./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.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.05.cil-1.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 e270b9f7665b1c8abbbdbbd0440b4b4aa4509b75796aa73b96f40d2382c01832 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 18:45:52,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 18:45:52,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 18:45:52,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 18:45:52,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 18:45:52,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 18:45:52,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 18:45:52,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 18:45:52,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 18:45:52,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 18:45:52,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 18:45:52,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 18:45:52,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 18:45:52,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 18:45:52,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 18:45:52,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 18:45:52,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 18:45:52,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 18:45:52,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 18:45:52,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 18:45:52,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 18:45:52,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 18:45:52,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 18:45:52,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 18:45:52,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 18:45:52,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 18:45:52,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 18:45:52,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 18:45:52,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 18:45:52,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 18:45:52,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 18:45:52,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 18:45:52,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 18:45:52,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 18:45:52,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 18:45:52,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 18:45:52,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 18:45:52,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 18:45:52,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 18:45:52,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 18:45:52,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 18:45:52,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 18:45:52,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 18:45:52,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 18:45:52,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 18:45:52,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 18:45:52,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 18:45:52,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 18:45:52,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 18:45:52,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 18:45:52,406 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 18:45:52,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 18:45:52,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 18:45:52,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 18:45:52,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 18:45:52,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 18:45:52,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 18:45:52,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 18:45:52,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 18:45:52,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 18:45:52,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 18:45:52,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 18:45:52,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 18:45:52,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 18:45:52,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 18:45:52,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 18:45:52,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:45:52,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 18:45:52,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 18:45:52,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 18:45:52,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 18:45:52,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 18:45:52,410 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 18:45:52,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 18:45:52,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 18:45:52,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 18:45:52,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e270b9f7665b1c8abbbdbbd0440b4b4aa4509b75796aa73b96f40d2382c01832 [2021-12-17 18:45:52,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 18:45:52,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 18:45:52,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 18:45:52,623 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 18:45:52,623 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 18:45:52,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.c [2021-12-17 18:45:52,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e74bde1ad/909bc6d9bb1b493ab7d6f0f882a6b4ee/FLAG33818af22 [2021-12-17 18:45:53,405 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 18:45:53,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.c [2021-12-17 18:45:53,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e74bde1ad/909bc6d9bb1b493ab7d6f0f882a6b4ee/FLAG33818af22 [2021-12-17 18:45:53,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e74bde1ad/909bc6d9bb1b493ab7d6f0f882a6b4ee [2021-12-17 18:45:53,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 18:45:53,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 18:45:53,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 18:45:53,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 18:45:53,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 18:45:53,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:45:53" (1/1) ... [2021-12-17 18:45:53,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c3292bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:53, skipping insertion in model container [2021-12-17 18:45:53,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:45:53" (1/1) ... [2021-12-17 18:45:53,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 18:45:53,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 18:45:54,952 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.05.cil-1.c[377069,377082] [2021-12-17 18:45:54,981 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.05.cil-1.c[383339,383352] [2021-12-17 18:45:55,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:45:55,103 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 18:45:55,664 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.05.cil-1.c[377069,377082] [2021-12-17 18:45:55,674 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.05.cil-1.c[383339,383352] [2021-12-17 18:45:55,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:45:55,796 INFO L208 MainTranslator]: Completed translation [2021-12-17 18:45:55,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55 WrapperNode [2021-12-17 18:45:55,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 18:45:55,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 18:45:55,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 18:45:55,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 18:45:55,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:55,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:56,162 INFO L137 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2021-12-17 18:45:56,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 18:45:56,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 18:45:56,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 18:45:56,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 18:45:56,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:56,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:56,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:56,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:56,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:56,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:56,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:56,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 18:45:56,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 18:45:56,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 18:45:56,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 18:45:56,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (1/1) ... [2021-12-17 18:45:56,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:45:56,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:45:56,569 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 18:45:56,587 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 18:45:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 18:45:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 18:45:56,604 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 18:45:56,604 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 18:45:56,604 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 18:45:56,604 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 18:45:56,604 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 18:45:56,604 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 18:45:56,604 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 18:45:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 18:45:56,605 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 18:45:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 18:45:56,605 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 18:45:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 18:45:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 18:45:56,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 18:45:56,693 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 18:45:56,694 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 18:46:01,806 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 18:46:01,830 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 18:46:01,830 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-17 18:46:01,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:46:01 BoogieIcfgContainer [2021-12-17 18:46:01,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 18:46:01,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 18:46:01,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 18:46:01,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 18:46:01,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 06:45:53" (1/3) ... [2021-12-17 18:46:01,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468afc88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:46:01, skipping insertion in model container [2021-12-17 18:46:01,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:45:55" (2/3) ... [2021-12-17 18:46:01,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468afc88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:46:01, skipping insertion in model container [2021-12-17 18:46:01,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:46:01" (3/3) ... [2021-12-17 18:46:01,839 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.05.cil-1.c [2021-12-17 18:46:01,842 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 18:46:01,842 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 18:46:01,878 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 18:46:01,882 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 18:46:01,883 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 18:46:01,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 2390 states, 2362 states have (on average 1.8526672311600338) internal successors, (4376), 2365 states have internal predecessors, (4376), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 18:46:01,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:01,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:01,928 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, 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 18:46:01,928 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1427785225, now seen corresponding path program 1 times [2021-12-17 18:46:01,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:01,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072627642] [2021-12-17 18:46:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:01,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:02,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:02,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:02,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:02,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:02,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:02,266 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 18:46:02,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:02,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072627642] [2021-12-17 18:46:02,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072627642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:02,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:02,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 18:46:02,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208515880] [2021-12-17 18:46:02,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:02,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 18:46:02,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 18:46:02,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 18:46:02,300 INFO L87 Difference]: Start difference. First operand has 2390 states, 2362 states have (on average 1.8526672311600338) internal successors, (4376), 2365 states have internal predecessors, (4376), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:46:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:03,028 INFO L93 Difference]: Finished difference Result 4837 states and 8925 transitions. [2021-12-17 18:46:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 18:46:03,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-17 18:46:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:03,046 INFO L225 Difference]: With dead ends: 4837 [2021-12-17 18:46:03,047 INFO L226 Difference]: Without dead ends: 2388 [2021-12-17 18:46:03,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:46:03,055 INFO L933 BasicCegarLoop]: 4361 mSDtfsCounter, 507 mSDsluCounter, 12296 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 16657 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:03,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 16657 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 18:46:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-12-17 18:46:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2323. [2021-12-17 18:46:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2296 states have (on average 1.84102787456446) internal successors, (4227), 2298 states have internal predecessors, (4227), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 18:46:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 4265 transitions. [2021-12-17 18:46:03,142 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 4265 transitions. Word has length 101 [2021-12-17 18:46:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:03,143 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 4265 transitions. [2021-12-17 18:46:03,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:46:03,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 4265 transitions. [2021-12-17 18:46:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:03,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:03,147 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, 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 18:46:03,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 18:46:03,147 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:03,148 INFO L85 PathProgramCache]: Analyzing trace with hash 990118841, now seen corresponding path program 1 times [2021-12-17 18:46:03,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:03,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131611316] [2021-12-17 18:46:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:03,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:03,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:03,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:03,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:03,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:03,283 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 18:46:03,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:03,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131611316] [2021-12-17 18:46:03,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131611316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:03,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:03,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:46:03,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729738633] [2021-12-17 18:46:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:03,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:46:03,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:46:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:46:03,286 INFO L87 Difference]: Start difference. First operand 2323 states and 4265 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 18:46:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:04,278 INFO L93 Difference]: Finished difference Result 2835 states and 5072 transitions. [2021-12-17 18:46:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:46:04,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:04,287 INFO L225 Difference]: With dead ends: 2835 [2021-12-17 18:46:04,288 INFO L226 Difference]: Without dead ends: 2646 [2021-12-17 18:46:04,289 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 18:46:04,303 INFO L933 BasicCegarLoop]: 4316 mSDtfsCounter, 4705 mSDsluCounter, 12418 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4717 SdHoareTripleChecker+Valid, 16734 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:04,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4717 Valid, 16734 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:46:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-12-17 18:46:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2517. [2021-12-17 18:46:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2469 states have (on average 1.820980153908465) internal successors, (4496), 2472 states have internal predecessors, (4496), 33 states have call successors, (33), 12 states have call predecessors, (33), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-17 18:46:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 4565 transitions. [2021-12-17 18:46:04,349 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 4565 transitions. Word has length 101 [2021-12-17 18:46:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:04,350 INFO L470 AbstractCegarLoop]: Abstraction has 2517 states and 4565 transitions. [2021-12-17 18:46:04,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 18:46:04,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 4565 transitions. [2021-12-17 18:46:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:04,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:04,352 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, 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 18:46:04,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 18:46:04,353 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash -726765763, now seen corresponding path program 1 times [2021-12-17 18:46:04,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:04,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046699279] [2021-12-17 18:46:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:04,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:04,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:04,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:04,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:04,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:04,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:04,511 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 18:46:04,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:04,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046699279] [2021-12-17 18:46:04,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046699279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:04,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:04,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:46:04,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121089478] [2021-12-17 18:46:04,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:04,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:46:04,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:04,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:46:04,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:46:04,516 INFO L87 Difference]: Start difference. First operand 2517 states and 4565 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:05,681 INFO L93 Difference]: Finished difference Result 3293 states and 5783 transitions. [2021-12-17 18:46:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:46:05,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:05,690 INFO L225 Difference]: With dead ends: 3293 [2021-12-17 18:46:05,690 INFO L226 Difference]: Without dead ends: 2910 [2021-12-17 18:46:05,691 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 18:46:05,692 INFO L933 BasicCegarLoop]: 4461 mSDtfsCounter, 4711 mSDsluCounter, 16854 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4723 SdHoareTripleChecker+Valid, 21315 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:05,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4723 Valid, 21315 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:46:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-12-17 18:46:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2698. [2021-12-17 18:46:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 2629 states have (on average 1.8025865348041081) internal successors, (4739), 2633 states have internal predecessors, (4739), 47 states have call successors, (47), 18 states have call predecessors, (47), 20 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-17 18:46:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 4838 transitions. [2021-12-17 18:46:05,739 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 4838 transitions. Word has length 101 [2021-12-17 18:46:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:05,739 INFO L470 AbstractCegarLoop]: Abstraction has 2698 states and 4838 transitions. [2021-12-17 18:46:05,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 4838 transitions. [2021-12-17 18:46:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:05,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:05,741 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, 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 18:46:05,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 18:46:05,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:05,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1689070587, now seen corresponding path program 1 times [2021-12-17 18:46:05,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:05,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550542478] [2021-12-17 18:46:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:05,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:05,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:05,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:05,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:05,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:05,864 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 18:46:05,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:05,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550542478] [2021-12-17 18:46:05,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550542478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:05,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:05,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:46:05,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111888451] [2021-12-17 18:46:05,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:05,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:46:05,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:05,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:46:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:46:05,867 INFO L87 Difference]: Start difference. First operand 2698 states and 4838 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:07,147 INFO L93 Difference]: Finished difference Result 3966 states and 6824 transitions. [2021-12-17 18:46:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:46:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:07,161 INFO L225 Difference]: With dead ends: 3966 [2021-12-17 18:46:07,161 INFO L226 Difference]: Without dead ends: 3402 [2021-12-17 18:46:07,165 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 18:46:07,166 INFO L933 BasicCegarLoop]: 4449 mSDtfsCounter, 4705 mSDsluCounter, 16850 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4717 SdHoareTripleChecker+Valid, 21299 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:07,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4717 Valid, 21299 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 18:46:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2021-12-17 18:46:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3064. [2021-12-17 18:46:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 2953 states have (on average 1.771757534710464) internal successors, (5232), 2959 states have internal predecessors, (5232), 75 states have call successors, (75), 30 states have call predecessors, (75), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-17 18:46:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 5395 transitions. [2021-12-17 18:46:07,251 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 5395 transitions. Word has length 101 [2021-12-17 18:46:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:07,252 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 5395 transitions. [2021-12-17 18:46:07,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 5395 transitions. [2021-12-17 18:46:07,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:07,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:07,254 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, 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 18:46:07,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 18:46:07,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:07,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1039138759, now seen corresponding path program 1 times [2021-12-17 18:46:07,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:07,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752769304] [2021-12-17 18:46:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:07,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:07,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:07,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:07,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:07,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:07,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:07,345 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 18:46:07,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:07,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752769304] [2021-12-17 18:46:07,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752769304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:07,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:07,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:46:07,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535396668] [2021-12-17 18:46:07,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:07,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:46:07,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:46:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:46:07,348 INFO L87 Difference]: Start difference. First operand 3064 states and 5395 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:08,852 INFO L93 Difference]: Finished difference Result 5270 states and 8833 transitions. [2021-12-17 18:46:08,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:46:08,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:08,867 INFO L225 Difference]: With dead ends: 5270 [2021-12-17 18:46:08,867 INFO L226 Difference]: Without dead ends: 4340 [2021-12-17 18:46:08,870 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 18:46:08,871 INFO L933 BasicCegarLoop]: 4444 mSDtfsCounter, 4704 mSDsluCounter, 16850 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4716 SdHoareTripleChecker+Valid, 21294 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:08,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4716 Valid, 21294 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 18:46:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4340 states. [2021-12-17 18:46:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4340 to 3797. [2021-12-17 18:46:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3602 states have (on average 1.7262631871182677) internal successors, (6218), 3612 states have internal predecessors, (6218), 131 states have call successors, (131), 54 states have call predecessors, (131), 62 states have return successors, (166), 138 states have call predecessors, (166), 131 states have call successors, (166) [2021-12-17 18:46:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6515 transitions. [2021-12-17 18:46:08,998 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6515 transitions. Word has length 101 [2021-12-17 18:46:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:08,999 INFO L470 AbstractCegarLoop]: Abstraction has 3797 states and 6515 transitions. [2021-12-17 18:46:08,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6515 transitions. [2021-12-17 18:46:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:09,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:09,002 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, 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 18:46:09,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 18:46:09,002 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:09,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:09,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2096976837, now seen corresponding path program 1 times [2021-12-17 18:46:09,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:09,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901114044] [2021-12-17 18:46:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:09,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:09,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:09,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:09,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:09,093 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 18:46:09,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:09,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901114044] [2021-12-17 18:46:09,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901114044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:09,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:09,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:46:09,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848359445] [2021-12-17 18:46:09,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:09,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:46:09,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:46:09,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:46:09,096 INFO L87 Difference]: Start difference. First operand 3797 states and 6515 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:10,500 INFO L93 Difference]: Finished difference Result 7877 states and 12867 transitions. [2021-12-17 18:46:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:46:10,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:10,524 INFO L225 Difference]: With dead ends: 7877 [2021-12-17 18:46:10,524 INFO L226 Difference]: Without dead ends: 6214 [2021-12-17 18:46:10,532 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 18:46:10,533 INFO L933 BasicCegarLoop]: 4439 mSDtfsCounter, 4703 mSDsluCounter, 16850 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4715 SdHoareTripleChecker+Valid, 21289 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:10,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4715 Valid, 21289 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 18:46:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2021-12-17 18:46:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 5270. [2021-12-17 18:46:10,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5270 states, 4907 states have (on average 1.6710821275728551) internal successors, (8200), 4925 states have internal predecessors, (8200), 243 states have call successors, (243), 102 states have call predecessors, (243), 118 states have return successors, (340), 258 states have call predecessors, (340), 243 states have call successors, (340) [2021-12-17 18:46:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 8783 transitions. [2021-12-17 18:46:10,709 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 8783 transitions. Word has length 101 [2021-12-17 18:46:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:10,709 INFO L470 AbstractCegarLoop]: Abstraction has 5270 states and 8783 transitions. [2021-12-17 18:46:10,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 8783 transitions. [2021-12-17 18:46:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:10,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:10,720 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, 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 18:46:10,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 18:46:10,720 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:10,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1055487993, now seen corresponding path program 1 times [2021-12-17 18:46:10,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:10,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464714961] [2021-12-17 18:46:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:10,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:10,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:10,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:10,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:10,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:10,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:10,807 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 18:46:10,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:10,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464714961] [2021-12-17 18:46:10,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464714961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:10,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:10,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:46:10,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800759326] [2021-12-17 18:46:10,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:10,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:46:10,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:10,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:46:10,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:46:10,809 INFO L87 Difference]: Start difference. First operand 5270 states and 8783 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:11,603 INFO L93 Difference]: Finished difference Result 9374 states and 15248 transitions. [2021-12-17 18:46:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:46:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:11,636 INFO L225 Difference]: With dead ends: 9374 [2021-12-17 18:46:11,636 INFO L226 Difference]: Without dead ends: 6238 [2021-12-17 18:46:11,647 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 18:46:11,648 INFO L933 BasicCegarLoop]: 4245 mSDtfsCounter, 4525 mSDsluCounter, 16313 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4538 SdHoareTripleChecker+Valid, 20558 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:11,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4538 Valid, 20558 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 18:46:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-12-17 18:46:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5270. [2021-12-17 18:46:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5270 states, 4907 states have (on average 1.667617689015692) internal successors, (8183), 4925 states have internal predecessors, (8183), 243 states have call successors, (243), 102 states have call predecessors, (243), 118 states have return successors, (340), 258 states have call predecessors, (340), 243 states have call successors, (340) [2021-12-17 18:46:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5270 states to 5270 states and 8766 transitions. [2021-12-17 18:46:11,841 INFO L78 Accepts]: Start accepts. Automaton has 5270 states and 8766 transitions. Word has length 101 [2021-12-17 18:46:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:11,842 INFO L470 AbstractCegarLoop]: Abstraction has 5270 states and 8766 transitions. [2021-12-17 18:46:11,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5270 states and 8766 transitions. [2021-12-17 18:46:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:11,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:11,845 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, 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 18:46:11,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 18:46:11,846 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:11,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:11,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1295727739, now seen corresponding path program 1 times [2021-12-17 18:46:11,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:11,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134117653] [2021-12-17 18:46:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:11,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:11,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:11,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:11,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:11,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:11,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:11,925 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 18:46:11,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:11,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134117653] [2021-12-17 18:46:11,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134117653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:11,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:11,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:46:11,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323522764] [2021-12-17 18:46:11,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:11,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:46:11,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:46:11,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:46:11,927 INFO L87 Difference]: Start difference. First operand 5270 states and 8766 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:13,365 INFO L93 Difference]: Finished difference Result 14146 states and 22495 transitions. [2021-12-17 18:46:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:46:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:13,398 INFO L225 Difference]: With dead ends: 14146 [2021-12-17 18:46:13,398 INFO L226 Difference]: Without dead ends: 11010 [2021-12-17 18:46:13,410 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 18:46:13,411 INFO L933 BasicCegarLoop]: 4501 mSDtfsCounter, 4737 mSDsluCounter, 16839 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4748 SdHoareTripleChecker+Valid, 21340 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:13,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4748 Valid, 21340 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1668 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 18:46:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2021-12-17 18:46:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 8120. [2021-12-17 18:46:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 7437 states have (on average 1.6150329433911523) internal successors, (12011), 7471 states have internal predecessors, (12011), 451 states have call successors, (451), 198 states have call predecessors, (451), 230 states have return successors, (726), 482 states have call predecessors, (726), 451 states have call successors, (726) [2021-12-17 18:46:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 13188 transitions. [2021-12-17 18:46:13,720 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 13188 transitions. Word has length 101 [2021-12-17 18:46:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:13,730 INFO L470 AbstractCegarLoop]: Abstraction has 8120 states and 13188 transitions. [2021-12-17 18:46:13,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:13,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 13188 transitions. [2021-12-17 18:46:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:13,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:13,762 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, 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 18:46:13,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 18:46:13,762 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:13,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:13,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2134761401, now seen corresponding path program 1 times [2021-12-17 18:46:13,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:13,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575987834] [2021-12-17 18:46:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:13,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:13,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:13,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:13,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:13,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:13,855 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 18:46:13,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:13,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575987834] [2021-12-17 18:46:13,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575987834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:13,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:13,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:46:13,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78755858] [2021-12-17 18:46:13,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:13,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:46:13,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:46:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:46:13,859 INFO L87 Difference]: Start difference. First operand 8120 states and 13188 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:14,788 INFO L93 Difference]: Finished difference Result 15838 states and 25379 transitions. [2021-12-17 18:46:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:46:14,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:14,814 INFO L225 Difference]: With dead ends: 15838 [2021-12-17 18:46:14,814 INFO L226 Difference]: Without dead ends: 9852 [2021-12-17 18:46:14,829 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 18:46:14,831 INFO L933 BasicCegarLoop]: 4250 mSDtfsCounter, 4502 mSDsluCounter, 16314 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4515 SdHoareTripleChecker+Valid, 20564 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:14,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4515 Valid, 20564 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 18:46:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9852 states. [2021-12-17 18:46:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9852 to 8120. [2021-12-17 18:46:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 7437 states have (on average 1.6105956702971629) internal successors, (11978), 7471 states have internal predecessors, (11978), 451 states have call successors, (451), 198 states have call predecessors, (451), 230 states have return successors, (726), 482 states have call predecessors, (726), 451 states have call successors, (726) [2021-12-17 18:46:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 13155 transitions. [2021-12-17 18:46:15,164 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 13155 transitions. Word has length 101 [2021-12-17 18:46:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:15,165 INFO L470 AbstractCegarLoop]: Abstraction has 8120 states and 13155 transitions. [2021-12-17 18:46:15,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 13155 transitions. [2021-12-17 18:46:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:15,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:15,169 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, 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 18:46:15,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 18:46:15,169 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:15,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2133140293, now seen corresponding path program 1 times [2021-12-17 18:46:15,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:15,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375014857] [2021-12-17 18:46:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:15,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:15,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:15,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:15,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:15,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:15,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:15,233 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 18:46:15,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:15,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375014857] [2021-12-17 18:46:15,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375014857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:15,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:15,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:46:15,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247916678] [2021-12-17 18:46:15,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:15,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:46:15,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:46:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:46:15,235 INFO L87 Difference]: Start difference. First operand 8120 states and 13155 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:17,040 INFO L93 Difference]: Finished difference Result 24368 states and 38351 transitions. [2021-12-17 18:46:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:46:17,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:17,112 INFO L225 Difference]: With dead ends: 24368 [2021-12-17 18:46:17,113 INFO L226 Difference]: Without dead ends: 18382 [2021-12-17 18:46:17,134 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 18:46:17,135 INFO L933 BasicCegarLoop]: 4413 mSDtfsCounter, 4786 mSDsluCounter, 16842 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4804 SdHoareTripleChecker+Valid, 21255 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:17,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4804 Valid, 21255 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 18:46:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18382 states. [2021-12-17 18:46:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18382 to 13914. [2021-12-17 18:46:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13914 states, 12607 states have (on average 1.568493693979535) internal successors, (19774), 12673 states have internal predecessors, (19774), 851 states have call successors, (851), 390 states have call predecessors, (851), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-17 18:46:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13914 states to 13914 states and 22269 transitions. [2021-12-17 18:46:17,733 INFO L78 Accepts]: Start accepts. Automaton has 13914 states and 22269 transitions. Word has length 101 [2021-12-17 18:46:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:17,734 INFO L470 AbstractCegarLoop]: Abstraction has 13914 states and 22269 transitions. [2021-12-17 18:46:17,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 13914 states and 22269 transitions. [2021-12-17 18:46:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:17,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:17,745 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, 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 18:46:17,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 18:46:17,745 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 84490105, now seen corresponding path program 1 times [2021-12-17 18:46:17,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:17,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811557154] [2021-12-17 18:46:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:17,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:17,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:17,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:17,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:17,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:17,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:17,828 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 18:46:17,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:17,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811557154] [2021-12-17 18:46:17,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811557154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:17,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:17,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:46:17,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106006254] [2021-12-17 18:46:17,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:17,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:46:17,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:17,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:46:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:46:17,831 INFO L87 Difference]: Start difference. First operand 13914 states and 22269 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:18,752 INFO L93 Difference]: Finished difference Result 28764 states and 45950 transitions. [2021-12-17 18:46:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:46:18,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:18,798 INFO L225 Difference]: With dead ends: 28764 [2021-12-17 18:46:18,798 INFO L226 Difference]: Without dead ends: 16984 [2021-12-17 18:46:18,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 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 18:46:18,995 INFO L933 BasicCegarLoop]: 4240 mSDtfsCounter, 4584 mSDsluCounter, 12253 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4597 SdHoareTripleChecker+Valid, 16493 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:18,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4597 Valid, 16493 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 18:46:19,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16984 states. [2021-12-17 18:46:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16984 to 13914. [2021-12-17 18:46:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13914 states, 12607 states have (on average 1.5633378281906878) internal successors, (19709), 12673 states have internal predecessors, (19709), 851 states have call successors, (851), 390 states have call predecessors, (851), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-17 18:46:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13914 states to 13914 states and 22204 transitions. [2021-12-17 18:46:19,597 INFO L78 Accepts]: Start accepts. Automaton has 13914 states and 22204 transitions. Word has length 101 [2021-12-17 18:46:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:19,597 INFO L470 AbstractCegarLoop]: Abstraction has 13914 states and 22204 transitions. [2021-12-17 18:46:19,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 18:46:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 13914 states and 22204 transitions. [2021-12-17 18:46:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 18:46:19,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:19,606 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, 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 18:46:19,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 18:46:19,606 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:19,607 INFO L85 PathProgramCache]: Analyzing trace with hash 971712951, now seen corresponding path program 1 times [2021-12-17 18:46:19,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:19,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8938879] [2021-12-17 18:46:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:19,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:19,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:19,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:19,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:19,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:19,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:19,667 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 18:46:19,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:19,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8938879] [2021-12-17 18:46:19,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8938879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:19,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:46:19,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:46:19,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731950038] [2021-12-17 18:46:19,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:19,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:46:19,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:19,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:46:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:46:19,670 INFO L87 Difference]: Start difference. First operand 13914 states and 22204 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 18:46:21,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:21,549 INFO L93 Difference]: Finished difference Result 36093 states and 56590 transitions. [2021-12-17 18:46:21,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:46:21,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 101 [2021-12-17 18:46:21,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:21,624 INFO L225 Difference]: With dead ends: 36093 [2021-12-17 18:46:21,624 INFO L226 Difference]: Without dead ends: 24314 [2021-12-17 18:46:21,644 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 18:46:21,644 INFO L933 BasicCegarLoop]: 4556 mSDtfsCounter, 4907 mSDsluCounter, 12519 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4938 SdHoareTripleChecker+Valid, 17075 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:46:21,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4938 Valid, 17075 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 18:46:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24314 states. [2021-12-17 18:46:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24314 to 19813. [2021-12-17 18:46:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19813 states, 17829 states have (on average 1.536822031521678) internal successors, (27400), 17960 states have internal predecessors, (27400), 1298 states have call successors, (1298), 588 states have call predecessors, (1298), 684 states have return successors, (2335), 1328 states have call predecessors, (2335), 1298 states have call successors, (2335) [2021-12-17 18:46:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19813 states to 19813 states and 31033 transitions. [2021-12-17 18:46:22,242 INFO L78 Accepts]: Start accepts. Automaton has 19813 states and 31033 transitions. Word has length 101 [2021-12-17 18:46:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:22,242 INFO L470 AbstractCegarLoop]: Abstraction has 19813 states and 31033 transitions. [2021-12-17 18:46:22,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 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 18:46:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 19813 states and 31033 transitions. [2021-12-17 18:46:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 18:46:22,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:22,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:46:22,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 18:46:22,279 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:22,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:22,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1967377923, now seen corresponding path program 1 times [2021-12-17 18:46:22,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:22,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315491462] [2021-12-17 18:46:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:22,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 18:46:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:46:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 18:46:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:46:22,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:22,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315491462] [2021-12-17 18:46:22,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315491462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:46:22,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502385363] [2021-12-17 18:46:22,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:22,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:46:22,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:46:22,364 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 18:46:22,364 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 18:46:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:22,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:46:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:46:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 18:46:22,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:46:22,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502385363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:22,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:46:22,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:46:22,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824822951] [2021-12-17 18:46:22,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:22,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:46:22,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:46:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:46:22,700 INFO L87 Difference]: Start difference. First operand 19813 states and 31033 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 18:46:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:23,639 INFO L93 Difference]: Finished difference Result 54822 states and 85237 transitions. [2021-12-17 18:46:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:46:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 164 [2021-12-17 18:46:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:23,726 INFO L225 Difference]: With dead ends: 54822 [2021-12-17 18:46:23,727 INFO L226 Difference]: Without dead ends: 37144 [2021-12-17 18:46:23,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 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 18:46:23,770 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4208 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4208 SdHoareTripleChecker+Valid, 4545 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 18:46:23,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4208 Valid, 4545 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:46:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37144 states. [2021-12-17 18:46:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37144 to 36946. [2021-12-17 18:46:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36946 states, 33034 states have (on average 1.5147726584730883) internal successors, (50039), 33294 states have internal predecessors, (50039), 2542 states have call successors, (2542), 1176 states have call predecessors, (2542), 1368 states have return successors, (4553), 2539 states have call predecessors, (4553), 2542 states have call successors, (4553) [2021-12-17 18:46:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36946 states to 36946 states and 57134 transitions. [2021-12-17 18:46:25,050 INFO L78 Accepts]: Start accepts. Automaton has 36946 states and 57134 transitions. Word has length 164 [2021-12-17 18:46:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:25,050 INFO L470 AbstractCegarLoop]: Abstraction has 36946 states and 57134 transitions. [2021-12-17 18:46:25,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 18:46:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 36946 states and 57134 transitions. [2021-12-17 18:46:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 18:46:25,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:25,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:46:25,124 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 18:46:25,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 18:46:25,322 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:25,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1727463715, now seen corresponding path program 1 times [2021-12-17 18:46:25,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:25,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970267239] [2021-12-17 18:46:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:25,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 18:46:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:46:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 18:46:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:46:25,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:25,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970267239] [2021-12-17 18:46:25,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970267239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:46:25,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220232632] [2021-12-17 18:46:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:25,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:46:25,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:46:25,443 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 18:46:25,448 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 18:46:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:25,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:46:25,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:46:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 18:46:25,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:46:25,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220232632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:25,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:46:25,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:46:25,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691942432] [2021-12-17 18:46:25,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:25,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:46:25,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:25,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:46:25,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:46:25,779 INFO L87 Difference]: Start difference. First operand 36946 states and 57134 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 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 18:46:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:28,022 INFO L93 Difference]: Finished difference Result 105587 states and 163172 transitions. [2021-12-17 18:46:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:46:28,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 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 164 [2021-12-17 18:46:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:28,200 INFO L225 Difference]: With dead ends: 105587 [2021-12-17 18:46:28,201 INFO L226 Difference]: Without dead ends: 70776 [2021-12-17 18:46:28,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 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 18:46:28,271 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4202 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 4545 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 18:46:28,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4202 Valid, 4545 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:46:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70776 states. [2021-12-17 18:46:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70776 to 70382. [2021-12-17 18:46:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70382 states, 62760 states have (on average 1.5031708094327598) internal successors, (94339), 63278 states have internal predecessors, (94339), 4884 states have call successors, (4884), 2352 states have call predecessors, (4884), 2736 states have return successors, (8843), 4815 states have call predecessors, (8843), 4884 states have call successors, (8843) [2021-12-17 18:46:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70382 states to 70382 states and 108066 transitions. [2021-12-17 18:46:31,884 INFO L78 Accepts]: Start accepts. Automaton has 70382 states and 108066 transitions. Word has length 164 [2021-12-17 18:46:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:31,884 INFO L470 AbstractCegarLoop]: Abstraction has 70382 states and 108066 transitions. [2021-12-17 18:46:31,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 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 18:46:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 70382 states and 108066 transitions. [2021-12-17 18:46:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 18:46:32,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:32,246 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:46:32,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 18:46:32,459 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,SelfDestructingSolverStorable13 [2021-12-17 18:46:32,459 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1621685181, now seen corresponding path program 1 times [2021-12-17 18:46:32,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:32,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552606357] [2021-12-17 18:46:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:32,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 18:46:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:46:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 18:46:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:46:32,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:32,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552606357] [2021-12-17 18:46:32,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552606357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:46:32,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586205063] [2021-12-17 18:46:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:32,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:46:32,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:46:32,551 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 18:46:32,552 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 18:46:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:32,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:46:32,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:46:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 18:46:32,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:46:32,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586205063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:32,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:46:32,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:46:32,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142046011] [2021-12-17 18:46:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:32,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:46:32,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:46:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:46:32,929 INFO L87 Difference]: Start difference. First operand 70382 states and 108066 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 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 18:46:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:46:37,687 INFO L93 Difference]: Finished difference Result 204915 states and 315566 transitions. [2021-12-17 18:46:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:46:37,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 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 164 [2021-12-17 18:46:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:46:38,082 INFO L225 Difference]: With dead ends: 204915 [2021-12-17 18:46:38,082 INFO L226 Difference]: Without dead ends: 136668 [2021-12-17 18:46:38,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 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 18:46:38,214 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4190 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4190 SdHoareTripleChecker+Valid, 4545 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 18:46:38,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4190 Valid, 4545 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:46:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136668 states. [2021-12-17 18:46:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136668 to 135882. [2021-12-17 18:46:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135882 states, 121036 states have (on average 1.4968687002214218) internal successors, (181175), 122070 states have internal predecessors, (181175), 9372 states have call successors, (9372), 4704 states have call predecessors, (9372), 5472 states have return successors, (17227), 9171 states have call predecessors, (17227), 9372 states have call successors, (17227) [2021-12-17 18:46:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135882 states to 135882 states and 207774 transitions. [2021-12-17 18:46:44,219 INFO L78 Accepts]: Start accepts. Automaton has 135882 states and 207774 transitions. Word has length 164 [2021-12-17 18:46:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:46:44,229 INFO L470 AbstractCegarLoop]: Abstraction has 135882 states and 207774 transitions. [2021-12-17 18:46:44,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 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 18:46:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 135882 states and 207774 transitions. [2021-12-17 18:46:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 18:46:44,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:46:44,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:46:44,405 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 18:46:44,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:46:44,605 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:46:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:46:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2014758755, now seen corresponding path program 1 times [2021-12-17 18:46:44,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:46:44,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515636499] [2021-12-17 18:46:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:44,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:46:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:46:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 18:46:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 18:46:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 18:46:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 18:46:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 18:46:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:46:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 18:46:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:46:44,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:46:44,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515636499] [2021-12-17 18:46:44,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515636499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:46:44,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695275379] [2021-12-17 18:46:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:46:44,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:46:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:46:44,736 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 18:46:44,737 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 18:46:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:46:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:46:44,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:46:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 18:46:45,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:46:45,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695275379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:46:45,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:46:45,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:46:45,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779146357] [2021-12-17 18:46:45,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:46:45,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:46:45,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:46:45,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:46:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:46:45,053 INFO L87 Difference]: Start difference. First operand 135882 states and 207774 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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)