 07:01:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 1.2004705882352942) internal successors, (2551), 2125 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 2551 transitions. [2021-10-13 07:01:48,681 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 2551 transitions. Word has length 76 [2021-10-13 07:01:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:48,681 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 2551 transitions. [2021-10-13 07:01:48,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 2551 transitions. [2021-10-13 07:01:48,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 07:01:48,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:48,685 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:48,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:48,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 07:01:48,888 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash 762478353, now seen corresponding path program 1 times [2021-10-13 07:01:48,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:48,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373488223] [2021-10-13 07:01:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:48,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:48,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:48,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373488223] [2021-10-13 07:01:48,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373488223] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:48,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648277560] [2021-10-13 07:01:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:48,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:48,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:48,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:48,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:01:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:01:49,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:49,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:50,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648277560] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:50,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:01:50,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 6] total 11 [2021-10-13 07:01:50,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060125692] [2021-10-13 07:01:50,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:01:50,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:01:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:01:50,041 INFO L87 Difference]: Start difference. First operand 2126 states and 2551 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:50,448 INFO L93 Difference]: Finished difference Result 4897 states and 5939 transitions. [2021-10-13 07:01:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:01:50,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-13 07:01:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:50,454 INFO L225 Difference]: With dead ends: 4897 [2021-10-13 07:01:50,454 INFO L226 Difference]: Without dead ends: 3206 [2021-10-13 07:01:50,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:01:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-10-13 07:01:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3202. [2021-10-13 07:01:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 1.2068103717588254) internal successors, (3863), 3201 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 3863 transitions. [2021-10-13 07:01:50,717 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 3863 transitions. Word has length 77 [2021-10-13 07:01:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:50,718 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 3863 transitions. [2021-10-13 07:01:50,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 3863 transitions. [2021-10-13 07:01:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 07:01:50,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:50,720 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:50,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:50,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 07:01:50,924 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:50,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:50,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1858291132, now seen corresponding path program 1 times [2021-10-13 07:01:50,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:50,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127994819] [2021-10-13 07:01:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:50,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:50,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:50,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127994819] [2021-10-13 07:01:50,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127994819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:50,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918107118] [2021-10-13 07:01:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:50,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:50,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:50,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:51,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 07:01:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:51,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:01:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:51,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:52,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918107118] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:52,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:52,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [4] total 8 [2021-10-13 07:01:52,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349441490] [2021-10-13 07:01:52,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:01:52,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:01:52,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:01:52,441 INFO L87 Difference]: Start difference. First operand 3202 states and 3863 transitions. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:52,739 INFO L93 Difference]: Finished difference Result 5159 states and 6246 transitions. [2021-10-13 07:01:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:01:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-13 07:01:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:52,742 INFO L225 Difference]: With dead ends: 5159 [2021-10-13 07:01:52,742 INFO L226 Difference]: Without dead ends: 2444 [2021-10-13 07:01:52,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:01:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-10-13 07:01:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2122. [2021-10-13 07:01:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 1.1966053748231966) internal successors, (2538), 2121 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2538 transitions. [2021-10-13 07:01:52,976 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2538 transitions. Word has length 77 [2021-10-13 07:01:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:52,977 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 2538 transitions. [2021-10-13 07:01:52,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2538 transitions. [2021-10-13 07:01:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 07:01:52,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:52,979 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:53,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:53,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 07:01:53,179 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash -671934434, now seen corresponding path program 1 times [2021-10-13 07:01:53,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:53,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062463434] [2021-10-13 07:01:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:53,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:01:53,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:01:53,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062463434] [2021-10-13 07:01:53,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062463434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:01:53,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595135602] [2021-10-13 07:01:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:53,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:53,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:53,256 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:53,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:01:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:01:53,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:01:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:54,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:01:54,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595135602] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:01:54,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:01:54,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [4] total 8 [2021-10-13 07:01:54,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865431942] [2021-10-13 07:01:54,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:01:54,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:01:54,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:01:54,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:01:54,841 INFO L87 Difference]: Start difference. First operand 2122 states and 2538 transitions. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:01:55,158 INFO L93 Difference]: Finished difference Result 3320 states and 4018 transitions. [2021-10-13 07:01:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:01:55,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-13 07:01:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:01:55,160 INFO L225 Difference]: With dead ends: 3320 [2021-10-13 07:01:55,160 INFO L226 Difference]: Without dead ends: 2783 [2021-10-13 07:01:55,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:01:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-10-13 07:01:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2122. [2021-10-13 07:01:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 1.1937765205091937) internal successors, (2532), 2121 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2532 transitions. [2021-10-13 07:01:55,333 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2532 transitions. Word has length 77 [2021-10-13 07:01:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:01:55,334 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 2532 transitions. [2021-10-13 07:01:55,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:01:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2532 transitions. [2021-10-13 07:01:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-13 07:01:55,335 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:01:55,336 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:01:55,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:01:55,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 07:01:55,552 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:01:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:01:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash 247564691, now seen corresponding path program 1 times [2021-10-13 07:01:55,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:01:55,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468839574] [2021-10-13 07:01:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:01:55,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:01:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:01:55,593 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:01:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:01:55,694 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:01:55,694 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:01:55,695 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:01:55,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-13 07:01:55,705 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:01:55,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:01:55 BoogieIcfgContainer [2021-10-13 07:01:55,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:01:55,894 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:01:55,894 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:01:55,894 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:01:55,894 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:01:26" (3/4) ... [2021-10-13 07:01:55,896 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:01:56,068 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:01:56,068 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:01:56,070 INFO L168 Benchmark]: Toolchain (without parser) took 32067.77 ms. Allocated memory was 132.1 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 98.7 MB in the beginning and 1.9 GB in the end (delta: -1.8 GB). Peak memory consumption was 334.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:56,070 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:01:56,071 INFO L168 Benchmark]: CACSL2BoogieTranslator took 402.94 ms. Allocated memory is still 132.1 MB. Free memory was 98.5 MB in the beginning and 104.6 MB in the end (delta: -6.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:56,071 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.13 ms. Allocated memory is still 132.1 MB. Free memory was 104.6 MB in the beginning and 101.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:56,072 INFO L168 Benchmark]: Boogie Preprocessor took 82.66 ms. Allocated memory is still 132.1 MB. Free memory was 101.0 MB in the beginning and 98.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:56,072 INFO L168 Benchmark]: RCFGBuilder took 1783.81 ms. Allocated memory is still 132.1 MB. Free memory was 98.0 MB in the beginning and 62.4 MB in the end (delta: 35.6 MB). Peak memory consumption was 62.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:56,073 INFO L168 Benchmark]: TraceAbstraction took 29559.10 ms. Allocated memory was 132.1 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 62.2 MB in the beginning and 1.9 GB in the end (delta: -1.9 GB). Peak memory consumption was 279.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:56,073 INFO L168 Benchmark]: Witness Printer took 174.62 ms. Allocated memory is still 2.3 GB. Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:01:56,075 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 90.2 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 402.94 ms. Allocated memory is still 132.1 MB. Free memory was 98.5 MB in the beginning and 104.6 MB in the end (delta: -6.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.13 ms. Allocated memory is still 132.1 MB. Free memory was 104.6 MB in the beginning and 101.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 82.66 ms. Allocated memory is still 132.1 MB. Free memory was 101.0 MB in the beginning and 98.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1783.81 ms. Allocated memory is still 132.1 MB. Free memory was 98.0 MB in the beginning and 62.4 MB in the end (delta: 35.6 MB). Peak memory consumption was 62.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 29559.10 ms. Allocated memory was 132.1 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 62.2 MB in the beginning and 1.9 GB in the end (delta: -1.9 GB). Peak memory consumption was 279.4 MB. Max. memory is 16.1 GB. * Witness Printer took 174.62 ms. Allocated memory is still 2.3 GB. Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int m_pc = 0; [L18] int t1_pc = 0; [L19] int t2_pc = 0; [L20] int t3_pc = 0; [L21] int m_st ; [L22] int t1_st ; [L23] int t2_st ; [L24] int t3_st ; [L25] int m_i ; [L26] int t1_i ; [L27] int t2_i ; [L28] int t3_i ; [L29] int M_E = 2; [L30] int T1_E = 2; [L31] int T2_E = 2; [L32] int T3_E = 2; [L33] int E_1 = 2; [L34] int E_2 = 2; [L35] int E_3 = 2; [L689] int __retres1 ; [L602] m_i = 1 [L603] t1_i = 1 [L604] t2_i = 1 [L605] t3_i = 1 [L630] int kernel_st ; [L631] int tmp ; [L632] int tmp___0 ; [L636] kernel_st = 0 [L273] COND TRUE m_i == 1 [L274] m_st = 0 [L278] COND TRUE t1_i == 1 [L279] t1_st = 0 [L283] COND TRUE t2_i == 1 [L284] t2_st = 0 [L288] COND TRUE t3_i == 1 [L289] t3_st = 0 [L410] COND FALSE !(M_E == 0) [L415] COND FALSE !(T1_E == 0) [L420] COND FALSE !(T2_E == 0) [L425] COND FALSE !(T3_E == 0) [L430] COND FALSE !(E_1 == 0) [L435] COND FALSE !(E_2 == 0) [L440] COND FALSE !(E_3 == 0) [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L189] COND FALSE !(m_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L208] COND FALSE !(t1_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND FALSE !(\read(tmp___0)) [L224] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L227] COND FALSE !(t2_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L237] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND FALSE !(\read(tmp___1)) [L243] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L246] COND FALSE !(t3_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L256] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND FALSE !(\read(tmp___2)) [L453] COND FALSE !(M_E == 1) [L458] COND FALSE !(T1_E == 1) [L463] COND FALSE !(T2_E == 1) [L468] COND FALSE !(T3_E == 1) [L473] COND FALSE !(E_1 == 1) [L478] COND FALSE !(E_2 == 1) [L483] COND FALSE !(E_3 == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L644] COND TRUE 1 [L647] kernel_st = 1 [L329] int tmp ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L333] COND TRUE 1 [L298] int __retres1 ; [L301] COND TRUE m_st == 0 [L302] __retres1 = 1 [L324] return (__retres1); [L336] tmp = exists_runnable_thread() [L338] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L343] COND TRUE m_st == 0 [L344] int tmp_ndt_1; [L345] tmp_ndt_1 = __VERIFIER_nondet_int() [L346] COND FALSE !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L357] COND TRUE t1_st == 0 [L358] int tmp_ndt_2; [L359] tmp_ndt_2 = __VERIFIER_nondet_int() [L360] COND TRUE \read(tmp_ndt_2) [L362] t1_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L86] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L97] COND TRUE 1 [L99] t1_pc = 1 [L100] t1_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L371] COND TRUE t2_st == 0 [L372] int tmp_ndt_3; [L373] tmp_ndt_3 = __VERIFIER_nondet_int() [L374] COND TRUE \read(tmp_ndt_3) [L376] t2_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L121] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L132] COND TRUE 1 [L134] t2_pc = 1 [L135] t2_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L385] COND TRUE t3_st == 0 [L386] int tmp_ndt_4; [L387] tmp_ndt_4 = __VERIFIER_nondet_int() [L388] COND TRUE \read(tmp_ndt_4) [L390] t3_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=1] [L156] COND TRUE t3_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=1] [L167] COND TRUE 1 [L169] t3_pc = 1 [L170] t3_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L333] COND TRUE 1 [L298] int __retres1 ; [L301] COND TRUE m_st == 0 [L302] __retres1 = 1 [L324] return (__retres1); [L336] tmp = exists_runnable_thread() [L338] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L343] COND TRUE m_st == 0 [L344] int tmp_ndt_1; [L345] tmp_ndt_1 = __VERIFIER_nondet_int() [L346] COND TRUE \read(tmp_ndt_1) [L348] m_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L45] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L56] COND TRUE 1 [L59] E_1 = 1 [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L189] COND FALSE !(m_pc == 1) VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L199] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L208] COND TRUE t1_pc == 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L209] COND TRUE E_1 == 1 [L210] __retres1 = 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND TRUE \read(tmp___0) [L511] t1_st = 0 [L224] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L227] COND TRUE t2_pc == 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L228] COND FALSE !(E_2 == 1) VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L237] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND FALSE !(\read(tmp___1)) [L243] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L246] COND TRUE t3_pc == 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L247] COND FALSE !(E_3 == 1) VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L256] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND FALSE !(\read(tmp___2)) [L61] E_1 = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L64] COND TRUE 1 [L66] m_pc = 1 [L67] m_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L357] COND TRUE t1_st == 0 [L358] int tmp_ndt_2; [L359] tmp_ndt_2 = __VERIFIER_nondet_int() [L360] COND TRUE \read(tmp_ndt_2) [L362] t1_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L86] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L89] COND TRUE t1_pc == 1 [L105] E_2 = 1 [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L189] COND TRUE m_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L190] COND FALSE !(M_E == 1) VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L199] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L208] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L209] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L218] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND FALSE !(\read(tmp___0)) [L224] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L227] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L228] COND TRUE E_2 == 1 [L229] __retres1 = 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND TRUE \read(tmp___1) [L519] t2_st = 0 [L243] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L246] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L247] COND FALSE !(E_3 == 1) VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L256] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND FALSE !(\read(tmp___2)) [L107] E_2 = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L97] COND TRUE 1 [L99] t1_pc = 1 [L100] t1_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L371] COND TRUE t2_st == 0 [L372] int tmp_ndt_3; [L373] tmp_ndt_3 = __VERIFIER_nondet_int() [L374] COND TRUE \read(tmp_ndt_3) [L376] t2_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L121] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L124] COND TRUE t2_pc == 1 [L140] E_3 = 1 [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L189] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L190] COND FALSE !(M_E == 1) VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L208] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L209] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND FALSE !(\read(tmp___0)) [L224] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L227] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L228] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L237] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND FALSE !(\read(tmp___1)) [L243] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L246] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L247] COND TRUE E_3 == 1 [L248] __retres1 = 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND TRUE \read(tmp___2) [L527] t3_st = 0 [L142] E_3 = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=0] [L132] COND TRUE 1 [L134] t2_pc = 1 [L135] t2_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=0] [L385] COND TRUE t3_st == 0 [L386] int tmp_ndt_4; [L387] tmp_ndt_4 = __VERIFIER_nondet_int() [L388] COND TRUE \read(tmp_ndt_4) [L390] t3_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] [L156] COND FALSE !(t3_pc == 0) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] [L159] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] [L13] reach_error() VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 129 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29310.9ms, OverallIterations: 29, TraceHistogramMax: 3, EmptinessCheckTime: 182.5ms, AutomataDifference: 10893.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6217 SDtfs, 7792 SDslu, 7837 SDs, 0 SdLazy, 1353 SolverSat, 362 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1251.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1195 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 760.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9118occurred in iteration=15, InterpolantAutomatonStates: 147, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7802.9ms AutomataMinimizationTime, 28 MinimizatonAttempts, 24466 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 240.3ms SsaConstructionTime, 825.2ms SatisfiabilityAnalysisTime, 6074.1ms InterpolantComputationTime, 2302 NumberOfCodeBlocks, 2302 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2677 ConstructedInterpolants, 0 QuantifiedInterpolants, 7718 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2457 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 42 InterpolantComputations, 34 PerfectInterpolantSequences, 531/545 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:01:56,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd70b1f6-79d4-440a-9293-8acdc7c097a5/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...