./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f6e67caa8159a722902bebe9d23adade07462f3fac0eb20b485945b97ba6592 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 18:45:07,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 18:45:07,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 18:45:07,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 18:45:07,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 18:45:07,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 18:45:07,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 18:45:07,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 18:45:07,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 18:45:07,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 18:45:07,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 18:45:07,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 18:45:07,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 18:45:07,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 18:45:07,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 18:45:07,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 18:45:07,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 18:45:07,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 18:45:07,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 18:45:07,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 18:45:07,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 18:45:07,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 18:45:07,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 18:45:07,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 18:45:07,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 18:45:07,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 18:45:07,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 18:45:07,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 18:45:07,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 18:45:07,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 18:45:07,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 18:45:07,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 18:45:07,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 18:45:07,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 18:45:07,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 18:45:07,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 18:45:07,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 18:45:07,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 18:45:07,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 18:45:07,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 18:45:07,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 18:45:07,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 18:45:07,498 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 18:45:07,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 18:45:07,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 18:45:07,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 18:45:07,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 18:45:07,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 18:45:07,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 18:45:07,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 18:45:07,502 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 18:45:07,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 18:45:07,503 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 18:45:07,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 18:45:07,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 18:45:07,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 18:45:07,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 18:45:07,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 18:45:07,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 18:45:07,504 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 18:45:07,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 18:45:07,504 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 18:45:07,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 18:45:07,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 18:45:07,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 18:45:07,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 18:45:07,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:45:07,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 18:45:07,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 18:45:07,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 18:45:07,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 18:45:07,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 18:45:07,506 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 18:45:07,507 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 18:45:07,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 18:45:07,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 18:45:07,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f6e67caa8159a722902bebe9d23adade07462f3fac0eb20b485945b97ba6592 [2021-12-17 18:45:07,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 18:45:07,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 18:45:07,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 18:45:07,767 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 18:45:07,767 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 18:45:07,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c [2021-12-17 18:45:07,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a690306/99987b4dd4844de8bde1e39198033a78/FLAGe21f72c3f [2021-12-17 18:45:08,643 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 18:45:08,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c [2021-12-17 18:45:08,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a690306/99987b4dd4844de8bde1e39198033a78/FLAGe21f72c3f [2021-12-17 18:45:08,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a690306/99987b4dd4844de8bde1e39198033a78 [2021-12-17 18:45:08,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 18:45:08,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 18:45:08,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 18:45:08,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 18:45:08,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 18:45:08,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:45:08" (1/1) ... [2021-12-17 18:45:08,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677c65ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:08, skipping insertion in model container [2021-12-17 18:45:08,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:45:08" (1/1) ... [2021-12-17 18:45:08,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 18:45:09,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 18:45:10,448 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c[377069,377082] [2021-12-17 18:45:10,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c[383339,383352] [2021-12-17 18:45:10,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:45:10,632 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 18:45:11,348 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c[377069,377082] [2021-12-17 18:45:11,355 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.03.cil-2.c[383339,383352] [2021-12-17 18:45:11,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:45:11,414 INFO L208 MainTranslator]: Completed translation [2021-12-17 18:45:11,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11 WrapperNode [2021-12-17 18:45:11,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 18:45:11,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 18:45:11,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 18:45:11,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 18:45:11,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:11,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:11,809 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-12-17 18:45:11,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 18:45:11,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 18:45:11,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 18:45:11,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 18:45:11,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:11,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:11,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:11,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:12,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:12,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:12,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:12,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 18:45:12,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 18:45:12,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 18:45:12,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 18:45:12,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (1/1) ... [2021-12-17 18:45:12,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:45:12,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:12,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 18:45:12,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 18:45:12,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 18:45:12,417 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 18:45:12,417 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 18:45:12,417 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 18:45:12,417 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 18:45:12,418 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 18:45:12,418 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 18:45:12,418 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 18:45:12,418 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 18:45:12,418 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 18:45:12,418 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 18:45:12,418 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 18:45:12,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 18:45:12,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 18:45:12,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 18:45:12,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 18:45:12,554 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 18:45:12,568 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 18:45:18,122 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 18:45:18,151 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 18:45:18,151 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-17 18:45:18,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:45:18 BoogieIcfgContainer [2021-12-17 18:45:18,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 18:45:18,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 18:45:18,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 18:45:18,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 18:45:18,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 06:45:08" (1/3) ... [2021-12-17 18:45:18,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2dcfb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:45:18, skipping insertion in model container [2021-12-17 18:45:18,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:11" (2/3) ... [2021-12-17 18:45:18,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2dcfb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:45:18, skipping insertion in model container [2021-12-17 18:45:18,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:45:18" (3/3) ... [2021-12-17 18:45:18,163 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.03.cil-2.c [2021-12-17 18:45:18,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 18:45:18,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 18:45:18,212 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 18:45:18,218 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-17 18:45:18,218 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 18:45:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 18:45:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:45:18,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:18,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:18,277 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:18,281 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-12-17 18:45:18,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:18,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810634378] [2021-12-17 18:45:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:18,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:18,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:18,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:18,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:18,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:18,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:45:18,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:18,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810634378] [2021-12-17 18:45:18,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810634378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:18,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:18,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:45:18,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830461894] [2021-12-17 18:45:18,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:18,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:45:18,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:18,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:45:18,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:45:18,644 INFO L87 Difference]: Start difference. First operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:19,820 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-12-17 18:45:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:45:19,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:45:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:19,846 INFO L225 Difference]: With dead ends: 4899 [2021-12-17 18:45:19,846 INFO L226 Difference]: Without dead ends: 2500 [2021-12-17 18:45:19,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:45:19,856 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:19,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:45:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-17 18:45:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-12-17 18:45:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8291859974694222) internal successors, (4337), 2374 states have internal predecessors, (4337), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-17 18:45:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-12-17 18:45:19,967 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-12-17 18:45:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:19,967 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-12-17 18:45:19,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-12-17 18:45:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:45:19,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:19,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:19,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 18:45:19,980 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:19,982 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-12-17 18:45:19,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:19,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795790586] [2021-12-17 18:45:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:19,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:20,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:20,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:20,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:20,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:20,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:45:20,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:20,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795790586] [2021-12-17 18:45:20,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795790586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:20,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:20,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:45:20,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496933788] [2021-12-17 18:45:20,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:20,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:45:20,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:45:20,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:45:20,124 INFO L87 Difference]: Start difference. First operand 2415 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:21,173 INFO L93 Difference]: Finished difference Result 2969 states and 5244 transitions. [2021-12-17 18:45:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:45:21,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:45:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:21,189 INFO L225 Difference]: With dead ends: 2969 [2021-12-17 18:45:21,189 INFO L226 Difference]: Without dead ends: 2686 [2021-12-17 18:45:21,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:45:21,197 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 4469 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20915 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:21,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20915 Invalid, 1107 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:45:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-12-17 18:45:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2548. [2021-12-17 18:45:21,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2485 states have (on average 1.8132796780684104) internal successors, (4506), 2489 states have internal predecessors, (4506), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-17 18:45:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4593 transitions. [2021-12-17 18:45:21,272 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4593 transitions. Word has length 79 [2021-12-17 18:45:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:21,272 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4593 transitions. [2021-12-17 18:45:21,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4593 transitions. [2021-12-17 18:45:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:45:21,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:21,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:21,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 18:45:21,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:21,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-12-17 18:45:21,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:21,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143694918] [2021-12-17 18:45:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:21,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:21,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:21,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:21,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:21,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:45:21,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:21,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143694918] [2021-12-17 18:45:21,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143694918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:21,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:21,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:45:21,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045621454] [2021-12-17 18:45:21,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:21,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:45:21,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:45:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:45:21,378 INFO L87 Difference]: Start difference. First operand 2548 states and 4593 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:22,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:22,448 INFO L93 Difference]: Finished difference Result 3451 states and 5967 transitions. [2021-12-17 18:45:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:45:22,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:45:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:22,463 INFO L225 Difference]: With dead ends: 3451 [2021-12-17 18:45:22,463 INFO L226 Difference]: Without dead ends: 3035 [2021-12-17 18:45:22,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:45:22,467 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4466 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 20903 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:22,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 20903 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:45:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-12-17 18:45:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2815. [2021-12-17 18:45:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2714 states have (on average 1.7851879145173175) internal successors, (4845), 2720 states have internal predecessors, (4845), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-17 18:45:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 4988 transitions. [2021-12-17 18:45:22,616 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 4988 transitions. Word has length 79 [2021-12-17 18:45:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:22,618 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 4988 transitions. [2021-12-17 18:45:22,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 4988 transitions. [2021-12-17 18:45:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:45:22,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:22,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:22,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 18:45:22,622 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:22,622 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-12-17 18:45:22,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:22,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991802399] [2021-12-17 18:45:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:22,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:45:22,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:22,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991802399] [2021-12-17 18:45:22,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991802399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:22,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:22,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:45:22,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069074093] [2021-12-17 18:45:22,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:22,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:45:22,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:45:22,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:45:22,730 INFO L87 Difference]: Start difference. First operand 2815 states and 4988 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:23,729 INFO L93 Difference]: Finished difference Result 4382 states and 7362 transitions. [2021-12-17 18:45:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:45:23,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:45:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:23,748 INFO L225 Difference]: With dead ends: 4382 [2021-12-17 18:45:23,749 INFO L226 Difference]: Without dead ends: 3699 [2021-12-17 18:45:23,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:45:23,763 INFO L933 BasicCegarLoop]: 4308 mSDtfsCounter, 4462 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 20899 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:23,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4472 Valid, 20899 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:45:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-12-17 18:45:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3350. [2021-12-17 18:45:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7406240151276395) internal successors, (5523), 3183 states have internal predecessors, (5523), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 18:45:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5784 transitions. [2021-12-17 18:45:23,880 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5784 transitions. Word has length 79 [2021-12-17 18:45:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:23,880 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5784 transitions. [2021-12-17 18:45:23,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5784 transitions. [2021-12-17 18:45:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:45:23,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:23,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:23,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 18:45:23,883 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:23,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:23,883 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-12-17 18:45:23,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:23,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113536439] [2021-12-17 18:45:23,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:23,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:23,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:23,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:23,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:23,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:23,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:45:23,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:23,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113536439] [2021-12-17 18:45:23,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113536439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:23,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:23,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:45:23,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317616332] [2021-12-17 18:45:23,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:23,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:45:23,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:45:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:45:23,971 INFO L87 Difference]: Start difference. First operand 3350 states and 5784 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:24,478 INFO L93 Difference]: Finished difference Result 4914 states and 8177 transitions. [2021-12-17 18:45:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:45:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:45:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:24,493 INFO L225 Difference]: With dead ends: 4914 [2021-12-17 18:45:24,494 INFO L226 Difference]: Without dead ends: 3696 [2021-12-17 18:45:24,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:45:24,499 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4396 mSDsluCounter, 12153 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4407 SdHoareTripleChecker+Valid, 16322 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:24,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4407 Valid, 16322 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 18:45:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-12-17 18:45:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3350. [2021-12-17 18:45:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7377875827292784) internal successors, (5514), 3183 states have internal predecessors, (5514), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 18:45:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5775 transitions. [2021-12-17 18:45:24,598 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5775 transitions. Word has length 79 [2021-12-17 18:45:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:24,598 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5775 transitions. [2021-12-17 18:45:24,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5775 transitions. [2021-12-17 18:45:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:45:24,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:24,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:24,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 18:45:24,601 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-12-17 18:45:24,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281258290] [2021-12-17 18:45:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:24,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:24,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:24,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:24,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:24,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:24,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:45:24,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281258290] [2021-12-17 18:45:24,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281258290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:24,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:24,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:45:24,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36468683] [2021-12-17 18:45:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:24,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:45:24,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:45:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:45:24,684 INFO L87 Difference]: Start difference. First operand 3350 states and 5775 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:25,866 INFO L93 Difference]: Finished difference Result 6544 states and 10562 transitions. [2021-12-17 18:45:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:45:25,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:45:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:25,888 INFO L225 Difference]: With dead ends: 6544 [2021-12-17 18:45:25,888 INFO L226 Difference]: Without dead ends: 5326 [2021-12-17 18:45:25,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 18:45:25,894 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 4475 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4484 SdHoareTripleChecker+Valid, 20917 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:25,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4484 Valid, 20917 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:45:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-12-17 18:45:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4369. [2021-12-17 18:45:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4048 states have (on average 1.679100790513834) internal successors, (6797), 4066 states have internal predecessors, (6797), 201 states have call successors, (201), 102 states have call predecessors, (201), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2021-12-17 18:45:26,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 7296 transitions. [2021-12-17 18:45:26,041 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 7296 transitions. Word has length 79 [2021-12-17 18:45:26,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:26,042 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 7296 transitions. [2021-12-17 18:45:26,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:26,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 7296 transitions. [2021-12-17 18:45:26,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:45:26,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:26,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:26,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 18:45:26,045 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:26,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-12-17 18:45:26,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:26,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241444239] [2021-12-17 18:45:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:26,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:26,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:26,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:26,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:26,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:26,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:45:26,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:26,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241444239] [2021-12-17 18:45:26,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241444239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:26,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:26,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:45:26,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484390228] [2021-12-17 18:45:26,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:26,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:45:26,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:45:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:45:26,145 INFO L87 Difference]: Start difference. First operand 4369 states and 7296 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:27,188 INFO L93 Difference]: Finished difference Result 9937 states and 15669 transitions. [2021-12-17 18:45:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:45:27,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:45:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:27,257 INFO L225 Difference]: With dead ends: 9937 [2021-12-17 18:45:27,258 INFO L226 Difference]: Without dead ends: 7700 [2021-12-17 18:45:27,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 18:45:27,269 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4466 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4480 SdHoareTripleChecker+Valid, 20870 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:27,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4480 Valid, 20870 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:45:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7700 states. [2021-12-17 18:45:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7700 to 6452. [2021-12-17 18:45:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 5851 states have (on average 1.6169885489659888) internal successors, (9461), 5885 states have internal predecessors, (9461), 369 states have call successors, (369), 198 states have call predecessors, (369), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2021-12-17 18:45:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 10474 transitions. [2021-12-17 18:45:27,526 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 10474 transitions. Word has length 79 [2021-12-17 18:45:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:27,528 INFO L470 AbstractCegarLoop]: Abstraction has 6452 states and 10474 transitions. [2021-12-17 18:45:27,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 10474 transitions. [2021-12-17 18:45:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:45:27,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:27,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:27,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 18:45:27,534 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-12-17 18:45:27,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:27,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834296210] [2021-12-17 18:45:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:27,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:27,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:27,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:27,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:27,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:27,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:45:27,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834296210] [2021-12-17 18:45:27,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834296210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:27,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:45:27,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:45:27,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891692200] [2021-12-17 18:45:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:27,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:45:27,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:45:27,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:45:27,613 INFO L87 Difference]: Start difference. First operand 6452 states and 10474 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:28,708 INFO L93 Difference]: Finished difference Result 14451 states and 22576 transitions. [2021-12-17 18:45:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:45:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:45:28,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:28,746 INFO L225 Difference]: With dead ends: 14451 [2021-12-17 18:45:28,746 INFO L226 Difference]: Without dead ends: 10132 [2021-12-17 18:45:28,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 18:45:28,765 INFO L933 BasicCegarLoop]: 4386 mSDtfsCounter, 4626 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4653 SdHoareTripleChecker+Valid, 16731 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:28,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4653 Valid, 16731 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:45:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10132 states. [2021-12-17 18:45:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10132 to 8642. [2021-12-17 18:45:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 7726 states have (on average 1.572741392699974) internal successors, (12151), 7793 states have internal predecessors, (12151), 566 states have call successors, (566), 300 states have call predecessors, (566), 348 states have return successors, (923), 580 states have call predecessors, (923), 566 states have call successors, (923) [2021-12-17 18:45:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 13640 transitions. [2021-12-17 18:45:29,154 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 13640 transitions. Word has length 79 [2021-12-17 18:45:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:29,154 INFO L470 AbstractCegarLoop]: Abstraction has 8642 states and 13640 transitions. [2021-12-17 18:45:29,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:45:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 13640 transitions. [2021-12-17 18:45:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:45:29,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:29,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:29,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 18:45:29,172 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:29,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-12-17 18:45:29,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:29,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484276861] [2021-12-17 18:45:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:29,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:45:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:45:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:45:29,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484276861] [2021-12-17 18:45:29,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484276861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:29,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497630792] [2021-12-17 18:45:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:29,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:29,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:29,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:45:29,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 18:45:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:29,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:45:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 18:45:29,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:29,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497630792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:29,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:29,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:45:29,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549798101] [2021-12-17 18:45:29,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:29,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:29,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:29,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:29,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:29,672 INFO L87 Difference]: Start difference. First operand 8642 states and 13640 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:45:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:30,157 INFO L93 Difference]: Finished difference Result 21481 states and 32916 transitions. [2021-12-17 18:45:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:30,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-17 18:45:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:30,203 INFO L225 Difference]: With dead ends: 21481 [2021-12-17 18:45:30,204 INFO L226 Difference]: Without dead ends: 14972 [2021-12-17 18:45:30,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:30,226 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4135 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4135 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:30,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4135 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:45:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14972 states. [2021-12-17 18:45:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14972 to 14870. [2021-12-17 18:45:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14870 states, 13070 states have (on average 1.5247130833970926) internal successors, (19928), 13202 states have internal predecessors, (19928), 1102 states have call successors, (1102), 600 states have call predecessors, (1102), 696 states have return successors, (1785), 1099 states have call predecessors, (1785), 1102 states have call successors, (1785) [2021-12-17 18:45:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14870 states to 14870 states and 22815 transitions. [2021-12-17 18:45:30,741 INFO L78 Accepts]: Start accepts. Automaton has 14870 states and 22815 transitions. Word has length 128 [2021-12-17 18:45:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:30,741 INFO L470 AbstractCegarLoop]: Abstraction has 14870 states and 22815 transitions. [2021-12-17 18:45:30,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:45:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 14870 states and 22815 transitions. [2021-12-17 18:45:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:45:30,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:30,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:30,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 18:45:30,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:30,983 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-12-17 18:45:30,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:30,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903886000] [2021-12-17 18:45:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:30,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:45:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:45:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:45:31,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:31,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903886000] [2021-12-17 18:45:31,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903886000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:31,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218703616] [2021-12-17 18:45:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:31,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:31,090 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:45:31,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 18:45:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:31,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:45:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 18:45:31,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:31,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218703616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:31,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:31,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:45:31,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945775559] [2021-12-17 18:45:31,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:31,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:31,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:31,391 INFO L87 Difference]: Start difference. First operand 14870 states and 22815 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:45:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:32,196 INFO L93 Difference]: Finished difference Result 39843 states and 60157 transitions. [2021-12-17 18:45:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:32,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-17 18:45:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:32,293 INFO L225 Difference]: With dead ends: 39843 [2021-12-17 18:45:32,294 INFO L226 Difference]: Without dead ends: 27106 [2021-12-17 18:45:32,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:32,343 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4129 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4129 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:32,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4129 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:45:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27106 states. [2021-12-17 18:45:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27106 to 26904. [2021-12-17 18:45:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 23410 states have (on average 1.494404100811619) internal successors, (34984), 23672 states have internal predecessors, (34984), 2100 states have call successors, (2100), 1200 states have call predecessors, (2100), 1392 states have return successors, (3435), 2063 states have call predecessors, (3435), 2100 states have call successors, (3435) [2021-12-17 18:45:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 40519 transitions. [2021-12-17 18:45:33,276 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 40519 transitions. Word has length 128 [2021-12-17 18:45:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:33,276 INFO L470 AbstractCegarLoop]: Abstraction has 26904 states and 40519 transitions. [2021-12-17 18:45:33,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:45:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 40519 transitions. [2021-12-17 18:45:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:45:33,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:33,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:33,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 18:45:33,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 18:45:33,535 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:33,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-12-17 18:45:33,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:33,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458637635] [2021-12-17 18:45:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:33,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:45:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:45:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:45:33,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:33,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458637635] [2021-12-17 18:45:33,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458637635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:33,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324932592] [2021-12-17 18:45:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:33,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:33,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:33,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:45:33,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 18:45:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:33,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:45:33,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 18:45:33,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:33,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324932592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:33,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:33,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:45:33,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375685480] [2021-12-17 18:45:33,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:33,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:33,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:33,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:33,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:33,930 INFO L87 Difference]: Start difference. First operand 26904 states and 40519 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 18:45:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:35,349 INFO L93 Difference]: Finished difference Result 75433 states and 113453 transitions. [2021-12-17 18:45:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:35,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2021-12-17 18:45:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:35,589 INFO L225 Difference]: With dead ends: 75433 [2021-12-17 18:45:35,589 INFO L226 Difference]: Without dead ends: 50663 [2021-12-17 18:45:35,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:35,657 INFO L933 BasicCegarLoop]: 4380 mSDtfsCounter, 193 mSDsluCounter, 4179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 8559 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:35,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 8559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:45:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50663 states. [2021-12-17 18:45:37,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50663 to 50663. [2021-12-17 18:45:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50663 states, 43814 states have (on average 1.4695531108778017) internal successors, (64387), 44269 states have internal predecessors, (64387), 4063 states have call successors, (4063), 2400 states have call predecessors, (4063), 2784 states have return successors, (7494), 4057 states have call predecessors, (7494), 4063 states have call successors, (7494) [2021-12-17 18:45:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50663 states to 50663 states and 75944 transitions. [2021-12-17 18:45:37,597 INFO L78 Accepts]: Start accepts. Automaton has 50663 states and 75944 transitions. Word has length 128 [2021-12-17 18:45:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:37,598 INFO L470 AbstractCegarLoop]: Abstraction has 50663 states and 75944 transitions. [2021-12-17 18:45:37,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 18:45:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 50663 states and 75944 transitions. [2021-12-17 18:45:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 18:45:37,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:37,729 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:37,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 18:45:37,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:37,943 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-12-17 18:45:37,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:37,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371481457] [2021-12-17 18:45:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:37,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:37,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:37,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:37,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:38,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:38,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:38,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:45:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:38,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:38,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 18:45:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:38,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:38,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 18:45:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 18:45:38,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:38,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371481457] [2021-12-17 18:45:38,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371481457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:38,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907372786] [2021-12-17 18:45:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:38,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:38,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:38,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:45:38,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 18:45:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:45:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 18:45:38,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:38,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907372786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:38,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:38,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:45:38,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266508733] [2021-12-17 18:45:38,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:38,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:38,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:38,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:38,476 INFO L87 Difference]: Start difference. First operand 50663 states and 75944 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 18:45:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:40,956 INFO L93 Difference]: Finished difference Result 145415 states and 218067 transitions. [2021-12-17 18:45:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:40,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-12-17 18:45:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:41,353 INFO L225 Difference]: With dead ends: 145415 [2021-12-17 18:45:41,353 INFO L226 Difference]: Without dead ends: 96891 [2021-12-17 18:45:41,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:41,693 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4085 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 4397 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:41,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4085 Valid, 4397 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:45:41,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96891 states. [2021-12-17 18:45:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96891 to 96089. [2021-12-17 18:45:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96089 states, 82996 states have (on average 1.4590703166417658) internal successors, (121097), 83903 states have internal predecessors, (121097), 7621 states have call successors, (7621), 4702 states have call predecessors, (7621), 5470 states have return successors, (14146), 7547 states have call predecessors, (14146), 7621 states have call successors, (14146) [2021-12-17 18:45:45,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96089 states to 96089 states and 142864 transitions. [2021-12-17 18:45:45,150 INFO L78 Accepts]: Start accepts. Automaton has 96089 states and 142864 transitions. Word has length 166 [2021-12-17 18:45:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:45,150 INFO L470 AbstractCegarLoop]: Abstraction has 96089 states and 142864 transitions. [2021-12-17 18:45:45,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 18:45:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 96089 states and 142864 transitions. [2021-12-17 18:45:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 18:45:45,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:45,445 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:45,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 18:45:45,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:45,669 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:45,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash 399987983, now seen corresponding path program 1 times [2021-12-17 18:45:45,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:45,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941493971] [2021-12-17 18:45:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:45,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 18:45:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:45:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 18:45:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 18:45:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 18:45:45,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:45,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941493971] [2021-12-17 18:45:45,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941493971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:45,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322851853] [2021-12-17 18:45:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:45,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:45,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:45,800 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:45:45,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 18:45:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:45:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 18:45:46,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:46,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322851853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:46,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:46,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:45:46,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568539030] [2021-12-17 18:45:46,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:46,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:46,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:46,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:46,484 INFO L87 Difference]: Start difference. First operand 96089 states and 142864 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 18:45:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:45:49,820 INFO L93 Difference]: Finished difference Result 202199 states and 303485 transitions. [2021-12-17 18:45:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:45:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2021-12-17 18:45:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:45:50,188 INFO L225 Difference]: With dead ends: 202199 [2021-12-17 18:45:50,189 INFO L226 Difference]: Without dead ends: 108251 [2021-12-17 18:45:50,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:50,363 INFO L933 BasicCegarLoop]: 4178 mSDtfsCounter, 4108 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4108 SdHoareTripleChecker+Valid, 4222 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:45:50,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4108 Valid, 4222 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:45:50,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-12-17 18:45:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 108251. [2021-12-17 18:45:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108251 states, 94154 states have (on average 1.4208105869108056) internal successors, (133775), 95061 states have internal predecessors, (133775), 7923 states have call successors, (7923), 5404 states have call predecessors, (7923), 6172 states have return successors, (14574), 7849 states have call predecessors, (14574), 7923 states have call successors, (14574) [2021-12-17 18:45:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108251 states to 108251 states and 156272 transitions. [2021-12-17 18:45:54,423 INFO L78 Accepts]: Start accepts. Automaton has 108251 states and 156272 transitions. Word has length 184 [2021-12-17 18:45:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:45:54,423 INFO L470 AbstractCegarLoop]: Abstraction has 108251 states and 156272 transitions. [2021-12-17 18:45:54,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 18:45:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 108251 states and 156272 transitions. [2021-12-17 18:45:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 18:45:54,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:45:54,663 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:45:54,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 18:45:54,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 18:45:54,879 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:45:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:45:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1248051052, now seen corresponding path program 1 times [2021-12-17 18:45:54,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:45:54,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671477984] [2021-12-17 18:45:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:54,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:45:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:45:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:45:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:45:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:45:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:45:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 18:45:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:45:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 18:45:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:45:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 18:45:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 18:45:55,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:45:55,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671477984] [2021-12-17 18:45:55,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671477984] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:45:55,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98622181] [2021-12-17 18:45:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:45:55,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:45:55,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:55,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 18:45:55,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 18:45:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:45:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:45:55,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:45:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 18:45:55,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:45:55,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98622181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:45:55,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:45:55,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:45:55,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218244254] [2021-12-17 18:45:55,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:45:55,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:45:55,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:45:55,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:45:55,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:45:55,699 INFO L87 Difference]: Start difference. First operand 108251 states and 156272 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)