./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.02.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.02.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2cbfaf31aa56f767af01fea9a12ccb47d60ab19076d72b85e8ca46d6ff778e4c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:20:34,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:20:34,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:20:34,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:20:34,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:20:34,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:20:34,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:20:34,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:20:34,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:20:34,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:20:34,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:20:34,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:20:34,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:20:34,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:20:34,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:20:34,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:20:34,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:20:34,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:20:34,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:20:34,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:20:34,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:20:34,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:20:34,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:20:34,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:20:34,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:20:34,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:20:34,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:20:34,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:20:34,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:20:34,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:20:34,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:20:34,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:20:34,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:20:34,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:20:34,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:20:34,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:20:34,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:20:34,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:20:34,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:20:34,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:20:34,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:20:34,839 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:20:34,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:20:34,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:20:34,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:20:34,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:20:34,868 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:20:34,869 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:20:34,869 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:20:34,869 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:20:34,869 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:20:34,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:20:34,869 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:20:34,870 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:20:34,870 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:20:34,870 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:20:34,870 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:20:34,871 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:20:34,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:20:34,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:20:34,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:20:34,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:20:34,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:20:34,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:20:34,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:20:34,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:20:34,873 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:20:34,873 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:20:34,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:20:34,873 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:20:34,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:20:34,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:20:34,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:20:34,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:20:34,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:20:34,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:20:34,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:20:34,875 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:20:34,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:20:34,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:20:34,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:20:34,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:20:34,876 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_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cbfaf31aa56f767af01fea9a12ccb47d60ab19076d72b85e8ca46d6ff778e4c [2021-11-12 23:20:35,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:20:35,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:20:35,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:20:35,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:20:35,184 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:20:35,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/systemc/transmitter.02.cil.c [2021-11-12 23:20:35,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data/d14e37419/1f9c328ccaa84288a8a0b6d13e589f56/FLAG6f491ce95 [2021-11-12 23:20:35,774 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:20:35,774 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/sv-benchmarks/c/systemc/transmitter.02.cil.c [2021-11-12 23:20:35,784 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data/d14e37419/1f9c328ccaa84288a8a0b6d13e589f56/FLAG6f491ce95 [2021-11-12 23:20:36,145 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data/d14e37419/1f9c328ccaa84288a8a0b6d13e589f56 [2021-11-12 23:20:36,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:20:36,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:20:36,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:20:36,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:20:36,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:20:36,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac47197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36, skipping insertion in model container [2021-11-12 23:20:36,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:20:36,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:20:36,351 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_20c79794-6e16-4f0b-9929-7a57904bdf6b/sv-benchmarks/c/systemc/transmitter.02.cil.c[706,719] [2021-11-12 23:20:36,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:20:36,408 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:20:36,420 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_20c79794-6e16-4f0b-9929-7a57904bdf6b/sv-benchmarks/c/systemc/transmitter.02.cil.c[706,719] [2021-11-12 23:20:36,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:20:36,463 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:20:36,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36 WrapperNode [2021-11-12 23:20:36,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:20:36,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:20:36,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:20:36,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:20:36,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:20:36,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:20:36,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:20:36,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:20:36,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:20:36,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:20:36,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:20:36,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:20:36,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (1/1) ... [2021-11-12 23:20:36,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:20:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:36,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:20:36,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:20:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:20:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 23:20:36,664 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 23:20:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 23:20:36,665 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 23:20:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 23:20:36,665 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 23:20:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 23:20:36,666 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 23:20:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 23:20:36,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 23:20:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:20:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 23:20:36,666 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 23:20:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:20:36,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:20:37,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:20:37,278 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-12 23:20:37,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:20:37 BoogieIcfgContainer [2021-11-12 23:20:37,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:20:37,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:20:37,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:20:37,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:20:37,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:20:36" (1/3) ... [2021-11-12 23:20:37,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dce596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:20:37, skipping insertion in model container [2021-11-12 23:20:37,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:36" (2/3) ... [2021-11-12 23:20:37,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dce596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:20:37, skipping insertion in model container [2021-11-12 23:20:37,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:20:37" (3/3) ... [2021-11-12 23:20:37,289 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.02.cil.c [2021-11-12 23:20:37,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:20:37,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:20:37,344 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:20:37,351 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:20:37,352 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:20:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 53 states have (on average 1.490566037735849) internal successors, (79), 55 states have internal predecessors, (79), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-12 23:20:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-12 23:20:37,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:37,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:37,400 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:37,405 INFO L85 PathProgramCache]: Analyzing trace with hash 142617667, now seen corresponding path program 1 times [2021-11-12 23:20:37,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:37,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144459072] [2021-11-12 23:20:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:37,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:37,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:37,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144459072] [2021-11-12 23:20:37,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144459072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:37,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:37,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:20:37,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341142009] [2021-11-12 23:20:37,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:37,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:20:37,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:20:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:37,764 INFO L87 Difference]: Start difference. First operand has 76 states, 53 states have (on average 1.490566037735849) internal successors, (79), 55 states have internal predecessors, (79), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:20:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:37,979 INFO L93 Difference]: Finished difference Result 211 states and 309 transitions. [2021-11-12 23:20:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:20:37,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-11-12 23:20:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:37,991 INFO L225 Difference]: With dead ends: 211 [2021-11-12 23:20:37,992 INFO L226 Difference]: Without dead ends: 136 [2021-11-12 23:20:37,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:37,999 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 169 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.70ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:38,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 238 Invalid, 144 Unknown, 0 Unchecked, 5.70ms Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 150.93ms Time] [2021-11-12 23:20:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-12 23:20:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-11-12 23:20:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 96 states have internal predecessors, (128), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-12 23:20:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 178 transitions. [2021-11-12 23:20:38,061 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 178 transitions. Word has length 37 [2021-11-12 23:20:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:38,061 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 178 transitions. [2021-11-12 23:20:38,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:20:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 178 transitions. [2021-11-12 23:20:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-12 23:20:38,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:38,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:38,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:20:38,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1529899964, now seen corresponding path program 1 times [2021-11-12 23:20:38,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:38,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824614735] [2021-11-12 23:20:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:38,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:38,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:38,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824614735] [2021-11-12 23:20:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824614735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:38,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:38,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:20:38,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700367966] [2021-11-12 23:20:38,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:38,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:20:38,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:20:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:20:38,150 INFO L87 Difference]: Start difference. First operand 133 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:20:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:38,618 INFO L93 Difference]: Finished difference Result 441 states and 594 transitions. [2021-11-12 23:20:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:20:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-11-12 23:20:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:38,629 INFO L225 Difference]: With dead ends: 441 [2021-11-12 23:20:38,629 INFO L226 Difference]: Without dead ends: 297 [2021-11-12 23:20:38,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:38,641 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 302 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.38ms SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 337.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:38,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 386 Invalid, 351 Unknown, 0 Unchecked, 9.38ms Time], IncrementalHoareTripleChecker [116 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 337.99ms Time] [2021-11-12 23:20:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-12 23:20:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 287. [2021-11-12 23:20:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 208 states have (on average 1.3317307692307692) internal successors, (277), 207 states have internal predecessors, (277), 50 states have call successors, (50), 26 states have call predecessors, (50), 28 states have return successors, (54), 54 states have call predecessors, (54), 50 states have call successors, (54) [2021-11-12 23:20:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 381 transitions. [2021-11-12 23:20:38,723 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 381 transitions. Word has length 37 [2021-11-12 23:20:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:38,724 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 381 transitions. [2021-11-12 23:20:38,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:20:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 381 transitions. [2021-11-12 23:20:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 23:20:38,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:38,727 INFO L514 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] [2021-11-12 23:20:38,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:20:38,728 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:38,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1186920379, now seen corresponding path program 1 times [2021-11-12 23:20:38,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:38,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680012854] [2021-11-12 23:20:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:38,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:20:38,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:38,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680012854] [2021-11-12 23:20:38,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680012854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:38,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:38,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:20:38,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620889937] [2021-11-12 23:20:38,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:38,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:20:38,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:20:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:20:38,839 INFO L87 Difference]: Start difference. First operand 287 states and 381 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:20:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:39,138 INFO L93 Difference]: Finished difference Result 801 states and 1066 transitions. [2021-11-12 23:20:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:20:39,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-11-12 23:20:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:39,147 INFO L225 Difference]: With dead ends: 801 [2021-11-12 23:20:39,147 INFO L226 Difference]: Without dead ends: 520 [2021-11-12 23:20:39,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:20:39,156 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 254 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.53ms SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:39,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 257 Invalid, 271 Unknown, 0 Unchecked, 7.53ms Time], IncrementalHoareTripleChecker [95 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 201.35ms Time] [2021-11-12 23:20:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-12 23:20:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 466. [2021-11-12 23:20:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 341 states have (on average 1.316715542521994) internal successors, (449), 338 states have internal predecessors, (449), 76 states have call successors, (76), 44 states have call predecessors, (76), 48 states have return successors, (84), 84 states have call predecessors, (84), 76 states have call successors, (84) [2021-11-12 23:20:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 609 transitions. [2021-11-12 23:20:39,234 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 609 transitions. Word has length 49 [2021-11-12 23:20:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:39,251 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 609 transitions. [2021-11-12 23:20:39,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:20:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 609 transitions. [2021-11-12 23:20:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 23:20:39,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:39,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:39,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:20:39,254 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:39,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2062055345, now seen corresponding path program 1 times [2021-11-12 23:20:39,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:39,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673749885] [2021-11-12 23:20:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:39,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:20:39,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:39,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673749885] [2021-11-12 23:20:39,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673749885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:39,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:39,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:20:39,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35832030] [2021-11-12 23:20:39,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:39,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:20:39,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:39,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:20:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:20:39,368 INFO L87 Difference]: Start difference. First operand 466 states and 609 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:20:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:39,654 INFO L93 Difference]: Finished difference Result 1442 states and 1882 transitions. [2021-11-12 23:20:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:20:39,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2021-11-12 23:20:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:39,666 INFO L225 Difference]: With dead ends: 1442 [2021-11-12 23:20:39,666 INFO L226 Difference]: Without dead ends: 982 [2021-11-12 23:20:39,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:20:39,675 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 253 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.01ms SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:39,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 198 Invalid, 228 Unknown, 0 Unchecked, 5.01ms Time], IncrementalHoareTripleChecker [95 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 164.56ms Time] [2021-11-12 23:20:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-12 23:20:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 856. [2021-11-12 23:20:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 631 states have (on average 1.294770206022187) internal successors, (817), 626 states have internal predecessors, (817), 136 states have call successors, (136), 82 states have call predecessors, (136), 88 states have return successors, (148), 148 states have call predecessors, (148), 136 states have call successors, (148) [2021-11-12 23:20:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1101 transitions. [2021-11-12 23:20:39,790 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1101 transitions. Word has length 51 [2021-11-12 23:20:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:39,792 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1101 transitions. [2021-11-12 23:20:39,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:20:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1101 transitions. [2021-11-12 23:20:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-12 23:20:39,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:39,800 INFO L514 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] [2021-11-12 23:20:39,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:20:39,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2097110743, now seen corresponding path program 1 times [2021-11-12 23:20:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:39,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502100239] [2021-11-12 23:20:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:39,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:39,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:39,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502100239] [2021-11-12 23:20:39,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502100239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:39,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:39,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:20:39,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977895968] [2021-11-12 23:20:39,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:39,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:20:39,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:20:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:39,920 INFO L87 Difference]: Start difference. First operand 856 states and 1101 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:20:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:40,037 INFO L93 Difference]: Finished difference Result 1583 states and 2056 transitions. [2021-11-12 23:20:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:20:40,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2021-11-12 23:20:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:40,049 INFO L225 Difference]: With dead ends: 1583 [2021-11-12 23:20:40,049 INFO L226 Difference]: Without dead ends: 1098 [2021-11-12 23:20:40,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:40,051 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 49 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:40,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 216 Invalid, 49 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 39.43ms Time] [2021-11-12 23:20:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-11-12 23:20:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 924. [2021-11-12 23:20:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 687 states have (on average 1.2940320232896652) internal successors, (889), 682 states have internal predecessors, (889), 142 states have call successors, (142), 88 states have call predecessors, (142), 94 states have return successors, (154), 154 states have call predecessors, (154), 142 states have call successors, (154) [2021-11-12 23:20:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1185 transitions. [2021-11-12 23:20:40,140 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1185 transitions. Word has length 53 [2021-11-12 23:20:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:40,141 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1185 transitions. [2021-11-12 23:20:40,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 23:20:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1185 transitions. [2021-11-12 23:20:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:20:40,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:40,143 INFO L514 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] [2021-11-12 23:20:40,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:20:40,144 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash 955397737, now seen corresponding path program 1 times [2021-11-12 23:20:40,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:40,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413851998] [2021-11-12 23:20:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:40,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:20:40,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:40,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413851998] [2021-11-12 23:20:40,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413851998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:40,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:40,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:20:40,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853414298] [2021-11-12 23:20:40,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:40,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:20:40,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:40,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:20:40,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:40,196 INFO L87 Difference]: Start difference. First operand 924 states and 1185 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:40,323 INFO L93 Difference]: Finished difference Result 1593 states and 2062 transitions. [2021-11-12 23:20:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:20:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 59 [2021-11-12 23:20:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:40,332 INFO L225 Difference]: With dead ends: 1593 [2021-11-12 23:20:40,332 INFO L226 Difference]: Without dead ends: 1018 [2021-11-12 23:20:40,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:40,335 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 70 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.34ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:40,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 170 Invalid, 45 Unknown, 0 Unchecked, 1.34ms Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 39.73ms Time] [2021-11-12 23:20:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-11-12 23:20:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 808. [2021-11-12 23:20:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 601 states have (on average 1.2928452579034941) internal successors, (777), 602 states have internal predecessors, (777), 126 states have call successors, (126), 80 states have call predecessors, (126), 80 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2021-11-12 23:20:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1029 transitions. [2021-11-12 23:20:40,413 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1029 transitions. Word has length 59 [2021-11-12 23:20:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:40,415 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 1029 transitions. [2021-11-12 23:20:40,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1029 transitions. [2021-11-12 23:20:40,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:20:40,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:40,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:40,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:20:40,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash 942710371, now seen corresponding path program 1 times [2021-11-12 23:20:40,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:40,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219759327] [2021-11-12 23:20:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:40,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:20:40,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:40,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219759327] [2021-11-12 23:20:40,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219759327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:40,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:40,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:20:40,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092583420] [2021-11-12 23:20:40,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:40,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:20:40,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:20:40,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:40,525 INFO L87 Difference]: Start difference. First operand 808 states and 1029 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-12 23:20:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:40,653 INFO L93 Difference]: Finished difference Result 1999 states and 2552 transitions. [2021-11-12 23:20:40,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:20:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2021-11-12 23:20:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:40,662 INFO L225 Difference]: With dead ends: 1999 [2021-11-12 23:20:40,662 INFO L226 Difference]: Without dead ends: 1196 [2021-11-12 23:20:40,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:40,668 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 70 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:40,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 167 Invalid, 42 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 37.72ms Time] [2021-11-12 23:20:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-11-12 23:20:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1185. [2021-11-12 23:20:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 886 states have (on average 1.2697516930022574) internal successors, (1125), 887 states have internal predecessors, (1125), 181 states have call successors, (181), 117 states have call predecessors, (181), 117 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2021-11-12 23:20:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1487 transitions. [2021-11-12 23:20:40,763 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1487 transitions. Word has length 72 [2021-11-12 23:20:40,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:40,764 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1487 transitions. [2021-11-12 23:20:40,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-12 23:20:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1487 transitions. [2021-11-12 23:20:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:20:40,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:40,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:40,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:20:40,768 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1235491369, now seen corresponding path program 1 times [2021-11-12 23:20:40,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:40,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624816493] [2021-11-12 23:20:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:40,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 23:20:40,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:40,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624816493] [2021-11-12 23:20:40,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624816493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:40,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:40,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:20:40,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549964465] [2021-11-12 23:20:40,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:40,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:20:40,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:40,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:20:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:40,880 INFO L87 Difference]: Start difference. First operand 1185 states and 1487 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:41,066 INFO L93 Difference]: Finished difference Result 2207 states and 2798 transitions. [2021-11-12 23:20:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:20:41,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-11-12 23:20:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:41,077 INFO L225 Difference]: With dead ends: 2207 [2021-11-12 23:20:41,077 INFO L226 Difference]: Without dead ends: 1543 [2021-11-12 23:20:41,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:41,080 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 92 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.66ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:41,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 211 Invalid, 99 Unknown, 0 Unchecked, 3.66ms Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 75.05ms Time] [2021-11-12 23:20:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-11-12 23:20:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1495. [2021-11-12 23:20:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1172 states have (on average 1.2559726962457338) internal successors, (1472), 1173 states have internal predecessors, (1472), 181 states have call successors, (181), 141 states have call predecessors, (181), 141 states have return successors, (193), 181 states have call predecessors, (193), 181 states have call successors, (193) [2021-11-12 23:20:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 1846 transitions. [2021-11-12 23:20:41,226 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 1846 transitions. Word has length 73 [2021-11-12 23:20:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:41,226 INFO L470 AbstractCegarLoop]: Abstraction has 1495 states and 1846 transitions. [2021-11-12 23:20:41,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 1846 transitions. [2021-11-12 23:20:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:20:41,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:41,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:41,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:20:41,232 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:41,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:41,233 INFO L85 PathProgramCache]: Analyzing trace with hash -58887050, now seen corresponding path program 1 times [2021-11-12 23:20:41,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:41,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299627222] [2021-11-12 23:20:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:41,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:20:41,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:41,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299627222] [2021-11-12 23:20:41,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299627222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:41,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:41,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:20:41,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658135875] [2021-11-12 23:20:41,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:41,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:20:41,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:20:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:41,315 INFO L87 Difference]: Start difference. First operand 1495 states and 1846 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:20:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:41,522 INFO L93 Difference]: Finished difference Result 2302 states and 2904 transitions. [2021-11-12 23:20:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:20:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 73 [2021-11-12 23:20:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:41,531 INFO L225 Difference]: With dead ends: 2302 [2021-11-12 23:20:41,532 INFO L226 Difference]: Without dead ends: 1477 [2021-11-12 23:20:41,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:41,536 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 166 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:41,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 238 Invalid, 128 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 103.16ms Time] [2021-11-12 23:20:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-11-12 23:20:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1461. [2021-11-12 23:20:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1141 states have (on average 1.2261174408413673) internal successors, (1399), 1139 states have internal predecessors, (1399), 181 states have call successors, (181), 141 states have call predecessors, (181), 138 states have return successors, (190), 181 states have call predecessors, (190), 181 states have call successors, (190) [2021-11-12 23:20:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1770 transitions. [2021-11-12 23:20:41,673 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1770 transitions. Word has length 73 [2021-11-12 23:20:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:41,674 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 1770 transitions. [2021-11-12 23:20:41,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:20:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1770 transitions. [2021-11-12 23:20:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:20:41,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:41,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:41,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:20:41,687 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:41,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:41,688 INFO L85 PathProgramCache]: Analyzing trace with hash -676897299, now seen corresponding path program 1 times [2021-11-12 23:20:41,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:41,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651252179] [2021-11-12 23:20:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:41,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:20:41,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:41,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651252179] [2021-11-12 23:20:41,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651252179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:41,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:41,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:20:41,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273232267] [2021-11-12 23:20:41,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:41,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:20:41,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:41,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:20:41,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:41,739 INFO L87 Difference]: Start difference. First operand 1461 states and 1770 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:20:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:41,878 INFO L93 Difference]: Finished difference Result 2720 states and 3334 transitions. [2021-11-12 23:20:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:20:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2021-11-12 23:20:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:41,890 INFO L225 Difference]: With dead ends: 2720 [2021-11-12 23:20:41,890 INFO L226 Difference]: Without dead ends: 1706 [2021-11-12 23:20:41,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:41,893 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 40 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:41,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 202 Invalid, 48 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 34.95ms Time] [2021-11-12 23:20:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-11-12 23:20:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1572. [2021-11-12 23:20:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1234 states have (on average 1.233387358184765) internal successors, (1522), 1232 states have internal predecessors, (1522), 190 states have call successors, (190), 150 states have call predecessors, (190), 147 states have return successors, (199), 190 states have call predecessors, (199), 190 states have call successors, (199) [2021-11-12 23:20:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 1911 transitions. [2021-11-12 23:20:42,026 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 1911 transitions. Word has length 74 [2021-11-12 23:20:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:42,027 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 1911 transitions. [2021-11-12 23:20:42,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:20:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 1911 transitions. [2021-11-12 23:20:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:20:42,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:42,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:42,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:20:42,030 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2045377787, now seen corresponding path program 1 times [2021-11-12 23:20:42,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:42,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984315250] [2021-11-12 23:20:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:42,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:20:42,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:42,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984315250] [2021-11-12 23:20:42,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984315250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:42,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:42,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:20:42,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735888263] [2021-11-12 23:20:42,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:42,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:20:42,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:20:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:20:42,092 INFO L87 Difference]: Start difference. First operand 1572 states and 1911 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:20:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:42,377 INFO L93 Difference]: Finished difference Result 2940 states and 3596 transitions. [2021-11-12 23:20:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:20:42,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2021-11-12 23:20:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:42,390 INFO L225 Difference]: With dead ends: 2940 [2021-11-12 23:20:42,390 INFO L226 Difference]: Without dead ends: 2239 [2021-11-12 23:20:42,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:42,393 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 69 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:42,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 286 Invalid, 193 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [20 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 131.01ms Time] [2021-11-12 23:20:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-11-12 23:20:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2147. [2021-11-12 23:20:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 1680 states have (on average 1.2220238095238096) internal successors, (2053), 1669 states have internal predecessors, (2053), 268 states have call successors, (268), 210 states have call predecessors, (268), 198 states have return successors, (286), 268 states have call predecessors, (286), 268 states have call successors, (286) [2021-11-12 23:20:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 2607 transitions. [2021-11-12 23:20:42,578 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 2607 transitions. Word has length 74 [2021-11-12 23:20:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:42,578 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 2607 transitions. [2021-11-12 23:20:42,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:20:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 2607 transitions. [2021-11-12 23:20:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 23:20:42,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:42,584 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:42,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:20:42,585 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:42,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1399277634, now seen corresponding path program 1 times [2021-11-12 23:20:42,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:42,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779892814] [2021-11-12 23:20:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:42,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:20:42,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:42,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779892814] [2021-11-12 23:20:42,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779892814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:42,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060171500] [2021-11-12 23:20:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:42,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:42,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:42,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:42,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:20:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:42,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:20:42,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:20:43,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:20:43,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060171500] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:43,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:20:43,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 6] total 16 [2021-11-12 23:20:43,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409502260] [2021-11-12 23:20:43,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:43,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:20:43,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:20:43,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:20:43,602 INFO L87 Difference]: Start difference. First operand 2147 states and 2607 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:20:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:43,962 INFO L93 Difference]: Finished difference Result 3619 states and 4445 transitions. [2021-11-12 23:20:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:20:43,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 94 [2021-11-12 23:20:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:43,971 INFO L225 Difference]: With dead ends: 3619 [2021-11-12 23:20:43,971 INFO L226 Difference]: Without dead ends: 1478 [2021-11-12 23:20:43,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:20:43,977 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 205 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.86ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:43,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 695 Invalid, 247 Unknown, 0 Unchecked, 4.86ms Time], IncrementalHoareTripleChecker [18 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 137.53ms Time] [2021-11-12 23:20:43,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-11-12 23:20:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1103. [2021-11-12 23:20:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 879 states have (on average 1.2252559726962458) internal successors, (1077), 876 states have internal predecessors, (1077), 125 states have call successors, (125), 102 states have call predecessors, (125), 98 states have return successors, (131), 125 states have call predecessors, (131), 125 states have call successors, (131) [2021-11-12 23:20:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1333 transitions. [2021-11-12 23:20:44,064 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1333 transitions. Word has length 94 [2021-11-12 23:20:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:44,064 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1333 transitions. [2021-11-12 23:20:44,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:20:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1333 transitions. [2021-11-12 23:20:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:20:44,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:44,068 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:44,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:44,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-12 23:20:44,283 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:44,283 INFO L85 PathProgramCache]: Analyzing trace with hash -31031546, now seen corresponding path program 1 times [2021-11-12 23:20:44,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:44,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986530854] [2021-11-12 23:20:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:44,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:20:44,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:44,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986530854] [2021-11-12 23:20:44,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986530854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:44,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495317351] [2021-11-12 23:20:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:44,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:44,338 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:44,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:20:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:20:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:20:44,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:20:44,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495317351] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:44,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:20:44,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2021-11-12 23:20:44,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361001638] [2021-11-12 23:20:44,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:44,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:20:44,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:44,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:20:44,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:44,783 INFO L87 Difference]: Start difference. First operand 1103 states and 1333 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:44,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:44,904 INFO L93 Difference]: Finished difference Result 1795 states and 2209 transitions. [2021-11-12 23:20:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:20:44,904 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), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2021-11-12 23:20:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:44,911 INFO L225 Difference]: With dead ends: 1795 [2021-11-12 23:20:44,911 INFO L226 Difference]: Without dead ends: 1111 [2021-11-12 23:20:44,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:44,914 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 66 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:44,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 211 Invalid, 54 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 48.73ms Time] [2021-11-12 23:20:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-11-12 23:20:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1099. [2021-11-12 23:20:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 875 states have (on average 1.192) internal successors, (1043), 872 states have internal predecessors, (1043), 125 states have call successors, (125), 102 states have call predecessors, (125), 98 states have return successors, (131), 125 states have call predecessors, (131), 125 states have call successors, (131) [2021-11-12 23:20:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1299 transitions. [2021-11-12 23:20:45,006 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1299 transitions. Word has length 95 [2021-11-12 23:20:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:45,007 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1299 transitions. [2021-11-12 23:20:45,007 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), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1299 transitions. [2021-11-12 23:20:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:20:45,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:45,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:45,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:45,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-12 23:20:45,226 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:45,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:45,227 INFO L85 PathProgramCache]: Analyzing trace with hash -250707482, now seen corresponding path program 1 times [2021-11-12 23:20:45,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:45,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810777632] [2021-11-12 23:20:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:45,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:20:45,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:45,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810777632] [2021-11-12 23:20:45,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810777632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:45,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:45,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:20:45,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823283293] [2021-11-12 23:20:45,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:45,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:20:45,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:20:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:45,273 INFO L87 Difference]: Start difference. First operand 1099 states and 1299 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:20:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:45,411 INFO L93 Difference]: Finished difference Result 1775 states and 2132 transitions. [2021-11-12 23:20:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:20:45,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2021-11-12 23:20:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:45,418 INFO L225 Difference]: With dead ends: 1775 [2021-11-12 23:20:45,419 INFO L226 Difference]: Without dead ends: 1097 [2021-11-12 23:20:45,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:20:45,421 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 97 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:45,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 151 Invalid, 86 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 68.03ms Time] [2021-11-12 23:20:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-11-12 23:20:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2021-11-12 23:20:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 873 states have (on average 1.1718213058419245) internal successors, (1023), 870 states have internal predecessors, (1023), 125 states have call successors, (125), 102 states have call predecessors, (125), 98 states have return successors, (131), 125 states have call predecessors, (131), 125 states have call successors, (131) [2021-11-12 23:20:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1279 transitions. [2021-11-12 23:20:45,514 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1279 transitions. Word has length 95 [2021-11-12 23:20:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:45,514 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1279 transitions. [2021-11-12 23:20:45,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:20:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1279 transitions. [2021-11-12 23:20:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:20:45,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:45,518 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:45,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 23:20:45,519 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1805135809, now seen corresponding path program 1 times [2021-11-12 23:20:45,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:45,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796468889] [2021-11-12 23:20:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:45,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:20:45,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:20:45,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796468889] [2021-11-12 23:20:45,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796468889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:45,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663319454] [2021-11-12 23:20:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:45,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:20:45,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:45,614 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:20:45,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:20:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:45,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:20:45,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:20:46,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:20:46,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663319454] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:20:46,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:20:46,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 8 [2021-11-12 23:20:46,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232008374] [2021-11-12 23:20:46,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:46,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:20:46,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:20:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:20:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:20:46,415 INFO L87 Difference]: Start difference. First operand 1097 states and 1279 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:20:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:46,637 INFO L93 Difference]: Finished difference Result 2397 states and 2820 transitions. [2021-11-12 23:20:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:20:46,638 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), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2021-11-12 23:20:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:46,648 INFO L225 Difference]: With dead ends: 2397 [2021-11-12 23:20:46,648 INFO L226 Difference]: Without dead ends: 1738 [2021-11-12 23:20:46,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:20:46,653 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 112 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:46,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 200 Invalid, 89 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 83.04ms Time] [2021-11-12 23:20:46,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-11-12 23:20:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1267. [2021-11-12 23:20:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1018 states have (on average 1.1817288801571708) internal successors, (1203), 1017 states have internal predecessors, (1203), 137 states have call successors, (137), 114 states have call predecessors, (137), 111 states have return successors, (145), 136 states have call predecessors, (145), 137 states have call successors, (145) [2021-11-12 23:20:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1485 transitions. [2021-11-12 23:20:46,779 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1485 transitions. Word has length 96 [2021-11-12 23:20:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:46,779 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 1485 transitions. [2021-11-12 23:20:46,779 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), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:20:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1485 transitions. [2021-11-12 23:20:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:20:46,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:46,783 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:46,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:47,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-12 23:20:47,007 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:47,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1348095901, now seen corresponding path program 1 times [2021-11-12 23:20:47,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:20:47,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013681861] [2021-11-12 23:20:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:47,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:20:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:20:47,038 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:20:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:20:47,143 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:20:47,143 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:20:47,144 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:20:47,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 23:20:47,150 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:47,153 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:20:47,207 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-12 23:20:47,210 INFO L158 Benchmark]: Toolchain (without parser) took 11061.15ms. Allocated memory was 88.1MB in the beginning and 274.7MB in the end (delta: 186.6MB). Free memory was 53.5MB in the beginning and 140.7MB in the end (delta: -87.2MB). Peak memory consumption was 99.8MB. Max. memory is 16.1GB. [2021-11-12 23:20:47,211 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 88.1MB. Free memory was 60.2MB in the beginning and 60.2MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:20:47,211 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.07ms. Allocated memory was 88.1MB in the beginning and 111.1MB in the end (delta: 23.1MB). Free memory was 53.3MB in the beginning and 84.4MB in the end (delta: -31.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:20:47,211 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.99ms. Allocated memory is still 111.1MB. Free memory was 84.4MB in the beginning and 82.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:20:47,212 INFO L158 Benchmark]: Boogie Preprocessor took 58.00ms. Allocated memory is still 111.1MB. Free memory was 82.3MB in the beginning and 81.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:20:47,212 INFO L158 Benchmark]: RCFGBuilder took 706.58ms. Allocated memory is still 111.1MB. Free memory was 80.8MB in the beginning and 55.0MB in the end (delta: 25.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-11-12 23:20:47,213 INFO L158 Benchmark]: TraceAbstraction took 9926.49ms. Allocated memory was 111.1MB in the beginning and 274.7MB in the end (delta: 163.6MB). Free memory was 54.4MB in the beginning and 140.7MB in the end (delta: -86.3MB). Peak memory consumption was 79.5MB. Max. memory is 16.1GB. [2021-11-12 23:20:47,214 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 88.1MB. Free memory was 60.2MB in the beginning and 60.2MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 314.07ms. Allocated memory was 88.1MB in the beginning and 111.1MB in the end (delta: 23.1MB). Free memory was 53.3MB in the beginning and 84.4MB in the end (delta: -31.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.99ms. Allocated memory is still 111.1MB. Free memory was 84.4MB in the beginning and 82.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.00ms. Allocated memory is still 111.1MB. Free memory was 82.3MB in the beginning and 81.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 706.58ms. Allocated memory is still 111.1MB. Free memory was 80.8MB in the beginning and 55.0MB in the end (delta: 25.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 9926.49ms. Allocated memory was 111.1MB in the beginning and 274.7MB in the end (delta: 163.6MB). Free memory was 54.4MB in the beginning and 140.7MB in the end (delta: -86.3MB). Peak memory consumption was 79.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 23:20:47,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.02.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2cbfaf31aa56f767af01fea9a12ccb47d60ab19076d72b85e8ca46d6ff778e4c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:20:49,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:20:49,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:20:49,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:20:49,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:20:49,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:20:49,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:20:49,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:20:49,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:20:49,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:20:49,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:20:49,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:20:49,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:20:49,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:20:49,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:20:49,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:20:49,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:20:49,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:20:49,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:20:49,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:20:49,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:20:49,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:20:49,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:20:49,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:20:49,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:20:49,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:20:49,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:20:49,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:20:49,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:20:49,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:20:49,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:20:49,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:20:49,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:20:49,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:20:49,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:20:49,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:20:49,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:20:49,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:20:49,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:20:49,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:20:49,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:20:49,783 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:20:49,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:20:49,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:20:49,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:20:49,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:20:49,826 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:20:49,826 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:20:49,827 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:20:49,827 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:20:49,827 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:20:49,827 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:20:49,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:20:49,830 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:20:49,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:20:49,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:20:49,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:20:49,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:20:49,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:20:49,831 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:20:49,831 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:20:49,832 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:20:49,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:20:49,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:20:49,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:20:49,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:20:49,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:20:49,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:20:49,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:20:49,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:20:49,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:20:49,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:20:49,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:20:49,835 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:20:49,835 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:20:49,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:20:49,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:20:49,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:20:49,836 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cbfaf31aa56f767af01fea9a12ccb47d60ab19076d72b85e8ca46d6ff778e4c [2021-11-12 23:20:50,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:20:50,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:20:50,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:20:50,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:20:50,234 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:20:50,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/systemc/transmitter.02.cil.c [2021-11-12 23:20:50,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data/03785eabb/d7b5c848997941d2b46b5415ebd244f3/FLAG8c6e87baf [2021-11-12 23:20:50,921 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:20:50,924 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/sv-benchmarks/c/systemc/transmitter.02.cil.c [2021-11-12 23:20:50,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data/03785eabb/d7b5c848997941d2b46b5415ebd244f3/FLAG8c6e87baf [2021-11-12 23:20:51,269 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/data/03785eabb/d7b5c848997941d2b46b5415ebd244f3 [2021-11-12 23:20:51,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:20:51,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:20:51,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:20:51,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:20:51,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:20:51,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367e3332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51, skipping insertion in model container [2021-11-12 23:20:51,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:20:51,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:20:51,482 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_20c79794-6e16-4f0b-9929-7a57904bdf6b/sv-benchmarks/c/systemc/transmitter.02.cil.c[706,719] [2021-11-12 23:20:51,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:20:51,593 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:20:51,605 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_20c79794-6e16-4f0b-9929-7a57904bdf6b/sv-benchmarks/c/systemc/transmitter.02.cil.c[706,719] [2021-11-12 23:20:51,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:20:51,644 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:20:51,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51 WrapperNode [2021-11-12 23:20:51,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:20:51,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:20:51,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:20:51,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:20:51,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,688 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:20:51,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:20:51,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:20:51,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:20:51,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:20:51,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:20:51,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:20:51,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:20:51,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (1/1) ... [2021-11-12 23:20:51,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:20:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:20:51,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:20:51,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:20:51,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:20:51,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:20:51,850 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-12 23:20:51,850 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-12 23:20:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-12 23:20:51,852 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-12 23:20:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-12 23:20:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-12 23:20:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-12 23:20:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-12 23:20:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-12 23:20:51,854 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-12 23:20:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-12 23:20:51,854 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-12 23:20:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:20:51,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:20:52,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:20:52,354 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-12 23:20:52,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:20:52 BoogieIcfgContainer [2021-11-12 23:20:52,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:20:52,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:20:52,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:20:52,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:20:52,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:20:51" (1/3) ... [2021-11-12 23:20:52,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e45c5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:20:52, skipping insertion in model container [2021-11-12 23:20:52,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:20:51" (2/3) ... [2021-11-12 23:20:52,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e45c5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:20:52, skipping insertion in model container [2021-11-12 23:20:52,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:20:52" (3/3) ... [2021-11-12 23:20:52,366 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.02.cil.c [2021-11-12 23:20:52,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:20:52,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:20:52,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:20:52,451 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:20:52,451 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:20:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 105 states have (on average 1.561904761904762) internal successors, (164), 107 states have internal predecessors, (164), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-12 23:20:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:20:52,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:52,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:52,504 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:52,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2055872345, now seen corresponding path program 1 times [2021-11-12 23:20:52,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:52,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776787957] [2021-11-12 23:20:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:52,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:52,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:52,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:20:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:52,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:20:52,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:52,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:53,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:53,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776787957] [2021-11-12 23:20:53,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776787957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:53,161 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:53,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:20:53,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131409392] [2021-11-12 23:20:53,164 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:53,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:20:53,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:53,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:20:53,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:53,201 INFO L87 Difference]: Start difference. First operand has 128 states, 105 states have (on average 1.561904761904762) internal successors, (164), 107 states have internal predecessors, (164), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:20:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:53,296 INFO L93 Difference]: Finished difference Result 247 states and 375 transitions. [2021-11-12 23:20:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:20:53,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 67 [2021-11-12 23:20:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:53,309 INFO L225 Difference]: With dead ends: 247 [2021-11-12 23:20:53,309 INFO L226 Difference]: Without dead ends: 123 [2021-11-12 23:20:53,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:20:53,317 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 170 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:53,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 178 Invalid, 2 Unknown, 0 Unchecked, 8.18ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 11.28ms Time] [2021-11-12 23:20:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-12 23:20:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-12 23:20:53,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 101 states have (on average 1.4356435643564356) internal successors, (145), 102 states have internal predecessors, (145), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-12 23:20:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 175 transitions. [2021-11-12 23:20:53,372 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 175 transitions. Word has length 67 [2021-11-12 23:20:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:53,373 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 175 transitions. [2021-11-12 23:20:53,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:20:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 175 transitions. [2021-11-12 23:20:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:20:53,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:53,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:53,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:20:53,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:53,590 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:53,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:53,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1622143259, now seen corresponding path program 1 times [2021-11-12 23:20:53,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:53,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217599749] [2021-11-12 23:20:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:53,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:53,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:53,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:53,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:20:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:53,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:20:53,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:53,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:54,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:54,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217599749] [2021-11-12 23:20:54,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217599749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:54,125 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:54,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-12 23:20:54,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036769934] [2021-11-12 23:20:54,129 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:54,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:20:54,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:54,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:20:54,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:54,138 INFO L87 Difference]: Start difference. First operand 123 states and 175 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:54,597 INFO L93 Difference]: Finished difference Result 349 states and 507 transitions. [2021-11-12 23:20:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:20:54,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-11-12 23:20:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:54,603 INFO L225 Difference]: With dead ends: 349 [2021-11-12 23:20:54,603 INFO L226 Difference]: Without dead ends: 236 [2021-11-12 23:20:54,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:20:54,607 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 816 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 272.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.18ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 335.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:54,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 441 Invalid, 345 Unknown, 0 Unchecked, 15.18ms Time], IncrementalHoareTripleChecker [129 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 335.54ms Time] [2021-11-12 23:20:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-12 23:20:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2021-11-12 23:20:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 194 states have (on average 1.4381443298969072) internal successors, (279), 196 states have internal predecessors, (279), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2021-11-12 23:20:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 330 transitions. [2021-11-12 23:20:54,681 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 330 transitions. Word has length 67 [2021-11-12 23:20:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:54,682 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 330 transitions. [2021-11-12 23:20:54,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 330 transitions. [2021-11-12 23:20:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:20:54,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:54,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:54,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:20:54,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:54,905 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:54,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1762963514, now seen corresponding path program 1 times [2021-11-12 23:20:54,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:54,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584247195] [2021-11-12 23:20:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:54,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:54,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:54,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:54,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:20:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:54,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:20:54,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:55,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:55,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:55,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584247195] [2021-11-12 23:20:55,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584247195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:55,409 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:55,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-12 23:20:55,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155484696] [2021-11-12 23:20:55,410 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:55,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:20:55,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:20:55,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:55,411 INFO L87 Difference]: Start difference. First operand 233 states and 330 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:55,641 INFO L93 Difference]: Finished difference Result 456 states and 653 transitions. [2021-11-12 23:20:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:20:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-11-12 23:20:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:55,648 INFO L225 Difference]: With dead ends: 456 [2021-11-12 23:20:55,648 INFO L226 Difference]: Without dead ends: 233 [2021-11-12 23:20:55,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:20:55,654 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 345 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.41ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 175.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:55,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 327 Invalid, 164 Unknown, 0 Unchecked, 4.41ms Time], IncrementalHoareTripleChecker [55 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 175.85ms Time] [2021-11-12 23:20:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-12 23:20:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-12 23:20:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 194 states have (on average 1.402061855670103) internal successors, (272), 196 states have internal predecessors, (272), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2021-11-12 23:20:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 323 transitions. [2021-11-12 23:20:55,690 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 323 transitions. Word has length 67 [2021-11-12 23:20:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 323 transitions. [2021-11-12 23:20:55,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 323 transitions. [2021-11-12 23:20:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:20:55,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:55,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:55,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:55,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:55,903 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1515436166, now seen corresponding path program 1 times [2021-11-12 23:20:55,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:55,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673271681] [2021-11-12 23:20:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:55,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:55,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:55,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:20:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:55,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:20:55,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:56,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:56,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:56,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673271681] [2021-11-12 23:20:56,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673271681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:56,341 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:56,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-12 23:20:56,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937844169] [2021-11-12 23:20:56,341 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:56,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:20:56,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:20:56,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:56,343 INFO L87 Difference]: Start difference. First operand 233 states and 323 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:56,564 INFO L93 Difference]: Finished difference Result 456 states and 639 transitions. [2021-11-12 23:20:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:20:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-11-12 23:20:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:56,567 INFO L225 Difference]: With dead ends: 456 [2021-11-12 23:20:56,568 INFO L226 Difference]: Without dead ends: 233 [2021-11-12 23:20:56,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:20:56,576 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 336 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.36ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:56,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 320 Invalid, 164 Unknown, 0 Unchecked, 3.36ms Time], IncrementalHoareTripleChecker [55 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 182.77ms Time] [2021-11-12 23:20:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-12 23:20:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-12 23:20:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 194 states have (on average 1.365979381443299) internal successors, (265), 196 states have internal predecessors, (265), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2021-11-12 23:20:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 316 transitions. [2021-11-12 23:20:56,622 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 316 transitions. Word has length 67 [2021-11-12 23:20:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:56,624 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 316 transitions. [2021-11-12 23:20:56,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 316 transitions. [2021-11-12 23:20:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:20:56,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:56,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:56,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:56,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:56,845 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1205548998, now seen corresponding path program 1 times [2021-11-12 23:20:56,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:56,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130713180] [2021-11-12 23:20:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:56,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:56,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:56,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:56,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:20:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:56,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:20:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:57,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:57,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:57,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130713180] [2021-11-12 23:20:57,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130713180] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:57,298 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:57,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-12 23:20:57,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101793209] [2021-11-12 23:20:57,298 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:57,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:20:57,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:57,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:20:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:57,300 INFO L87 Difference]: Start difference. First operand 233 states and 316 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:57,578 INFO L93 Difference]: Finished difference Result 508 states and 700 transitions. [2021-11-12 23:20:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:20:57,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-11-12 23:20:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:57,581 INFO L225 Difference]: With dead ends: 508 [2021-11-12 23:20:57,581 INFO L226 Difference]: Without dead ends: 285 [2021-11-12 23:20:57,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:20:57,586 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 327 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.69ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 223.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:57,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 310 Invalid, 202 Unknown, 0 Unchecked, 3.69ms Time], IncrementalHoareTripleChecker [49 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 223.46ms Time] [2021-11-12 23:20:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-12 23:20:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-11-12 23:20:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 240 states have (on average 1.3291666666666666) internal successors, (319), 242 states have internal predecessors, (319), 27 states have call successors, (27), 16 states have call predecessors, (27), 17 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-12 23:20:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 374 transitions. [2021-11-12 23:20:57,635 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 374 transitions. Word has length 67 [2021-11-12 23:20:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:57,636 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 374 transitions. [2021-11-12 23:20:57,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:20:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 374 transitions. [2021-11-12 23:20:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:20:57,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:57,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:57,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:57,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:57,851 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash -348963367, now seen corresponding path program 1 times [2021-11-12 23:20:57,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:57,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385565626] [2021-11-12 23:20:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:57,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:57,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:57,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:57,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:20:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:57,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:20:57,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:58,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:58,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:58,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385565626] [2021-11-12 23:20:58,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385565626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:58,220 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:58,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 23:20:58,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666247134] [2021-11-12 23:20:58,220 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:58,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:20:58,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:58,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:20:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:20:58,222 INFO L87 Difference]: Start difference. First operand 285 states and 374 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:58,297 INFO L93 Difference]: Finished difference Result 629 states and 842 transitions. [2021-11-12 23:20:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:20:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-11-12 23:20:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:58,301 INFO L225 Difference]: With dead ends: 629 [2021-11-12 23:20:58,301 INFO L226 Difference]: Without dead ends: 355 [2021-11-12 23:20:58,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:58,303 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 90 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:58,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 695 Invalid, 14 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 11.66ms Time] [2021-11-12 23:20:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-12 23:20:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 291. [2021-11-12 23:20:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 246 states have (on average 1.3130081300813008) internal successors, (323), 248 states have internal predecessors, (323), 27 states have call successors, (27), 16 states have call predecessors, (27), 17 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-12 23:20:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 378 transitions. [2021-11-12 23:20:58,351 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 378 transitions. Word has length 67 [2021-11-12 23:20:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:58,351 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 378 transitions. [2021-11-12 23:20:58,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 378 transitions. [2021-11-12 23:20:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:20:58,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:58,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:58,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:58,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:58,564 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:58,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:58,565 INFO L85 PathProgramCache]: Analyzing trace with hash -100816873, now seen corresponding path program 1 times [2021-11-12 23:20:58,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:58,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862567513] [2021-11-12 23:20:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:58,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:58,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:58,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:20:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:20:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:58,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:58,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:58,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862567513] [2021-11-12 23:20:58,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862567513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:58,913 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:58,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 23:20:58,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762708571] [2021-11-12 23:20:58,913 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:58,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:20:58,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:58,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:20:58,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:20:58,915 INFO L87 Difference]: Start difference. First operand 291 states and 378 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:58,990 INFO L93 Difference]: Finished difference Result 655 states and 868 transitions. [2021-11-12 23:20:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:20:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-11-12 23:20:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:58,994 INFO L225 Difference]: With dead ends: 655 [2021-11-12 23:20:58,994 INFO L226 Difference]: Without dead ends: 375 [2021-11-12 23:20:58,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:58,996 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 50 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.57ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:58,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 667 Invalid, 14 Unknown, 0 Unchecked, 2.57ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 12.39ms Time] [2021-11-12 23:20:58,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-12 23:20:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 303. [2021-11-12 23:20:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 258 states have (on average 1.2984496124031009) internal successors, (335), 260 states have internal predecessors, (335), 27 states have call successors, (27), 16 states have call predecessors, (27), 17 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-12 23:20:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 390 transitions. [2021-11-12 23:20:59,038 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 390 transitions. Word has length 67 [2021-11-12 23:20:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:59,039 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 390 transitions. [2021-11-12 23:20:59,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 390 transitions. [2021-11-12 23:20:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:20:59,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:59,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:59,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:59,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:59,252 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:59,252 INFO L85 PathProgramCache]: Analyzing trace with hash -495183659, now seen corresponding path program 1 times [2021-11-12 23:20:59,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:59,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147521934] [2021-11-12 23:20:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:59,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:59,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:59,254 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:59,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:20:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:59,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:20:59,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:20:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:59,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:20:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:20:59,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:20:59,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147521934] [2021-11-12 23:20:59,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147521934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:20:59,523 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:20:59,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-12 23:20:59,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131545310] [2021-11-12 23:20:59,524 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:20:59,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:20:59,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:20:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:20:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:20:59,525 INFO L87 Difference]: Start difference. First operand 303 states and 390 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:20:59,585 INFO L93 Difference]: Finished difference Result 609 states and 792 transitions. [2021-11-12 23:20:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:20:59,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-11-12 23:20:59,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:20:59,589 INFO L225 Difference]: With dead ends: 609 [2021-11-12 23:20:59,589 INFO L226 Difference]: Without dead ends: 317 [2021-11-12 23:20:59,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:20:59,591 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 10 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.10ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:20:59,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 655 Invalid, 14 Unknown, 0 Unchecked, 3.10ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 10.25ms Time] [2021-11-12 23:20:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-12 23:20:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 309. [2021-11-12 23:20:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 264 states have (on average 1.2840909090909092) internal successors, (339), 266 states have internal predecessors, (339), 27 states have call successors, (27), 16 states have call predecessors, (27), 17 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-12 23:20:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 394 transitions. [2021-11-12 23:20:59,626 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 394 transitions. Word has length 67 [2021-11-12 23:20:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:20:59,627 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 394 transitions. [2021-11-12 23:20:59,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:20:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 394 transitions. [2021-11-12 23:20:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:20:59,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:20:59,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:20:59,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:20:59,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:20:59,843 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:20:59,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:20:59,844 INFO L85 PathProgramCache]: Analyzing trace with hash -472551405, now seen corresponding path program 1 times [2021-11-12 23:20:59,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:20:59,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982881216] [2021-11-12 23:20:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:20:59,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:20:59,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:20:59,845 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:20:59,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:20:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:20:59,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:20:59,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:00,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:00,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:00,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982881216] [2021-11-12 23:21:00,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982881216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:00,323 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:00,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:21:00,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823023828] [2021-11-12 23:21:00,323 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:00,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:21:00,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:21:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:21:00,324 INFO L87 Difference]: Start difference. First operand 309 states and 394 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:21:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:00,592 INFO L93 Difference]: Finished difference Result 927 states and 1186 transitions. [2021-11-12 23:21:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:21:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 67 [2021-11-12 23:21:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:00,599 INFO L225 Difference]: With dead ends: 927 [2021-11-12 23:21:00,599 INFO L226 Difference]: Without dead ends: 630 [2021-11-12 23:21:00,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:21:00,602 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 272 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.56ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:00,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 382 Invalid, 167 Unknown, 0 Unchecked, 6.56ms Time], IncrementalHoareTripleChecker [64 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 182.24ms Time] [2021-11-12 23:21:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-12 23:21:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 622. [2021-11-12 23:21:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 537 states have (on average 1.2700186219739293) internal successors, (682), 543 states have internal predecessors, (682), 49 states have call successors, (49), 30 states have call predecessors, (49), 35 states have return successors, (62), 50 states have call predecessors, (62), 49 states have call successors, (62) [2021-11-12 23:21:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 793 transitions. [2021-11-12 23:21:00,694 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 793 transitions. Word has length 67 [2021-11-12 23:21:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:00,694 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 793 transitions. [2021-11-12 23:21:00,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:21:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 793 transitions. [2021-11-12 23:21:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:21:00,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:00,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:00,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:00,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:00,907 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:00,907 INFO L85 PathProgramCache]: Analyzing trace with hash -241037013, now seen corresponding path program 1 times [2021-11-12 23:21:00,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:00,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549756096] [2021-11-12 23:21:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:00,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:00,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:00,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:00,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:21:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:00,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:21:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:01,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:01,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:01,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549756096] [2021-11-12 23:21:01,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549756096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:01,394 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:01,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:21:01,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174682699] [2021-11-12 23:21:01,394 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:01,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:21:01,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:21:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:21:01,395 INFO L87 Difference]: Start difference. First operand 622 states and 793 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:21:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:01,714 INFO L93 Difference]: Finished difference Result 1775 states and 2262 transitions. [2021-11-12 23:21:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:21:01,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2021-11-12 23:21:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:01,723 INFO L225 Difference]: With dead ends: 1775 [2021-11-12 23:21:01,724 INFO L226 Difference]: Without dead ends: 1171 [2021-11-12 23:21:01,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:21:01,726 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 194 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:01,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 511 Invalid, 167 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [43 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 183.89ms Time] [2021-11-12 23:21:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-11-12 23:21:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1086. [2021-11-12 23:21:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 929 states have (on average 1.2518837459634016) internal successors, (1163), 945 states have internal predecessors, (1163), 89 states have call successors, (89), 52 states have call predecessors, (89), 67 states have return successors, (134), 92 states have call predecessors, (134), 89 states have call successors, (134) [2021-11-12 23:21:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1386 transitions. [2021-11-12 23:21:01,843 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1386 transitions. Word has length 68 [2021-11-12 23:21:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:01,844 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1386 transitions. [2021-11-12 23:21:01,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:21:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1386 transitions. [2021-11-12 23:21:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:21:01,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:01,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:01,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:02,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:02,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:02,058 INFO L85 PathProgramCache]: Analyzing trace with hash -39213079, now seen corresponding path program 1 times [2021-11-12 23:21:02,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:02,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926329395] [2021-11-12 23:21:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:02,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:02,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:02,060 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:02,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:21:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:02,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:02,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:02,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:02,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926329395] [2021-11-12 23:21:02,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926329395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:02,386 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:02,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:21:02,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155945112] [2021-11-12 23:21:02,387 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:02,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:21:02,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:21:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:21:02,389 INFO L87 Difference]: Start difference. First operand 1086 states and 1386 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:21:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:02,494 INFO L93 Difference]: Finished difference Result 2146 states and 2730 transitions. [2021-11-12 23:21:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 68 [2021-11-12 23:21:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:02,511 INFO L225 Difference]: With dead ends: 2146 [2021-11-12 23:21:02,511 INFO L226 Difference]: Without dead ends: 1076 [2021-11-12 23:21:02,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:21:02,517 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 156 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:02,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 163 Invalid, 2 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 6.71ms Time] [2021-11-12 23:21:02,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-11-12 23:21:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1076. [2021-11-12 23:21:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 925 states have (on average 1.250810810810811) internal successors, (1157), 939 states have internal predecessors, (1157), 83 states have call successors, (83), 52 states have call predecessors, (83), 67 states have return successors, (126), 86 states have call predecessors, (126), 83 states have call successors, (126) [2021-11-12 23:21:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1366 transitions. [2021-11-12 23:21:02,621 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1366 transitions. Word has length 68 [2021-11-12 23:21:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:02,622 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 1366 transitions. [2021-11-12 23:21:02,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:21:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1366 transitions. [2021-11-12 23:21:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:21:02,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:02,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:02,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:02,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:02,834 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1602304156, now seen corresponding path program 1 times [2021-11-12 23:21:02,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:02,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609427207] [2021-11-12 23:21:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:02,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:02,836 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:02,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:21:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:02,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:02,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:03,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:03,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:03,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609427207] [2021-11-12 23:21:03,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609427207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:03,218 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:03,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 23:21:03,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334190583] [2021-11-12 23:21:03,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:03,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:21:03,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:21:03,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:21:03,220 INFO L87 Difference]: Start difference. First operand 1076 states and 1366 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 23:21:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:03,398 INFO L93 Difference]: Finished difference Result 3140 states and 4030 transitions. [2021-11-12 23:21:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 69 [2021-11-12 23:21:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:03,411 INFO L225 Difference]: With dead ends: 3140 [2021-11-12 23:21:03,412 INFO L226 Difference]: Without dead ends: 2080 [2021-11-12 23:21:03,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:21:03,417 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 88 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:03,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 313 Invalid, 10 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 9.23ms Time] [2021-11-12 23:21:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-11-12 23:21:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2064. [2021-11-12 23:21:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1770 states have (on average 1.235593220338983) internal successors, (2187), 1796 states have internal predecessors, (2187), 159 states have call successors, (159), 104 states have call predecessors, (159), 134 states have return successors, (245), 165 states have call predecessors, (245), 159 states have call successors, (245) [2021-11-12 23:21:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2591 transitions. [2021-11-12 23:21:03,622 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2591 transitions. Word has length 69 [2021-11-12 23:21:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:03,622 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 2591 transitions. [2021-11-12 23:21:03,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 23:21:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2591 transitions. [2021-11-12 23:21:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:21:03,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:03,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:03,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:03,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:03,837 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:03,837 INFO L85 PathProgramCache]: Analyzing trace with hash 721718035, now seen corresponding path program 1 times [2021-11-12 23:21:03,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:03,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028632777] [2021-11-12 23:21:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:03,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:03,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:03,839 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:03,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:21:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:03,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:04,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:21:04,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:04,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028632777] [2021-11-12 23:21:04,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028632777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:04,237 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:04,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:21:04,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978357225] [2021-11-12 23:21:04,237 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:04,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:04,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:04,239 INFO L87 Difference]: Start difference. First operand 2064 states and 2591 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-12 23:21:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:04,709 INFO L93 Difference]: Finished difference Result 7096 states and 8939 transitions. [2021-11-12 23:21:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:04,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 88 [2021-11-12 23:21:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:04,736 INFO L225 Difference]: With dead ends: 7096 [2021-11-12 23:21:04,736 INFO L226 Difference]: Without dead ends: 4078 [2021-11-12 23:21:04,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:04,746 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 257 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:04,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 660 Invalid, 52 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [14 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 80.27ms Time] [2021-11-12 23:21:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-11-12 23:21:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 4078. [2021-11-12 23:21:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 3498 states have (on average 1.2289879931389365) internal successors, (4299), 3548 states have internal predecessors, (4299), 311 states have call successors, (311), 208 states have call predecessors, (311), 268 states have return successors, (509), 323 states have call predecessors, (509), 311 states have call successors, (509) [2021-11-12 23:21:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 5119 transitions. [2021-11-12 23:21:05,131 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 5119 transitions. Word has length 88 [2021-11-12 23:21:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:05,131 INFO L470 AbstractCegarLoop]: Abstraction has 4078 states and 5119 transitions. [2021-11-12 23:21:05,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-12 23:21:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 5119 transitions. [2021-11-12 23:21:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:21:05,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:05,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:05,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:05,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:05,347 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash 935655023, now seen corresponding path program 1 times [2021-11-12 23:21:05,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:05,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691291554] [2021-11-12 23:21:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:05,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:05,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:05,349 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:05,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:21:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:05,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 23:21:05,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:21:05,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:05,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691291554] [2021-11-12 23:21:05,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691291554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:05,904 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:05,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 23:21:05,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547483151] [2021-11-12 23:21:05,904 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:05,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:21:05,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:05,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:21:05,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:21:05,906 INFO L87 Difference]: Start difference. First operand 4078 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:21:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:06,268 INFO L93 Difference]: Finished difference Result 8925 states and 11200 transitions. [2021-11-12 23:21:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:06,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 119 [2021-11-12 23:21:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:06,304 INFO L225 Difference]: With dead ends: 8925 [2021-11-12 23:21:06,304 INFO L226 Difference]: Without dead ends: 4863 [2021-11-12 23:21:06,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:21:06,317 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 70 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:06,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 342 Invalid, 10 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 16.86ms Time] [2021-11-12 23:21:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-11-12 23:21:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4831. [2021-11-12 23:21:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4133 states have (on average 1.221146866682797) internal successors, (5047), 4189 states have internal predecessors, (5047), 379 states have call successors, (379), 252 states have call predecessors, (379), 318 states have return successors, (599), 391 states have call predecessors, (599), 379 states have call successors, (599) [2021-11-12 23:21:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 6025 transitions. [2021-11-12 23:21:06,878 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 6025 transitions. Word has length 119 [2021-11-12 23:21:06,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:06,878 INFO L470 AbstractCegarLoop]: Abstraction has 4831 states and 6025 transitions. [2021-11-12 23:21:06,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:21:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 6025 transitions. [2021-11-12 23:21:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:21:06,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:06,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:06,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:07,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:07,097 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:07,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1170571096, now seen corresponding path program 1 times [2021-11-12 23:21:07,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:07,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515250147] [2021-11-12 23:21:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:07,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:07,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:07,099 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:07,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:21:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:07,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:07,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:21:07,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:21:07,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:07,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515250147] [2021-11-12 23:21:07,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515250147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:07,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:07,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:21:07,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041466419] [2021-11-12 23:21:07,555 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:07,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:07,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:07,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:07,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:07,557 INFO L87 Difference]: Start difference. First operand 4831 states and 6025 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:21:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:07,985 INFO L93 Difference]: Finished difference Result 9202 states and 11493 transitions. [2021-11-12 23:21:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 123 [2021-11-12 23:21:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:08,023 INFO L225 Difference]: With dead ends: 9202 [2021-11-12 23:21:08,024 INFO L226 Difference]: Without dead ends: 5142 [2021-11-12 23:21:08,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:08,041 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 252 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:08,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 464 Invalid, 33 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [21 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 51.54ms Time] [2021-11-12 23:21:08,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5142 states. [2021-11-12 23:21:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5142 to 4831. [2021-11-12 23:21:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4133 states have (on average 1.2153399467699009) internal successors, (5023), 4189 states have internal predecessors, (5023), 379 states have call successors, (379), 252 states have call predecessors, (379), 318 states have return successors, (575), 391 states have call predecessors, (575), 379 states have call successors, (575) [2021-11-12 23:21:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 5977 transitions. [2021-11-12 23:21:08,475 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 5977 transitions. Word has length 123 [2021-11-12 23:21:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:08,476 INFO L470 AbstractCegarLoop]: Abstraction has 4831 states and 5977 transitions. [2021-11-12 23:21:08,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-12 23:21:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 5977 transitions. [2021-11-12 23:21:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:21:08,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:08,484 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:08,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:08,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:08,696 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -970215938, now seen corresponding path program 1 times [2021-11-12 23:21:08,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:08,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023326038] [2021-11-12 23:21:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:08,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:08,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:08,699 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:08,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:21:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:08,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:21:08,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:21:09,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:09,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023326038] [2021-11-12 23:21:09,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023326038] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:21:09,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:21:09,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-12 23:21:09,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044960656] [2021-11-12 23:21:09,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:09,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:21:09,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:09,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:21:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:09,267 INFO L87 Difference]: Start difference. First operand 4831 states and 5977 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:21:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:09,931 INFO L93 Difference]: Finished difference Result 11576 states and 14707 transitions. [2021-11-12 23:21:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:21:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 154 [2021-11-12 23:21:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:09,968 INFO L225 Difference]: With dead ends: 11576 [2021-11-12 23:21:09,968 INFO L226 Difference]: Without dead ends: 5827 [2021-11-12 23:21:09,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:09,985 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 123 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:09,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 315 Invalid, 12 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 15.53ms Time] [2021-11-12 23:21:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5827 states. [2021-11-12 23:21:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5827 to 5827. [2021-11-12 23:21:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5827 states, 4986 states have (on average 1.2049739269955877) internal successors, (6008), 5054 states have internal predecessors, (6008), 455 states have call successors, (455), 304 states have call predecessors, (455), 385 states have return successors, (737), 470 states have call predecessors, (737), 455 states have call successors, (737) [2021-11-12 23:21:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 7200 transitions. [2021-11-12 23:21:10,430 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 7200 transitions. Word has length 154 [2021-11-12 23:21:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:10,431 INFO L470 AbstractCegarLoop]: Abstraction has 5827 states and 7200 transitions. [2021-11-12 23:21:10,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:21:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 7200 transitions. [2021-11-12 23:21:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-12 23:21:10,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:10,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:10,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:10,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:10,651 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:10,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:10,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1358937995, now seen corresponding path program 1 times [2021-11-12 23:21:10,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:10,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297442159] [2021-11-12 23:21:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:10,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:10,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:10,654 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:10,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:21:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:10,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:10,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:21:11,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:21:11,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:11,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297442159] [2021-11-12 23:21:11,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297442159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:11,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:11,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 4 [2021-11-12 23:21:11,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116208538] [2021-11-12 23:21:11,274 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:11,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:11,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:11,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:11,275 INFO L87 Difference]: Start difference. First operand 5827 states and 7200 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:21:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:11,977 INFO L93 Difference]: Finished difference Result 16695 states and 21088 transitions. [2021-11-12 23:21:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:11,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 155 [2021-11-12 23:21:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:12,026 INFO L225 Difference]: With dead ends: 16695 [2021-11-12 23:21:12,026 INFO L226 Difference]: Without dead ends: 10884 [2021-11-12 23:21:12,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:12,052 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 265 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.68ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:12,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 527 Invalid, 72 Unknown, 0 Unchecked, 2.68ms Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 86.43ms Time] [2021-11-12 23:21:12,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10884 states. [2021-11-12 23:21:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10884 to 10833. [2021-11-12 23:21:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9268 states have (on average 1.1847216227880881) internal successors, (10980), 9380 states have internal predecessors, (10980), 855 states have call successors, (855), 584 states have call predecessors, (855), 709 states have return successors, (1291), 870 states have call predecessors, (1291), 855 states have call successors, (1291) [2021-11-12 23:21:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 13126 transitions. [2021-11-12 23:21:13,063 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 13126 transitions. Word has length 155 [2021-11-12 23:21:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:13,064 INFO L470 AbstractCegarLoop]: Abstraction has 10833 states and 13126 transitions. [2021-11-12 23:21:13,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:21:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 13126 transitions. [2021-11-12 23:21:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:21:13,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:13,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:13,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:13,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:13,285 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:13,285 INFO L85 PathProgramCache]: Analyzing trace with hash 217702764, now seen corresponding path program 1 times [2021-11-12 23:21:13,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:13,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745573793] [2021-11-12 23:21:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:13,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:13,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:13,287 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:13,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:21:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:21:13,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:13,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:21:13,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:21:13,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:13,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745573793] [2021-11-12 23:21:13,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745573793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:13,944 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:13,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 4 [2021-11-12 23:21:13,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581771248] [2021-11-12 23:21:13,945 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:13,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:21:13,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:21:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:13,947 INFO L87 Difference]: Start difference. First operand 10833 states and 13126 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:21:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:14,602 INFO L93 Difference]: Finished difference Result 20263 states and 24951 transitions. [2021-11-12 23:21:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:14,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 156 [2021-11-12 23:21:14,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:14,646 INFO L225 Difference]: With dead ends: 20263 [2021-11-12 23:21:14,646 INFO L226 Difference]: Without dead ends: 10865 [2021-11-12 23:21:14,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:21:14,672 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 212 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:14,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 507 Invalid, 66 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 91.25ms Time] [2021-11-12 23:21:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10865 states. [2021-11-12 23:21:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10865 to 10833. [2021-11-12 23:21:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9268 states have (on average 1.1615235217954252) internal successors, (10765), 9380 states have internal predecessors, (10765), 855 states have call successors, (855), 584 states have call predecessors, (855), 709 states have return successors, (1291), 870 states have call predecessors, (1291), 855 states have call successors, (1291) [2021-11-12 23:21:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 12911 transitions. [2021-11-12 23:21:15,574 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 12911 transitions. Word has length 156 [2021-11-12 23:21:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:15,575 INFO L470 AbstractCegarLoop]: Abstraction has 10833 states and 12911 transitions. [2021-11-12 23:21:15,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:21:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 12911 transitions. [2021-11-12 23:21:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:21:15,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:15,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:15,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:15,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:15,796 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1852604969, now seen corresponding path program 2 times [2021-11-12 23:21:15,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:15,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682504698] [2021-11-12 23:21:15,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:21:15,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:15,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:15,798 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:15,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:21:15,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:21:15,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:21:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:21:15,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:21:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:21:16,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:21:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:21:16,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:21:16,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682504698] [2021-11-12 23:21:16,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682504698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:21:16,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:21:16,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 5 [2021-11-12 23:21:16,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255240551] [2021-11-12 23:21:16,358 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:21:16,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:21:16,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:21:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:21:16,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:21:16,360 INFO L87 Difference]: Start difference. First operand 10833 states and 12911 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:21:16,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:21:16,679 INFO L93 Difference]: Finished difference Result 16076 states and 19362 transitions. [2021-11-12 23:21:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:21:16,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2021-11-12 23:21:16,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:21:16,690 INFO L225 Difference]: With dead ends: 16076 [2021-11-12 23:21:16,690 INFO L226 Difference]: Without dead ends: 2719 [2021-11-12 23:21:16,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:21:16,712 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 269 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:21:16,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 325 Invalid, 80 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [35 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 64.26ms Time] [2021-11-12 23:21:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-11-12 23:21:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2713. [2021-11-12 23:21:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2304 states have (on average 1.0863715277777777) internal successors, (2503), 2324 states have internal predecessors, (2503), 233 states have call successors, (233), 156 states have call predecessors, (233), 175 states have return successors, (297), 234 states have call predecessors, (297), 233 states have call successors, (297) [2021-11-12 23:21:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3033 transitions. [2021-11-12 23:21:16,973 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3033 transitions. Word has length 156 [2021-11-12 23:21:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:21:16,973 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 3033 transitions. [2021-11-12 23:21:16,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:21:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3033 transitions. [2021-11-12 23:21:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 23:21:16,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:21:16,980 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:16,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:17,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:17,191 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:21:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:21:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -217774742, now seen corresponding path program 1 times [2021-11-12 23:21:17,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:21:17,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046298728] [2021-11-12 23:21:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:21:17,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:21:17,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:21:17,194 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:21:17,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:21:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:21:17,301 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:21:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:21:17,644 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-12 23:21:17,644 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:21:17,645 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:21:17,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:21:17,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:21:17,862 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:21:17,866 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:21:17,923 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-12 23:21:17,928 INFO L158 Benchmark]: Toolchain (without parser) took 26655.28ms. Allocated memory was 56.6MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 34.4MB in the beginning and 939.0MB in the end (delta: -904.7MB). Peak memory consumption was 183.1MB. Max. memory is 16.1GB. [2021-11-12 23:21:17,931 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 56.6MB. Free memory was 38.1MB in the beginning and 38.1MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:21:17,931 INFO L158 Benchmark]: CACSL2BoogieTranslator took 370.89ms. Allocated memory is still 56.6MB. Free memory was 34.1MB in the beginning and 36.3MB in the end (delta: -2.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:21:17,931 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.75ms. Allocated memory is still 56.6MB. Free memory was 36.3MB in the beginning and 34.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:21:17,932 INFO L158 Benchmark]: Boogie Preprocessor took 64.60ms. Allocated memory is still 56.6MB. Free memory was 34.1MB in the beginning and 32.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:21:17,932 INFO L158 Benchmark]: RCFGBuilder took 602.55ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 32.3MB in the beginning and 44.4MB in the end (delta: -12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:21:17,933 INFO L158 Benchmark]: TraceAbstraction took 25567.79ms. Allocated memory was 71.3MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 43.9MB in the beginning and 939.0MB in the end (delta: -895.1MB). Peak memory consumption was 177.8MB. Max. memory is 16.1GB. [2021-11-12 23:21:17,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 56.6MB. Free memory was 38.1MB in the beginning and 38.1MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 370.89ms. Allocated memory is still 56.6MB. Free memory was 34.1MB in the beginning and 36.3MB in the end (delta: -2.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.75ms. Allocated memory is still 56.6MB. Free memory was 36.3MB in the beginning and 34.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.60ms. Allocated memory is still 56.6MB. Free memory was 34.1MB in the beginning and 32.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 602.55ms. Allocated memory was 56.6MB in the beginning and 71.3MB in the end (delta: 14.7MB). Free memory was 32.3MB in the beginning and 44.4MB in the end (delta: -12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 25567.79ms. Allocated memory was 71.3MB in the beginning and 1.1GB in the end (delta: 1.1GB). Free memory was 43.9MB in the beginning and 939.0MB in the end (delta: -895.1MB). Peak memory consumption was 177.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 23:21:17,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c79794-6e16-4f0b-9929-7a57904bdf6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null