./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6768ec4cb10c0d030986cdc2e459713dbcdaadd .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 01:54:47,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 01:54:47,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 01:54:47,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 01:54:47,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 01:54:47,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 01:54:47,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 01:54:47,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 01:54:47,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 01:54:47,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 01:54:47,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 01:54:47,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 01:54:47,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 01:54:47,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 01:54:47,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 01:54:47,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 01:54:47,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 01:54:47,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 01:54:47,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 01:54:47,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 01:54:47,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 01:54:47,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 01:54:47,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 01:54:47,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 01:54:47,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 01:54:47,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 01:54:47,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 01:54:47,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 01:54:47,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 01:54:47,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 01:54:47,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 01:54:47,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 01:54:47,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 01:54:47,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 01:54:47,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 01:54:47,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 01:54:47,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 01:54:47,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 01:54:47,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 01:54:47,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 01:54:47,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 01:54:47,816 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 01:54:47,844 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 01:54:47,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 01:54:47,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 01:54:47,846 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 01:54:47,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 01:54:47,847 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 01:54:47,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 01:54:47,847 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 01:54:47,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 01:54:47,848 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 01:54:47,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 01:54:47,848 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 01:54:47,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 01:54:47,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 01:54:47,849 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 01:54:47,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 01:54:47,849 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 01:54:47,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 01:54:47,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 01:54:47,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 01:54:47,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 01:54:47,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 01:54:47,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 01:54:47,851 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 01:54:47,851 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 01:54:47,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 01:54:47,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 01:54:47,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 01:54:47,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 01:54:47,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 01:54:47,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:47,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 01:54:47,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 01:54:47,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 01:54:47,853 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 01:54:47,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 01:54:47,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 01:54:47,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 01:54:47,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 01:54:47,854 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_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6768ec4cb10c0d030986cdc2e459713dbcdaadd [2021-10-16 01:54:48,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 01:54:48,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 01:54:48,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 01:54:48,166 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 01:54:48,167 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 01:54:48,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/systemc/transmitter.03.cil.c [2021-10-16 01:54:48,253 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/data/11af6e67d/abe04aee2c6f4989bdf02cc080c6ae24/FLAG709f79be2 [2021-10-16 01:54:48,672 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 01:54:48,673 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/sv-benchmarks/c/systemc/transmitter.03.cil.c [2021-10-16 01:54:48,682 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/data/11af6e67d/abe04aee2c6f4989bdf02cc080c6ae24/FLAG709f79be2 [2021-10-16 01:54:49,054 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/data/11af6e67d/abe04aee2c6f4989bdf02cc080c6ae24 [2021-10-16 01:54:49,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 01:54:49,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 01:54:49,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:49,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 01:54:49,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 01:54:49,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83c28b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49, skipping insertion in model container [2021-10-16 01:54:49,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 01:54:49,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 01:54:49,302 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_bae0fbfc-bfce-4261-a162-16fa64cf2c14/sv-benchmarks/c/systemc/transmitter.03.cil.c[401,414] [2021-10-16 01:54:49,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:49,371 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 01:54:49,381 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_bae0fbfc-bfce-4261-a162-16fa64cf2c14/sv-benchmarks/c/systemc/transmitter.03.cil.c[401,414] [2021-10-16 01:54:49,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 01:54:49,432 INFO L208 MainTranslator]: Completed translation [2021-10-16 01:54:49,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49 WrapperNode [2021-10-16 01:54:49,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 01:54:49,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:49,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 01:54:49,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 01:54:49,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 01:54:49,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 01:54:49,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 01:54:49,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 01:54:49,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 01:54:49,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 01:54:49,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 01:54:49,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 01:54:49,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (1/1) ... [2021-10-16 01:54:49,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 01:54:49,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:49,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 01:54:49,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 01:54:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 01:54:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 01:54:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 01:54:49,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 01:54:51,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 01:54:51,343 INFO L299 CfgBuilder]: Removed 119 assume(true) statements. [2021-10-16 01:54:51,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:51 BoogieIcfgContainer [2021-10-16 01:54:51,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 01:54:51,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 01:54:51,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 01:54:51,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 01:54:51,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:54:49" (1/3) ... [2021-10-16 01:54:51,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da1c5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:51, skipping insertion in model container [2021-10-16 01:54:51,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:54:49" (2/3) ... [2021-10-16 01:54:51,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da1c5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:54:51, skipping insertion in model container [2021-10-16 01:54:51,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:51" (3/3) ... [2021-10-16 01:54:51,359 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.03.cil.c [2021-10-16 01:54:51,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 01:54:51,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 01:54:51,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 01:54:51,426 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 01:54:51,427 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 01:54:51,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 128 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 01:54:51,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:51,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:51,463 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:51,473 INFO L82 PathProgramCache]: Analyzing trace with hash -353893713, now seen corresponding path program 1 times [2021-10-16 01:54:51,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:51,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352524826] [2021-10-16 01:54:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:51,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:51,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:51,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352524826] [2021-10-16 01:54:51,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352524826] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:51,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:51,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 01:54:51,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469664639] [2021-10-16 01:54:51,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:54:51,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:54:51,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:51,770 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 128 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:51,885 INFO L93 Difference]: Finished difference Result 343 states and 529 transitions. [2021-10-16 01:54:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:54:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 01:54:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:51,897 INFO L225 Difference]: With dead ends: 343 [2021-10-16 01:54:51,898 INFO L226 Difference]: Without dead ends: 216 [2021-10-16 01:54:51,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-10-16 01:54:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2021-10-16 01:54:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4952830188679245) internal successors, (317), 212 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 317 transitions. [2021-10-16 01:54:51,952 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 317 transitions. Word has length 24 [2021-10-16 01:54:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:51,952 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 317 transitions. [2021-10-16 01:54:51,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 317 transitions. [2021-10-16 01:54:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 01:54:51,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:51,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:51,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 01:54:51,955 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash 307440078, now seen corresponding path program 1 times [2021-10-16 01:54:51,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:51,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126985995] [2021-10-16 01:54:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:51,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:52,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:52,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126985995] [2021-10-16 01:54:52,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126985995] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:52,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:52,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 01:54:52,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413508902] [2021-10-16 01:54:52,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:54:52,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:54:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:52,017 INFO L87 Difference]: Start difference. First operand 213 states and 317 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:52,105 INFO L93 Difference]: Finished difference Result 598 states and 890 transitions. [2021-10-16 01:54:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:54:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 01:54:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:52,113 INFO L225 Difference]: With dead ends: 598 [2021-10-16 01:54:52,113 INFO L226 Difference]: Without dead ends: 398 [2021-10-16 01:54:52,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-10-16 01:54:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2021-10-16 01:54:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.460759493670886) internal successors, (577), 395 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 577 transitions. [2021-10-16 01:54:52,170 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 577 transitions. Word has length 24 [2021-10-16 01:54:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:52,170 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 577 transitions. [2021-10-16 01:54:52,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 577 transitions. [2021-10-16 01:54:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-16 01:54:52,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:52,174 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:52,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 01:54:52,174 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:52,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1943490319, now seen corresponding path program 1 times [2021-10-16 01:54:52,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:52,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217086124] [2021-10-16 01:54:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:52,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 01:54:52,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:52,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217086124] [2021-10-16 01:54:52,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217086124] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:52,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:52,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:54:52,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379082530] [2021-10-16 01:54:52,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:54:52,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:54:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:52,272 INFO L87 Difference]: Start difference. First operand 396 states and 577 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:52,389 INFO L93 Difference]: Finished difference Result 1352 states and 1970 transitions. [2021-10-16 01:54:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:54:52,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-16 01:54:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:52,396 INFO L225 Difference]: With dead ends: 1352 [2021-10-16 01:54:52,396 INFO L226 Difference]: Without dead ends: 971 [2021-10-16 01:54:52,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-10-16 01:54:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 695. [2021-10-16 01:54:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.4610951008645534) internal successors, (1014), 694 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1014 transitions. [2021-10-16 01:54:52,437 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1014 transitions. Word has length 33 [2021-10-16 01:54:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:52,437 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1014 transitions. [2021-10-16 01:54:52,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1014 transitions. [2021-10-16 01:54:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-16 01:54:52,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:52,440 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:52,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 01:54:52,441 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash 637142437, now seen corresponding path program 1 times [2021-10-16 01:54:52,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:52,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318884792] [2021-10-16 01:54:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:52,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 01:54:52,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:52,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318884792] [2021-10-16 01:54:52,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318884792] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:52,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:52,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:54:52,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279847723] [2021-10-16 01:54:52,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:54:52,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:52,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:54:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:52,522 INFO L87 Difference]: Start difference. First operand 695 states and 1014 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:52,647 INFO L93 Difference]: Finished difference Result 1943 states and 2847 transitions. [2021-10-16 01:54:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:54:52,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-16 01:54:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:52,656 INFO L225 Difference]: With dead ends: 1943 [2021-10-16 01:54:52,656 INFO L226 Difference]: Without dead ends: 1263 [2021-10-16 01:54:52,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-10-16 01:54:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 996. [2021-10-16 01:54:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.4623115577889447) internal successors, (1455), 995 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1455 transitions. [2021-10-16 01:54:52,711 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1455 transitions. Word has length 35 [2021-10-16 01:54:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:52,711 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1455 transitions. [2021-10-16 01:54:52,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1455 transitions. [2021-10-16 01:54:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-16 01:54:52,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:52,713 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:52,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 01:54:52,714 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:52,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1671338993, now seen corresponding path program 1 times [2021-10-16 01:54:52,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:52,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714843487] [2021-10-16 01:54:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:52,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 01:54:52,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:52,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714843487] [2021-10-16 01:54:52,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714843487] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:52,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:52,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:54:52,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690729635] [2021-10-16 01:54:52,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:54:52,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:54:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:52,803 INFO L87 Difference]: Start difference. First operand 996 states and 1455 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:52,979 INFO L93 Difference]: Finished difference Result 3393 states and 4937 transitions. [2021-10-16 01:54:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:54:52,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-16 01:54:52,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:53,010 INFO L225 Difference]: With dead ends: 3393 [2021-10-16 01:54:53,010 INFO L226 Difference]: Without dead ends: 2412 [2021-10-16 01:54:53,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-10-16 01:54:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1745. [2021-10-16 01:54:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 1.4541284403669725) internal successors, (2536), 1744 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2536 transitions. [2021-10-16 01:54:53,116 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2536 transitions. Word has length 37 [2021-10-16 01:54:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:53,117 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 2536 transitions. [2021-10-16 01:54:53,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2536 transitions. [2021-10-16 01:54:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-16 01:54:53,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:53,120 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:53,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 01:54:53,120 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash 296640951, now seen corresponding path program 1 times [2021-10-16 01:54:53,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:53,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853912691] [2021-10-16 01:54:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:53,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:53,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:53,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853912691] [2021-10-16 01:54:53,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853912691] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:53,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:53,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:54:53,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375986733] [2021-10-16 01:54:53,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:54:53,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:54:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:53,222 INFO L87 Difference]: Start difference. First operand 1745 states and 2536 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:53,381 INFO L93 Difference]: Finished difference Result 3243 states and 4777 transitions. [2021-10-16 01:54:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:54:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-16 01:54:53,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:53,398 INFO L225 Difference]: With dead ends: 3243 [2021-10-16 01:54:53,398 INFO L226 Difference]: Without dead ends: 2351 [2021-10-16 01:54:53,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-10-16 01:54:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1893. [2021-10-16 01:54:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 1.4630021141649048) internal successors, (2768), 1892 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2768 transitions. [2021-10-16 01:54:53,510 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2768 transitions. Word has length 39 [2021-10-16 01:54:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:53,510 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2768 transitions. [2021-10-16 01:54:53,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2768 transitions. [2021-10-16 01:54:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-16 01:54:53,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:53,515 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:53,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 01:54:53,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1362809959, now seen corresponding path program 1 times [2021-10-16 01:54:53,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:53,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262283254] [2021-10-16 01:54:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:53,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-16 01:54:53,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:53,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262283254] [2021-10-16 01:54:53,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262283254] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:53,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:53,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 01:54:53,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395630681] [2021-10-16 01:54:53,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:54:53,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:53,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:54:53,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:53,624 INFO L87 Difference]: Start difference. First operand 1893 states and 2768 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:53,817 INFO L93 Difference]: Finished difference Result 4609 states and 6718 transitions. [2021-10-16 01:54:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:54:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-16 01:54:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:53,834 INFO L225 Difference]: With dead ends: 4609 [2021-10-16 01:54:53,835 INFO L226 Difference]: Without dead ends: 2725 [2021-10-16 01:54:53,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-10-16 01:54:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2705. [2021-10-16 01:54:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2705 states, 2704 states have (on average 1.4386094674556213) internal successors, (3890), 2704 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 3890 transitions. [2021-10-16 01:54:53,984 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 3890 transitions. Word has length 54 [2021-10-16 01:54:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:53,984 INFO L470 AbstractCegarLoop]: Abstraction has 2705 states and 3890 transitions. [2021-10-16 01:54:53,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 3890 transitions. [2021-10-16 01:54:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-16 01:54:53,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:53,991 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:53,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 01:54:53,991 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash -855675489, now seen corresponding path program 1 times [2021-10-16 01:54:53,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:53,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960194114] [2021-10-16 01:54:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:53,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 01:54:54,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:54,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960194114] [2021-10-16 01:54:54,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960194114] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:54,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:54,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:54:54,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523709733] [2021-10-16 01:54:54,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:54:54,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:54,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:54:54,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:54,037 INFO L87 Difference]: Start difference. First operand 2705 states and 3890 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:54,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:54,287 INFO L93 Difference]: Finished difference Result 7690 states and 11025 transitions. [2021-10-16 01:54:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:54:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-16 01:54:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:54,316 INFO L225 Difference]: With dead ends: 7690 [2021-10-16 01:54:54,316 INFO L226 Difference]: Without dead ends: 4987 [2021-10-16 01:54:54,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-10-16 01:54:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4949. [2021-10-16 01:54:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 1.404607922392886) internal successors, (6950), 4948 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 6950 transitions. [2021-10-16 01:54:54,647 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 6950 transitions. Word has length 54 [2021-10-16 01:54:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:54,648 INFO L470 AbstractCegarLoop]: Abstraction has 4949 states and 6950 transitions. [2021-10-16 01:54:54,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 6950 transitions. [2021-10-16 01:54:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-16 01:54:54,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:54,653 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:54,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 01:54:54,654 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash -969062146, now seen corresponding path program 1 times [2021-10-16 01:54:54,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:54,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246391275] [2021-10-16 01:54:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:54,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 01:54:54,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:54,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246391275] [2021-10-16 01:54:54,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246391275] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:54,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:54,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:54:54,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600604350] [2021-10-16 01:54:54,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:54:54,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:54:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:54,710 INFO L87 Difference]: Start difference. First operand 4949 states and 6950 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:55,107 INFO L93 Difference]: Finished difference Result 10721 states and 15232 transitions. [2021-10-16 01:54:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:54:55,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-16 01:54:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:55,146 INFO L225 Difference]: With dead ends: 10721 [2021-10-16 01:54:55,147 INFO L226 Difference]: Without dead ends: 6437 [2021-10-16 01:54:55,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6437 states. [2021-10-16 01:54:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6437 to 6285. [2021-10-16 01:54:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6285 states, 6284 states have (on average 1.4174092934436664) internal successors, (8907), 6284 states have internal predecessors, (8907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6285 states to 6285 states and 8907 transitions. [2021-10-16 01:54:55,567 INFO L78 Accepts]: Start accepts. Automaton has 6285 states and 8907 transitions. Word has length 54 [2021-10-16 01:54:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:55,567 INFO L470 AbstractCegarLoop]: Abstraction has 6285 states and 8907 transitions. [2021-10-16 01:54:55,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 6285 states and 8907 transitions. [2021-10-16 01:54:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-16 01:54:55,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:55,573 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:55,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 01:54:55,574 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2046580415, now seen corresponding path program 1 times [2021-10-16 01:54:55,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:55,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043061348] [2021-10-16 01:54:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:55,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:55,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:55,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043061348] [2021-10-16 01:54:55,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043061348] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:55,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:55,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:54:55,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126447676] [2021-10-16 01:54:55,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:54:55,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:54:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:55,614 INFO L87 Difference]: Start difference. First operand 6285 states and 8907 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:55,933 INFO L93 Difference]: Finished difference Result 9687 states and 13825 transitions. [2021-10-16 01:54:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:54:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-16 01:54:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:55,982 INFO L225 Difference]: With dead ends: 9687 [2021-10-16 01:54:55,982 INFO L226 Difference]: Without dead ends: 6285 [2021-10-16 01:54:55,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2021-10-16 01:54:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6179. [2021-10-16 01:54:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6179 states, 6178 states have (on average 1.3886370993849142) internal successors, (8579), 6178 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 8579 transitions. [2021-10-16 01:54:56,408 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 8579 transitions. Word has length 54 [2021-10-16 01:54:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:56,409 INFO L470 AbstractCegarLoop]: Abstraction has 6179 states and 8579 transitions. [2021-10-16 01:54:56,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 8579 transitions. [2021-10-16 01:54:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-16 01:54:56,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:56,420 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:56,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 01:54:56,420 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1406015679, now seen corresponding path program 1 times [2021-10-16 01:54:56,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:56,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433292280] [2021-10-16 01:54:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:56,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:56,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:56,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433292280] [2021-10-16 01:54:56,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433292280] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:56,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:56,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 01:54:56,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806830376] [2021-10-16 01:54:56,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:54:56,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:54:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:56,518 INFO L87 Difference]: Start difference. First operand 6179 states and 8579 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:56,997 INFO L93 Difference]: Finished difference Result 11913 states and 16277 transitions. [2021-10-16 01:54:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:54:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-10-16 01:54:56,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:57,017 INFO L225 Difference]: With dead ends: 11913 [2021-10-16 01:54:57,018 INFO L226 Difference]: Without dead ends: 9310 [2021-10-16 01:54:57,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:54:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2021-10-16 01:54:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 7707. [2021-10-16 01:54:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 1.3542694004671685) internal successors, (10436), 7706 states have internal predecessors, (10436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 10436 transitions. [2021-10-16 01:54:57,464 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 10436 transitions. Word has length 55 [2021-10-16 01:54:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:57,464 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 10436 transitions. [2021-10-16 01:54:57,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 10436 transitions. [2021-10-16 01:54:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-16 01:54:57,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:57,471 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:57,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 01:54:57,472 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:57,472 INFO L82 PathProgramCache]: Analyzing trace with hash 560491726, now seen corresponding path program 1 times [2021-10-16 01:54:57,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:57,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660410345] [2021-10-16 01:54:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:57,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:57,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:57,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660410345] [2021-10-16 01:54:57,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660410345] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:57,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:54:57,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:54:57,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201507246] [2021-10-16 01:54:57,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:54:57,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:54:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:57,510 INFO L87 Difference]: Start difference. First operand 7707 states and 10436 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:57,852 INFO L93 Difference]: Finished difference Result 14309 states and 19640 transitions. [2021-10-16 01:54:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:54:57,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-10-16 01:54:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:57,873 INFO L225 Difference]: With dead ends: 14309 [2021-10-16 01:54:57,873 INFO L226 Difference]: Without dead ends: 8935 [2021-10-16 01:54:57,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:54:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2021-10-16 01:54:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 8162. [2021-10-16 01:54:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8161 states have (on average 1.3635583874525181) internal successors, (11128), 8161 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 11128 transitions. [2021-10-16 01:54:58,280 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 11128 transitions. Word has length 56 [2021-10-16 01:54:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:54:58,280 INFO L470 AbstractCegarLoop]: Abstraction has 8162 states and 11128 transitions. [2021-10-16 01:54:58,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:58,281 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 11128 transitions. [2021-10-16 01:54:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-16 01:54:58,287 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:54:58,288 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:54:58,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 01:54:58,288 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:54:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:54:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1770572136, now seen corresponding path program 1 times [2021-10-16 01:54:58,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:54:58,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007157125] [2021-10-16 01:54:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:58,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:54:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 01:54:58,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:54:58,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007157125] [2021-10-16 01:54:58,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007157125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 01:54:58,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419199229] [2021-10-16 01:54:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:54:58,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:54:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:54:58,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:54:58,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 01:54:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:54:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 01:54:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:54:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:58,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:54:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:54:58,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419199229] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:54:58,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 01:54:58,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [4] total 7 [2021-10-16 01:54:58,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490329239] [2021-10-16 01:54:58,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 01:54:58,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:54:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 01:54:58,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-16 01:54:58,884 INFO L87 Difference]: Start difference. First operand 8162 states and 11128 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:54:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:54:59,707 INFO L93 Difference]: Finished difference Result 19949 states and 27238 transitions. [2021-10-16 01:54:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 01:54:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-16 01:54:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:54:59,739 INFO L225 Difference]: With dead ends: 19949 [2021-10-16 01:54:59,739 INFO L226 Difference]: Without dead ends: 11967 [2021-10-16 01:54:59,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-16 01:54:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11967 states. [2021-10-16 01:55:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11967 to 6801. [2021-10-16 01:55:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6801 states, 6800 states have (on average 1.3745588235294117) internal successors, (9347), 6800 states have internal predecessors, (9347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6801 states to 6801 states and 9347 transitions. [2021-10-16 01:55:00,195 INFO L78 Accepts]: Start accepts. Automaton has 6801 states and 9347 transitions. Word has length 58 [2021-10-16 01:55:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:00,195 INFO L470 AbstractCegarLoop]: Abstraction has 6801 states and 9347 transitions. [2021-10-16 01:55:00,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 6801 states and 9347 transitions. [2021-10-16 01:55:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-16 01:55:00,207 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:00,207 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:00,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:00,432 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2020330492, now seen corresponding path program 1 times [2021-10-16 01:55:00,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:00,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454821113] [2021-10-16 01:55:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:00,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:00,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:00,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454821113] [2021-10-16 01:55:00,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454821113] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:00,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:55:00,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:55:00,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588227044] [2021-10-16 01:55:00,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:55:00,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:00,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:55:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:00,489 INFO L87 Difference]: Start difference. First operand 6801 states and 9347 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:00,723 INFO L93 Difference]: Finished difference Result 11744 states and 16246 transitions. [2021-10-16 01:55:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:55:00,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-10-16 01:55:00,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:00,738 INFO L225 Difference]: With dead ends: 11744 [2021-10-16 01:55:00,738 INFO L226 Difference]: Without dead ends: 6845 [2021-10-16 01:55:00,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2021-10-16 01:55:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6777. [2021-10-16 01:55:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 6776 states have (on average 1.3342680047225501) internal successors, (9041), 6776 states have internal predecessors, (9041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 9041 transitions. [2021-10-16 01:55:01,043 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 9041 transitions. Word has length 72 [2021-10-16 01:55:01,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:01,043 INFO L470 AbstractCegarLoop]: Abstraction has 6777 states and 9041 transitions. [2021-10-16 01:55:01,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 9041 transitions. [2021-10-16 01:55:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-16 01:55:01,056 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:01,056 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:01,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-16 01:55:01,056 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1351056718, now seen corresponding path program 1 times [2021-10-16 01:55:01,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:01,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972860726] [2021-10-16 01:55:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:01,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 01:55:01,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:01,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972860726] [2021-10-16 01:55:01,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972860726] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:01,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:55:01,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 01:55:01,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853082015] [2021-10-16 01:55:01,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:55:01,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:01,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:55:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:55:01,107 INFO L87 Difference]: Start difference. First operand 6777 states and 9041 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:01,662 INFO L93 Difference]: Finished difference Result 16626 states and 22017 transitions. [2021-10-16 01:55:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 01:55:01,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-10-16 01:55:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:01,681 INFO L225 Difference]: With dead ends: 16626 [2021-10-16 01:55:01,681 INFO L226 Difference]: Without dead ends: 11423 [2021-10-16 01:55:01,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 01:55:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11423 states. [2021-10-16 01:55:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11423 to 9118. [2021-10-16 01:55:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9118 states, 9117 states have (on average 1.3133706263025118) internal successors, (11974), 9117 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9118 states to 9118 states and 11974 transitions. [2021-10-16 01:55:02,110 INFO L78 Accepts]: Start accepts. Automaton has 9118 states and 11974 transitions. Word has length 72 [2021-10-16 01:55:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:02,110 INFO L470 AbstractCegarLoop]: Abstraction has 9118 states and 11974 transitions. [2021-10-16 01:55:02,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 9118 states and 11974 transitions. [2021-10-16 01:55:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-16 01:55:02,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:02,124 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:02,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-16 01:55:02,124 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1659495727, now seen corresponding path program 1 times [2021-10-16 01:55:02,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:02,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794065167] [2021-10-16 01:55:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:02,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:02,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:02,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794065167] [2021-10-16 01:55:02,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794065167] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:02,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:55:02,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:55:02,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511193876] [2021-10-16 01:55:02,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:55:02,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:02,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:55:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:02,163 INFO L87 Difference]: Start difference. First operand 9118 states and 11974 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:02,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:02,450 INFO L93 Difference]: Finished difference Result 14023 states and 18587 transitions. [2021-10-16 01:55:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:55:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-10-16 01:55:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:02,458 INFO L225 Difference]: With dead ends: 14023 [2021-10-16 01:55:02,458 INFO L226 Difference]: Without dead ends: 5572 [2021-10-16 01:55:02,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5572 states. [2021-10-16 01:55:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5572 to 4816. [2021-10-16 01:55:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4816 states, 4815 states have (on average 1.2868120456905503) internal successors, (6196), 4815 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:02,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6196 transitions. [2021-10-16 01:55:02,715 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6196 transitions. Word has length 72 [2021-10-16 01:55:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:02,715 INFO L470 AbstractCegarLoop]: Abstraction has 4816 states and 6196 transitions. [2021-10-16 01:55:02,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6196 transitions. [2021-10-16 01:55:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-16 01:55:02,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:02,723 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:02,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-16 01:55:02,723 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:02,723 INFO L82 PathProgramCache]: Analyzing trace with hash 748008405, now seen corresponding path program 1 times [2021-10-16 01:55:02,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:02,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074885504] [2021-10-16 01:55:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:02,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 01:55:02,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:02,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074885504] [2021-10-16 01:55:02,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074885504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:02,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:55:02,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:55:02,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572373055] [2021-10-16 01:55:02,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:55:02,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:55:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:02,759 INFO L87 Difference]: Start difference. First operand 4816 states and 6196 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:02,976 INFO L93 Difference]: Finished difference Result 8480 states and 10896 transitions. [2021-10-16 01:55:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:55:02,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-10-16 01:55:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:02,982 INFO L225 Difference]: With dead ends: 8480 [2021-10-16 01:55:02,982 INFO L226 Difference]: Without dead ends: 5096 [2021-10-16 01:55:02,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2021-10-16 01:55:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 4672. [2021-10-16 01:55:03,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 1.2680368229501178) internal successors, (5923), 4671 states have internal predecessors, (5923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 5923 transitions. [2021-10-16 01:55:03,324 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 5923 transitions. Word has length 73 [2021-10-16 01:55:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:03,324 INFO L470 AbstractCegarLoop]: Abstraction has 4672 states and 5923 transitions. [2021-10-16 01:55:03,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 5923 transitions. [2021-10-16 01:55:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-16 01:55:03,333 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:03,333 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:03,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-16 01:55:03,334 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash 343149287, now seen corresponding path program 1 times [2021-10-16 01:55:03,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:03,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294473698] [2021-10-16 01:55:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:03,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 01:55:03,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:03,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294473698] [2021-10-16 01:55:03,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294473698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 01:55:03,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645822806] [2021-10-16 01:55:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:03,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:03,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:03,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:03,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 01:55:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:03,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 01:55:03,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:03,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:03,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645822806] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:03,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 01:55:03,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [4] total 10 [2021-10-16 01:55:03,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637947180] [2021-10-16 01:55:03,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 01:55:03,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 01:55:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-16 01:55:03,989 INFO L87 Difference]: Start difference. First operand 4672 states and 5923 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:04,600 INFO L93 Difference]: Finished difference Result 10023 states and 13004 transitions. [2021-10-16 01:55:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-16 01:55:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-10-16 01:55:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:04,610 INFO L225 Difference]: With dead ends: 10023 [2021-10-16 01:55:04,610 INFO L226 Difference]: Without dead ends: 6212 [2021-10-16 01:55:04,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-10-16 01:55:04,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2021-10-16 01:55:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 3359. [2021-10-16 01:55:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 1.2989874925550924) internal successors, (4362), 3358 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4362 transitions. [2021-10-16 01:55:04,826 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 4362 transitions. Word has length 73 [2021-10-16 01:55:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:04,827 INFO L470 AbstractCegarLoop]: Abstraction has 3359 states and 4362 transitions. [2021-10-16 01:55:04,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 4362 transitions. [2021-10-16 01:55:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-16 01:55:04,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:04,833 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:04,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-16 01:55:05,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-16 01:55:05,050 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:05,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1426202342, now seen corresponding path program 1 times [2021-10-16 01:55:05,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:05,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473609250] [2021-10-16 01:55:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:05,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:05,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:05,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473609250] [2021-10-16 01:55:05,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473609250] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:05,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:55:05,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 01:55:05,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865851045] [2021-10-16 01:55:05,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:55:05,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:55:05,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:55:05,139 INFO L87 Difference]: Start difference. First operand 3359 states and 4362 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:05,432 INFO L93 Difference]: Finished difference Result 6620 states and 8637 transitions. [2021-10-16 01:55:05,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:55:05,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-16 01:55:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:05,437 INFO L225 Difference]: With dead ends: 6620 [2021-10-16 01:55:05,437 INFO L226 Difference]: Without dead ends: 4179 [2021-10-16 01:55:05,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 01:55:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-10-16 01:55:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 3663. [2021-10-16 01:55:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 1.288367012561442) internal successors, (4718), 3662 states have internal predecessors, (4718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 4718 transitions. [2021-10-16 01:55:05,626 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 4718 transitions. Word has length 74 [2021-10-16 01:55:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:05,627 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 4718 transitions. [2021-10-16 01:55:05,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 4718 transitions. [2021-10-16 01:55:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-16 01:55:05,631 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:05,631 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:05,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-16 01:55:05,631 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:05,632 INFO L82 PathProgramCache]: Analyzing trace with hash -120801950, now seen corresponding path program 1 times [2021-10-16 01:55:05,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:05,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232073738] [2021-10-16 01:55:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:05,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 01:55:05,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:05,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232073738] [2021-10-16 01:55:05,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232073738] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:05,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:55:05,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 01:55:05,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229467004] [2021-10-16 01:55:05,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 01:55:05,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:05,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 01:55:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 01:55:05,692 INFO L87 Difference]: Start difference. First operand 3663 states and 4718 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:06,392 INFO L93 Difference]: Finished difference Result 11633 states and 14836 transitions. [2021-10-16 01:55:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 01:55:06,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-16 01:55:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:06,403 INFO L225 Difference]: With dead ends: 11633 [2021-10-16 01:55:06,403 INFO L226 Difference]: Without dead ends: 8293 [2021-10-16 01:55:06,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-16 01:55:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8293 states. [2021-10-16 01:55:06,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8293 to 4645. [2021-10-16 01:55:06,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4645 states, 4644 states have (on average 1.2790697674418605) internal successors, (5940), 4644 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4645 states to 4645 states and 5940 transitions. [2021-10-16 01:55:06,662 INFO L78 Accepts]: Start accepts. Automaton has 4645 states and 5940 transitions. Word has length 74 [2021-10-16 01:55:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:06,662 INFO L470 AbstractCegarLoop]: Abstraction has 4645 states and 5940 transitions. [2021-10-16 01:55:06,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4645 states and 5940 transitions. [2021-10-16 01:55:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-16 01:55:06,669 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:06,669 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:06,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-16 01:55:06,669 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2116561315, now seen corresponding path program 1 times [2021-10-16 01:55:06,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:06,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796143081] [2021-10-16 01:55:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:06,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:06,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:06,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796143081] [2021-10-16 01:55:06,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796143081] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:06,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:55:06,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:55:06,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996305502] [2021-10-16 01:55:06,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:55:06,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:06,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:55:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:06,708 INFO L87 Difference]: Start difference. First operand 4645 states and 5940 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:07,016 INFO L93 Difference]: Finished difference Result 9104 states and 11658 transitions. [2021-10-16 01:55:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:55:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-16 01:55:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:07,022 INFO L225 Difference]: With dead ends: 9104 [2021-10-16 01:55:07,022 INFO L226 Difference]: Without dead ends: 4641 [2021-10-16 01:55:07,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-10-16 01:55:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 4613. [2021-10-16 01:55:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 1.2202948829141371) internal successors, (5628), 4612 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 5628 transitions. [2021-10-16 01:55:07,320 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 5628 transitions. Word has length 74 [2021-10-16 01:55:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:07,321 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 5628 transitions. [2021-10-16 01:55:07,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:07,321 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 5628 transitions. [2021-10-16 01:55:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-16 01:55:07,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:07,327 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:07,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-16 01:55:07,328 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529861, now seen corresponding path program 1 times [2021-10-16 01:55:07,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:07,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259596297] [2021-10-16 01:55:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:07,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:07,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:07,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259596297] [2021-10-16 01:55:07,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259596297] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:07,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:55:07,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:55:07,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49838323] [2021-10-16 01:55:07,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:55:07,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:55:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:07,359 INFO L87 Difference]: Start difference. First operand 4613 states and 5628 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:07,671 INFO L93 Difference]: Finished difference Result 9028 states and 11144 transitions. [2021-10-16 01:55:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:55:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-16 01:55:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:07,677 INFO L225 Difference]: With dead ends: 9028 [2021-10-16 01:55:07,678 INFO L226 Difference]: Without dead ends: 4601 [2021-10-16 01:55:07,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-10-16 01:55:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4273. [2021-10-16 01:55:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 1.2425093632958801) internal successors, (5308), 4272 states have internal predecessors, (5308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 5308 transitions. [2021-10-16 01:55:07,866 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 5308 transitions. Word has length 75 [2021-10-16 01:55:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:07,866 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 5308 transitions. [2021-10-16 01:55:07,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 5308 transitions. [2021-10-16 01:55:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-16 01:55:07,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:07,872 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:07,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-16 01:55:07,872 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2109087771, now seen corresponding path program 1 times [2021-10-16 01:55:07,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:07,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636281110] [2021-10-16 01:55:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:07,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:07,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:07,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636281110] [2021-10-16 01:55:07,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636281110] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:07,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 01:55:07,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 01:55:07,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394170920] [2021-10-16 01:55:07,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 01:55:07,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 01:55:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:07,915 INFO L87 Difference]: Start difference. First operand 4273 states and 5308 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:08,182 INFO L93 Difference]: Finished difference Result 7236 states and 9062 transitions. [2021-10-16 01:55:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 01:55:08,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-16 01:55:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:08,186 INFO L225 Difference]: With dead ends: 7236 [2021-10-16 01:55:08,187 INFO L226 Difference]: Without dead ends: 3291 [2021-10-16 01:55:08,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 01:55:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-10-16 01:55:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3291. [2021-10-16 01:55:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3290 states have (on average 1.2264437689969605) internal successors, (4035), 3290 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 4035 transitions. [2021-10-16 01:55:08,411 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 4035 transitions. Word has length 75 [2021-10-16 01:55:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:08,411 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 4035 transitions. [2021-10-16 01:55:08,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 4035 transitions. [2021-10-16 01:55:08,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-16 01:55:08,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:08,415 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:08,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-16 01:55:08,415 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:08,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:08,415 INFO L82 PathProgramCache]: Analyzing trace with hash 228133449, now seen corresponding path program 1 times [2021-10-16 01:55:08,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:08,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855157361] [2021-10-16 01:55:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:08,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:08,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:08,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855157361] [2021-10-16 01:55:08,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855157361] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 01:55:08,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340445677] [2021-10-16 01:55:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:08,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:08,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:08,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 01:55:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 01:55:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:08,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:09,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340445677] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:09,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 01:55:09,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 4] imperfect sequences [4] total 12 [2021-10-16 01:55:09,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477228070] [2021-10-16 01:55:09,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 01:55:09,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:09,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 01:55:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-16 01:55:09,138 INFO L87 Difference]: Start difference. First operand 3291 states and 4035 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:09,855 INFO L93 Difference]: Finished difference Result 7372 states and 9115 transitions. [2021-10-16 01:55:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 01:55:09,855 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-16 01:55:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:09,859 INFO L225 Difference]: With dead ends: 7372 [2021-10-16 01:55:09,859 INFO L226 Difference]: Without dead ends: 4409 [2021-10-16 01:55:09,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-10-16 01:55:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-10-16 01:55:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 2542. [2021-10-16 01:55:10,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2541 states have (on average 1.2239275875639513) internal successors, (3110), 2541 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 3110 transitions. [2021-10-16 01:55:10,009 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 3110 transitions. Word has length 75 [2021-10-16 01:55:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:10,010 INFO L470 AbstractCegarLoop]: Abstraction has 2542 states and 3110 transitions. [2021-10-16 01:55:10,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 3110 transitions. [2021-10-16 01:55:10,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-16 01:55:10,013 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:10,013 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:10,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:10,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-16 01:55:10,234 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:10,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:10,236 INFO L82 PathProgramCache]: Analyzing trace with hash 260632163, now seen corresponding path program 1 times [2021-10-16 01:55:10,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:10,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380666669] [2021-10-16 01:55:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:10,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:10,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:10,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380666669] [2021-10-16 01:55:10,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380666669] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 01:55:10,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243123366] [2021-10-16 01:55:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:10,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:10,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:10,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:10,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 01:55:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:10,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 01:55:10,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 01:55:10,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 01:55:10,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243123366] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:10,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 01:55:10,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2021-10-16 01:55:10,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579649198] [2021-10-16 01:55:10,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 01:55:10,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:10,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 01:55:10,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-16 01:55:10,905 INFO L87 Difference]: Start difference. First operand 2542 states and 3110 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:11,393 INFO L93 Difference]: Finished difference Result 5303 states and 6488 transitions. [2021-10-16 01:55:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 01:55:11,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-16 01:55:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:11,398 INFO L225 Difference]: With dead ends: 5303 [2021-10-16 01:55:11,398 INFO L226 Difference]: Without dead ends: 3281 [2021-10-16 01:55:11,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-16 01:55:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2021-10-16 01:55:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 2126. [2021-10-16 01:55:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 1.2004705882352942) internal successors, (2551), 2125 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 2551 transitions. [2021-10-16 01:55:11,596 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 2551 transitions. Word has length 76 [2021-10-16 01:55:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:11,596 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 2551 transitions. [2021-10-16 01:55:11,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 2551 transitions. [2021-10-16 01:55:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-16 01:55:11,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:11,600 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:11,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:11,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:11,806 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:11,808 INFO L82 PathProgramCache]: Analyzing trace with hash 762478353, now seen corresponding path program 1 times [2021-10-16 01:55:11,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:11,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808450925] [2021-10-16 01:55:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:11,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:11,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:11,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808450925] [2021-10-16 01:55:11,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808450925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 01:55:11,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10099251] [2021-10-16 01:55:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:11,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:11,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:11,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 01:55:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:12,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 01:55:12,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:12,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:12,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10099251] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 01:55:12,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-16 01:55:12,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 6] total 11 [2021-10-16 01:55:12,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051794621] [2021-10-16 01:55:12,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 01:55:12,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 01:55:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-16 01:55:12,973 INFO L87 Difference]: Start difference. First operand 2126 states and 2551 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:13,344 INFO L93 Difference]: Finished difference Result 4897 states and 5939 transitions. [2021-10-16 01:55:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 01:55:13,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-16 01:55:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:13,348 INFO L225 Difference]: With dead ends: 4897 [2021-10-16 01:55:13,349 INFO L226 Difference]: Without dead ends: 3206 [2021-10-16 01:55:13,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-16 01:55:13,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-10-16 01:55:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3202. [2021-10-16 01:55:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 1.2068103717588254) internal successors, (3863), 3201 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 3863 transitions. [2021-10-16 01:55:13,601 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 3863 transitions. Word has length 77 [2021-10-16 01:55:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:13,601 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 3863 transitions. [2021-10-16 01:55:13,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 3863 transitions. [2021-10-16 01:55:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-16 01:55:13,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:13,604 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:13,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-16 01:55:13,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-16 01:55:13,809 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:13,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1858291132, now seen corresponding path program 1 times [2021-10-16 01:55:13,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:13,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108215228] [2021-10-16 01:55:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:13,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:13,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:13,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108215228] [2021-10-16 01:55:13,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108215228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 01:55:13,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245822149] [2021-10-16 01:55:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:13,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:13,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:13,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:13,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 01:55:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:14,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 01:55:14,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 01:55:14,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 01:55:15,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245822149] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:15,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 01:55:15,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [4] total 8 [2021-10-16 01:55:15,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075328077] [2021-10-16 01:55:15,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 01:55:15,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:15,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 01:55:15,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-16 01:55:15,277 INFO L87 Difference]: Start difference. First operand 3202 states and 3863 transitions. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:15,714 INFO L93 Difference]: Finished difference Result 5159 states and 6246 transitions. [2021-10-16 01:55:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 01:55:15,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-16 01:55:15,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:15,718 INFO L225 Difference]: With dead ends: 5159 [2021-10-16 01:55:15,718 INFO L226 Difference]: Without dead ends: 2444 [2021-10-16 01:55:15,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-16 01:55:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-10-16 01:55:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2122. [2021-10-16 01:55:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 1.1966053748231966) internal successors, (2538), 2121 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2538 transitions. [2021-10-16 01:55:15,931 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2538 transitions. Word has length 77 [2021-10-16 01:55:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:15,931 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 2538 transitions. [2021-10-16 01:55:15,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2538 transitions. [2021-10-16 01:55:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-16 01:55:15,933 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:15,933 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:15,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:16,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-16 01:55:16,135 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:16,137 INFO L82 PathProgramCache]: Analyzing trace with hash -671934434, now seen corresponding path program 1 times [2021-10-16 01:55:16,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:16,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022626925] [2021-10-16 01:55:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:16,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 01:55:16,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 01:55:16,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022626925] [2021-10-16 01:55:16,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022626925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 01:55:16,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815170895] [2021-10-16 01:55:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:16,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:16,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 01:55:16,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 01:55:16,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 01:55:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 01:55:16,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 01:55:16,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 01:55:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 01:55:17,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 01:55:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 01:55:17,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815170895] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 01:55:17,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 01:55:17,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [4] total 8 [2021-10-16 01:55:17,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960301878] [2021-10-16 01:55:17,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 01:55:17,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 01:55:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 01:55:17,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-16 01:55:17,687 INFO L87 Difference]: Start difference. First operand 2122 states and 2538 transitions. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 01:55:17,973 INFO L93 Difference]: Finished difference Result 3320 states and 4018 transitions. [2021-10-16 01:55:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 01:55:17,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-10-16 01:55:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 01:55:17,976 INFO L225 Difference]: With dead ends: 3320 [2021-10-16 01:55:17,977 INFO L226 Difference]: Without dead ends: 2783 [2021-10-16 01:55:17,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-16 01:55:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-10-16 01:55:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2122. [2021-10-16 01:55:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 1.1937765205091937) internal successors, (2532), 2121 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2532 transitions. [2021-10-16 01:55:18,135 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2532 transitions. Word has length 77 [2021-10-16 01:55:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 01:55:18,135 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 2532 transitions. [2021-10-16 01:55:18,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 01:55:18,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2532 transitions. [2021-10-16 01:55:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-16 01:55:18,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 01:55:18,137 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 01:55:18,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 01:55:18,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 01:55:18,354 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 01:55:18,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 01:55:18,356 INFO L82 PathProgramCache]: Analyzing trace with hash 247564691, now seen corresponding path program 1 times [2021-10-16 01:55:18,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 01:55:18,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605111069] [2021-10-16 01:55:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 01:55:18,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 01:55:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 01:55:18,416 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 01:55:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 01:55:18,555 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 01:55:18,555 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 01:55:18,556 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 01:55:18,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-16 01:55:18,564 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 01:55:18,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 01:55:18 BoogieIcfgContainer [2021-10-16 01:55:18,702 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 01:55:18,703 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 01:55:18,703 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 01:55:18,703 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 01:55:18,704 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:54:51" (3/4) ... [2021-10-16 01:55:18,706 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 01:55:18,837 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 01:55:18,837 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 01:55:18,839 INFO L168 Benchmark]: Toolchain (without parser) took 29769.86 ms. Allocated memory was 109.1 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 75.6 MB in the beginning and 2.1 GB in the end (delta: -2.0 GB). Peak memory consumption was 107.5 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:18,840 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 73.4 MB. Free memory was 47.8 MB in the beginning and 47.8 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 01:55:18,840 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.20 ms. Allocated memory is still 109.1 MB. Free memory was 75.6 MB in the beginning and 83.5 MB in the end (delta: -7.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:18,842 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.36 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 79.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:18,842 INFO L168 Benchmark]: Boogie Preprocessor took 70.40 ms. Allocated memory is still 109.1 MB. Free memory was 79.9 MB in the beginning and 77.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:18,843 INFO L168 Benchmark]: RCFGBuilder took 1766.54 ms. Allocated memory is still 109.1 MB. Free memory was 76.7 MB in the beginning and 70.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:18,843 INFO L168 Benchmark]: TraceAbstraction took 27351.35 ms. Allocated memory was 109.1 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 69.7 MB in the beginning and 2.1 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.1 GB. [2021-10-16 01:55:18,844 INFO L168 Benchmark]: Witness Printer took 134.65 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-16 01:55:18,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 73.4 MB. Free memory was 47.8 MB in the beginning and 47.8 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 358.20 ms. Allocated memory is still 109.1 MB. Free memory was 75.6 MB in the beginning and 83.5 MB in the end (delta: -7.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.36 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 79.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.40 ms. Allocated memory is still 109.1 MB. Free memory was 79.9 MB in the beginning and 77.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1766.54 ms. Allocated memory is still 109.1 MB. Free memory was 76.7 MB in the beginning and 70.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 27351.35 ms. Allocated memory was 109.1 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 69.7 MB in the beginning and 2.1 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.1 GB. * Witness Printer took 134.65 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int m_pc = 0; [L18] int t1_pc = 0; [L19] int t2_pc = 0; [L20] int t3_pc = 0; [L21] int m_st ; [L22] int t1_st ; [L23] int t2_st ; [L24] int t3_st ; [L25] int m_i ; [L26] int t1_i ; [L27] int t2_i ; [L28] int t3_i ; [L29] int M_E = 2; [L30] int T1_E = 2; [L31] int T2_E = 2; [L32] int T3_E = 2; [L33] int E_1 = 2; [L34] int E_2 = 2; [L35] int E_3 = 2; [L689] int __retres1 ; [L602] m_i = 1 [L603] t1_i = 1 [L604] t2_i = 1 [L605] t3_i = 1 [L630] int kernel_st ; [L631] int tmp ; [L632] int tmp___0 ; [L636] kernel_st = 0 [L273] COND TRUE m_i == 1 [L274] m_st = 0 [L278] COND TRUE t1_i == 1 [L279] t1_st = 0 [L283] COND TRUE t2_i == 1 [L284] t2_st = 0 [L288] COND TRUE t3_i == 1 [L289] t3_st = 0 [L410] COND FALSE !(M_E == 0) [L415] COND FALSE !(T1_E == 0) [L420] COND FALSE !(T2_E == 0) [L425] COND FALSE !(T3_E == 0) [L430] COND FALSE !(E_1 == 0) [L435] COND FALSE !(E_2 == 0) [L440] COND FALSE !(E_3 == 0) [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L189] COND FALSE !(m_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L208] COND FALSE !(t1_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND FALSE !(\read(tmp___0)) [L224] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L227] COND FALSE !(t2_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L237] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND FALSE !(\read(tmp___1)) [L243] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L246] COND FALSE !(t3_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L256] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND FALSE !(\read(tmp___2)) [L453] COND FALSE !(M_E == 1) [L458] COND FALSE !(T1_E == 1) [L463] COND FALSE !(T2_E == 1) [L468] COND FALSE !(T3_E == 1) [L473] COND FALSE !(E_1 == 1) [L478] COND FALSE !(E_2 == 1) [L483] COND FALSE !(E_3 == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L644] COND TRUE 1 [L647] kernel_st = 1 [L329] int tmp ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L333] COND TRUE 1 [L298] int __retres1 ; [L301] COND TRUE m_st == 0 [L302] __retres1 = 1 [L324] return (__retres1); [L336] tmp = exists_runnable_thread() [L338] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L343] COND TRUE m_st == 0 [L344] int tmp_ndt_1; [L345] tmp_ndt_1 = __VERIFIER_nondet_int() [L346] COND FALSE !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L357] COND TRUE t1_st == 0 [L358] int tmp_ndt_2; [L359] tmp_ndt_2 = __VERIFIER_nondet_int() [L360] COND TRUE \read(tmp_ndt_2) [L362] t1_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L86] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L97] COND TRUE 1 [L99] t1_pc = 1 [L100] t1_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L371] COND TRUE t2_st == 0 [L372] int tmp_ndt_3; [L373] tmp_ndt_3 = __VERIFIER_nondet_int() [L374] COND TRUE \read(tmp_ndt_3) [L376] t2_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L121] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L132] COND TRUE 1 [L134] t2_pc = 1 [L135] t2_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L385] COND TRUE t3_st == 0 [L386] int tmp_ndt_4; [L387] tmp_ndt_4 = __VERIFIER_nondet_int() [L388] COND TRUE \read(tmp_ndt_4) [L390] t3_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=1] [L156] COND TRUE t3_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=1] [L167] COND TRUE 1 [L169] t3_pc = 1 [L170] t3_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L333] COND TRUE 1 [L298] int __retres1 ; [L301] COND TRUE m_st == 0 [L302] __retres1 = 1 [L324] return (__retres1); [L336] tmp = exists_runnable_thread() [L338] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L343] COND TRUE m_st == 0 [L344] int tmp_ndt_1; [L345] tmp_ndt_1 = __VERIFIER_nondet_int() [L346] COND TRUE \read(tmp_ndt_1) [L348] m_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L45] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L56] COND TRUE 1 [L59] E_1 = 1 [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L189] COND FALSE !(m_pc == 1) VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L199] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L208] COND TRUE t1_pc == 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L209] COND TRUE E_1 == 1 [L210] __retres1 = 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND TRUE \read(tmp___0) [L511] t1_st = 0 [L224] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L227] COND TRUE t2_pc == 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L228] COND FALSE !(E_2 == 1) VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L237] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND FALSE !(\read(tmp___1)) [L243] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L246] COND TRUE t3_pc == 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L247] COND FALSE !(E_3 == 1) VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L256] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND FALSE !(\read(tmp___2)) [L61] E_1 = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L64] COND TRUE 1 [L66] m_pc = 1 [L67] m_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L357] COND TRUE t1_st == 0 [L358] int tmp_ndt_2; [L359] tmp_ndt_2 = __VERIFIER_nondet_int() [L360] COND TRUE \read(tmp_ndt_2) [L362] t1_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L86] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L89] COND TRUE t1_pc == 1 [L105] E_2 = 1 [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L189] COND TRUE m_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L190] COND FALSE !(M_E == 1) VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L199] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L208] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L209] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L218] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND FALSE !(\read(tmp___0)) [L224] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L227] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L228] COND TRUE E_2 == 1 [L229] __retres1 = 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND TRUE \read(tmp___1) [L519] t2_st = 0 [L243] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L246] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L247] COND FALSE !(E_3 == 1) VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L256] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND FALSE !(\read(tmp___2)) [L107] E_2 = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L97] COND TRUE 1 [L99] t1_pc = 1 [L100] t1_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L371] COND TRUE t2_st == 0 [L372] int tmp_ndt_3; [L373] tmp_ndt_3 = __VERIFIER_nondet_int() [L374] COND TRUE \read(tmp_ndt_3) [L376] t2_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L121] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L124] COND TRUE t2_pc == 1 [L140] E_3 = 1 [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L189] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L190] COND FALSE !(M_E == 1) VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L208] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L209] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND FALSE !(\read(tmp___0)) [L224] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L227] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L228] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L237] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND FALSE !(\read(tmp___1)) [L243] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L246] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L247] COND TRUE E_3 == 1 [L248] __retres1 = 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND TRUE \read(tmp___2) [L527] t3_st = 0 [L142] E_3 = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=0] [L132] COND TRUE 1 [L134] t2_pc = 1 [L135] t2_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=0] [L385] COND TRUE t3_st == 0 [L386] int tmp_ndt_4; [L387] tmp_ndt_4 = __VERIFIER_nondet_int() [L388] COND TRUE \read(tmp_ndt_4) [L390] t3_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] [L156] COND FALSE !(t3_pc == 0) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] [L159] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] [L13] reach_error() VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 129 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 27147.0ms, OverallIterations: 29, TraceHistogramMax: 3, EmptinessCheckTime: 160.9ms, AutomataDifference: 10255.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6217 SDtfs, 7792 SDslu, 7837 SDs, 0 SdLazy, 1353 SolverSat, 362 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1209.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1195 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 670.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9118occurred in iteration=15, InterpolantAutomatonStates: 147, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6584.0ms AutomataMinimizationTime, 28 MinimizatonAttempts, 24466 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 288.6ms SsaConstructionTime, 831.2ms SatisfiabilityAnalysisTime, 5501.7ms InterpolantComputationTime, 2302 NumberOfCodeBlocks, 2302 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2677 ConstructedInterpolants, 0 QuantifiedInterpolants, 7718 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2457 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 42 InterpolantComputations, 34 PerfectInterpolantSequences, 531/545 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 01:55:18,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bae0fbfc-bfce-4261-a162-16fa64cf2c14/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...