./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label49+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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_label49+token_ring.03.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 713a95fba13367522eddac239136ad149ef56d491623153a32513b25fa3198dd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:21:24,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:21:24,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:21:24,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:21:24,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:21:24,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:21:24,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:21:24,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:21:24,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:21:24,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:21:24,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:21:24,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:21:24,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:21:24,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:21:24,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:21:24,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:21:24,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:21:24,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:21:24,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:21:24,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:21:24,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:21:24,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:21:24,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:21:24,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:21:24,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:21:24,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:21:24,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:21:24,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:21:24,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:21:24,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:21:24,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:21:24,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:21:24,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:21:24,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:21:24,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:21:24,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:21:24,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:21:24,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:21:24,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:21:24,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:21:24,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:21:24,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:21:24,417 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:21:24,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:21:24,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:21:24,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:21:24,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:21:24,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:21:24,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:21:24,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:21:24,420 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:21:24,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:21:24,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:21:24,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:21:24,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:21:24,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:21:24,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:21:24,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:21:24,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:21:24,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:21:24,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:21:24,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:21:24,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:21:24,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:21:24,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:21:24,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:21:24,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:21:24,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:21:24,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:21:24,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:21:24,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:21:24,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:21:24,425 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:21:24,425 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:21:24,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:21:24,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:21:24,426 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 713a95fba13367522eddac239136ad149ef56d491623153a32513b25fa3198dd [2021-12-21 14:21:24,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:21:24,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:21:24,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:21:24,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:21:24,720 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:21:24,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label49+token_ring.03.cil-2.c [2021-12-21 14:21:24,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aab8a499/e6f4d204f9fc47aa97450f0115edb98c/FLAGb8e72f1f0 [2021-12-21 14:21:25,698 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:21:25,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label49+token_ring.03.cil-2.c [2021-12-21 14:21:25,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aab8a499/e6f4d204f9fc47aa97450f0115edb98c/FLAGb8e72f1f0 [2021-12-21 14:21:25,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aab8a499/e6f4d204f9fc47aa97450f0115edb98c [2021-12-21 14:21:25,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:21:25,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:21:25,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:21:25,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:21:25,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:21:25,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:21:25" (1/1) ... [2021-12-21 14:21:25,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dcab322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:25, skipping insertion in model container [2021-12-21 14:21:25,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:21:25" (1/1) ... [2021-12-21 14:21:25,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:21:26,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:21:27,561 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_label49+token_ring.03.cil-2.c[380593,380606] [2021-12-21 14:21:27,584 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_label49+token_ring.03.cil-2.c[383339,383352] [2021-12-21 14:21:27,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:21:27,737 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:21:28,497 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_label49+token_ring.03.cil-2.c[380593,380606] [2021-12-21 14:21:28,502 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_label49+token_ring.03.cil-2.c[383339,383352] [2021-12-21 14:21:28,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:21:28,602 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:21:28,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28 WrapperNode [2021-12-21 14:21:28,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:21:28,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:21:28,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:21:28,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:21:28,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:28,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:29,187 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-12-21 14:21:29,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:21:29,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:21:29,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:21:29,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:21:29,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:29,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:29,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:29,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:29,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:29,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:29,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:29,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:21:29,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:21:29,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:21:29,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:21:29,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (1/1) ... [2021-12-21 14:21:29,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:21:29,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:21:29,897 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) [2021-12-21 14:21:29,952 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 [2021-12-21 14:21:30,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:21:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-21 14:21:30,002 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-21 14:21:30,002 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:21:30,002 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:21:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-21 14:21:30,003 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-21 14:21:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-21 14:21:30,003 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-21 14:21:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-21 14:21:30,003 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-21 14:21:30,003 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-21 14:21:30,004 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-21 14:21:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:21:30,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:21:30,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:21:30,178 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:21:30,180 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:21:35,869 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:21:35,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:21:35,904 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-21 14:21:35,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:21:35 BoogieIcfgContainer [2021-12-21 14:21:35,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:21:35,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:21:35,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:21:35,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:21:35,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:21:25" (1/3) ... [2021-12-21 14:21:35,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3a69b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:21:35, skipping insertion in model container [2021-12-21 14:21:35,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:21:28" (2/3) ... [2021-12-21 14:21:35,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3a69b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:21:35, skipping insertion in model container [2021-12-21 14:21:35,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:21:35" (3/3) ... [2021-12-21 14:21:35,918 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.03.cil-2.c [2021-12-21 14:21:35,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:21:35,923 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:21:35,974 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:21:35,979 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 [2021-12-21 14:21:35,980 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:21:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-21 14:21:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:21:36,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:36,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:36,043 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-12-21 14:21:36,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:36,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520313314] [2021-12-21 14:21:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:36,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:36,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:36,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:36,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:36,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:21:36,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520313314] [2021-12-21 14:21:36,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520313314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:36,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:21:36,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:21:36,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465392997] [2021-12-21 14:21:36,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:36,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:21:36,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:21:36,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:21:36,542 INFO L87 Difference]: Start difference. First operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:37,552 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-12-21 14:21:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:21:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-21 14:21:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:37,588 INFO L225 Difference]: With dead ends: 4899 [2021-12-21 14:21:37,588 INFO L226 Difference]: Without dead ends: 2500 [2021-12-21 14:21:37,599 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 [2021-12-21 14:21:37,602 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:21:37,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:21:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-21 14:21:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-12-21 14:21:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8291859974694222) internal successors, (4337), 2374 states have internal predecessors, (4337), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-21 14:21:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-12-21 14:21:37,827 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-12-21 14:21:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:37,827 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-12-21 14:21:37,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-12-21 14:21:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:21:37,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:37,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:37,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:21:37,835 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:37,838 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-12-21 14:21:37,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:37,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048752367] [2021-12-21 14:21:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:37,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:37,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:37,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:37,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:37,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:37,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:21:37,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:37,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048752367] [2021-12-21 14:21:37,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048752367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:37,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:21:37,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:21:37,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639705574] [2021-12-21 14:21:37,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:37,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:21:37,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:21:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:21:37,960 INFO L87 Difference]: Start difference. First operand 2415 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:39,011 INFO L93 Difference]: Finished difference Result 2969 states and 5244 transitions. [2021-12-21 14:21:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:21:39,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-21 14:21:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:39,037 INFO L225 Difference]: With dead ends: 2969 [2021-12-21 14:21:39,038 INFO L226 Difference]: Without dead ends: 2686 [2021-12-21 14:21:39,040 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 [2021-12-21 14:21:39,044 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 4469 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20915 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:21:39,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20915 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:21:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-12-21 14:21:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2548. [2021-12-21 14:21:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2485 states have (on average 1.8132796780684104) internal successors, (4506), 2489 states have internal predecessors, (4506), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-21 14:21:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4593 transitions. [2021-12-21 14:21:39,117 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4593 transitions. Word has length 79 [2021-12-21 14:21:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:39,118 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4593 transitions. [2021-12-21 14:21:39,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4593 transitions. [2021-12-21 14:21:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:21:39,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:39,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:39,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:21:39,121 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-12-21 14:21:39,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:39,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138783441] [2021-12-21 14:21:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:39,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:39,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:39,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:39,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:39,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:39,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:21:39,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:39,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138783441] [2021-12-21 14:21:39,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138783441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:39,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:21:39,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:21:39,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952601914] [2021-12-21 14:21:39,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:39,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:21:39,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:21:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:21:39,308 INFO L87 Difference]: Start difference. First operand 2548 states and 4593 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:40,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:40,383 INFO L93 Difference]: Finished difference Result 3451 states and 5967 transitions. [2021-12-21 14:21:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:21:40,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-21 14:21:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:40,398 INFO L225 Difference]: With dead ends: 3451 [2021-12-21 14:21:40,399 INFO L226 Difference]: Without dead ends: 3035 [2021-12-21 14:21:40,406 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 [2021-12-21 14:21:40,409 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4466 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 20903 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:21:40,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 20903 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:21:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-12-21 14:21:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2815. [2021-12-21 14:21:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2714 states have (on average 1.7851879145173175) internal successors, (4845), 2720 states have internal predecessors, (4845), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-21 14:21:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 4988 transitions. [2021-12-21 14:21:40,499 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 4988 transitions. Word has length 79 [2021-12-21 14:21:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:40,501 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 4988 transitions. [2021-12-21 14:21:40,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 4988 transitions. [2021-12-21 14:21:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:21:40,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:40,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:40,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:21:40,506 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:40,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:40,506 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-12-21 14:21:40,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:40,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562947572] [2021-12-21 14:21:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:40,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:40,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:40,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:40,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:40,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:40,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:21:40,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562947572] [2021-12-21 14:21:40,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562947572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:40,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:21:40,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:21:40,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176345960] [2021-12-21 14:21:40,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:40,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:21:40,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:40,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:21:40,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:21:40,608 INFO L87 Difference]: Start difference. First operand 2815 states and 4988 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:41,701 INFO L93 Difference]: Finished difference Result 4382 states and 7362 transitions. [2021-12-21 14:21:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:21:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-21 14:21:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:41,718 INFO L225 Difference]: With dead ends: 4382 [2021-12-21 14:21:41,718 INFO L226 Difference]: Without dead ends: 3699 [2021-12-21 14:21:41,727 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 [2021-12-21 14:21:41,737 INFO L933 BasicCegarLoop]: 4308 mSDtfsCounter, 4462 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 20899 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:21:41,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4472 Valid, 20899 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:21:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-12-21 14:21:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3350. [2021-12-21 14:21:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7406240151276395) internal successors, (5523), 3183 states have internal predecessors, (5523), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-21 14:21:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5784 transitions. [2021-12-21 14:21:41,899 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5784 transitions. Word has length 79 [2021-12-21 14:21:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:41,900 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5784 transitions. [2021-12-21 14:21:41,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5784 transitions. [2021-12-21 14:21:41,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:21:41,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:41,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:41,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:21:41,903 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:41,904 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-12-21 14:21:41,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:41,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004613261] [2021-12-21 14:21:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:41,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:41,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:41,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:41,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:41,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:41,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:21:41,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:41,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004613261] [2021-12-21 14:21:41,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004613261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:41,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:21:41,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:21:41,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800510313] [2021-12-21 14:21:41,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:41,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:21:41,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:21:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:21:41,988 INFO L87 Difference]: Start difference. First operand 3350 states and 5784 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:43,093 INFO L93 Difference]: Finished difference Result 6651 states and 10762 transitions. [2021-12-21 14:21:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:21:43,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-21 14:21:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:43,118 INFO L225 Difference]: With dead ends: 6651 [2021-12-21 14:21:43,119 INFO L226 Difference]: Without dead ends: 5433 [2021-12-21 14:21:43,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:21:43,127 INFO L933 BasicCegarLoop]: 4302 mSDtfsCounter, 4593 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4607 SdHoareTripleChecker+Valid, 20885 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:21:43,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4607 Valid, 20885 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:21:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2021-12-21 14:21:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 4401. [2021-12-21 14:21:43,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 4080 states have (on average 1.683578431372549) internal successors, (6869), 4098 states have internal predecessors, (6869), 201 states have call successors, (201), 102 states have call predecessors, (201), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2021-12-21 14:21:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 7368 transitions. [2021-12-21 14:21:43,289 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 7368 transitions. Word has length 79 [2021-12-21 14:21:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:43,290 INFO L470 AbstractCegarLoop]: Abstraction has 4401 states and 7368 transitions. [2021-12-21 14:21:43,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 7368 transitions. [2021-12-21 14:21:43,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:21:43,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:43,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:43,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:21:43,294 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:43,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-12-21 14:21:43,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:43,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957412655] [2021-12-21 14:21:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:43,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:43,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:43,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:43,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:43,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:43,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:21:43,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:43,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957412655] [2021-12-21 14:21:43,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957412655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:43,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:21:43,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:21:43,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012287978] [2021-12-21 14:21:43,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:43,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:21:43,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:21:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:21:43,383 INFO L87 Difference]: Start difference. First operand 4401 states and 7368 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:44,679 INFO L93 Difference]: Finished difference Result 10516 states and 16624 transitions. [2021-12-21 14:21:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:21:44,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-21 14:21:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:44,722 INFO L225 Difference]: With dead ends: 10516 [2021-12-21 14:21:44,722 INFO L226 Difference]: Without dead ends: 8247 [2021-12-21 14:21:44,730 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 [2021-12-21 14:21:44,731 INFO L933 BasicCegarLoop]: 4339 mSDtfsCounter, 4479 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4488 SdHoareTripleChecker+Valid, 20919 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:21:44,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4488 Valid, 20919 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:21:44,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2021-12-21 14:21:44,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 6412. [2021-12-21 14:21:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6412 states, 5811 states have (on average 1.6236448115642748) internal successors, (9435), 5845 states have internal predecessors, (9435), 369 states have call successors, (369), 198 states have call predecessors, (369), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2021-12-21 14:21:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6412 states to 6412 states and 10448 transitions. [2021-12-21 14:21:44,996 INFO L78 Accepts]: Start accepts. Automaton has 6412 states and 10448 transitions. Word has length 79 [2021-12-21 14:21:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:44,997 INFO L470 AbstractCegarLoop]: Abstraction has 6412 states and 10448 transitions. [2021-12-21 14:21:44,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6412 states and 10448 transitions. [2021-12-21 14:21:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:21:45,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:45,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:45,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:21:45,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:45,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-12-21 14:21:45,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:45,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610630775] [2021-12-21 14:21:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:45,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:45,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:45,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:45,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:45,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:45,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:21:45,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:45,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610630775] [2021-12-21 14:21:45,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610630775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:45,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:21:45,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:21:45,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217204715] [2021-12-21 14:21:45,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:45,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:21:45,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:21:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:21:45,105 INFO L87 Difference]: Start difference. First operand 6412 states and 10448 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:46,334 INFO L93 Difference]: Finished difference Result 17230 states and 26990 transitions. [2021-12-21 14:21:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:21:46,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-21 14:21:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:46,396 INFO L225 Difference]: With dead ends: 17230 [2021-12-21 14:21:46,396 INFO L226 Difference]: Without dead ends: 12950 [2021-12-21 14:21:46,415 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 [2021-12-21 14:21:46,416 INFO L933 BasicCegarLoop]: 4289 mSDtfsCounter, 4470 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4484 SdHoareTripleChecker+Valid, 20872 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:21:46,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4484 Valid, 20872 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:21:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12950 states. [2021-12-21 14:21:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12950 to 10528. [2021-12-21 14:21:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10528 states, 9383 states have (on average 1.5742299904081851) internal successors, (14771), 9449 states have internal predecessors, (14771), 689 states have call successors, (689), 390 states have call predecessors, (689), 454 states have return successors, (1482), 752 states have call predecessors, (1482), 689 states have call successors, (1482) [2021-12-21 14:21:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10528 states to 10528 states and 16942 transitions. [2021-12-21 14:21:47,055 INFO L78 Accepts]: Start accepts. Automaton has 10528 states and 16942 transitions. Word has length 79 [2021-12-21 14:21:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:47,057 INFO L470 AbstractCegarLoop]: Abstraction has 10528 states and 16942 transitions. [2021-12-21 14:21:47,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 10528 states and 16942 transitions. [2021-12-21 14:21:47,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 14:21:47,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:47,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:47,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:21:47,066 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:47,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-12-21 14:21:47,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:47,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534163295] [2021-12-21 14:21:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:47,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:47,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:47,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:47,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:47,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:47,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:21:47,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:47,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534163295] [2021-12-21 14:21:47,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534163295] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:47,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:21:47,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:21:47,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246362103] [2021-12-21 14:21:47,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:47,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:21:47,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:21:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:21:47,162 INFO L87 Difference]: Start difference. First operand 10528 states and 16942 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:48,503 INFO L93 Difference]: Finished difference Result 25979 states and 40698 transitions. [2021-12-21 14:21:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:21:48,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-21 14:21:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:48,657 INFO L225 Difference]: With dead ends: 25979 [2021-12-21 14:21:48,657 INFO L226 Difference]: Without dead ends: 17584 [2021-12-21 14:21:48,685 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 [2021-12-21 14:21:48,686 INFO L933 BasicCegarLoop]: 4388 mSDtfsCounter, 4630 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4657 SdHoareTripleChecker+Valid, 16733 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:21:48,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4657 Valid, 16733 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:21:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17584 states. [2021-12-21 14:21:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17584 to 14721. [2021-12-21 14:21:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14721 states, 12981 states have (on average 1.5384793159232726) internal successors, (19971), 13112 states have internal predecessors, (19971), 1054 states have call successors, (1054), 588 states have call predecessors, (1054), 684 states have return successors, (2091), 1084 states have call predecessors, (2091), 1054 states have call successors, (2091) [2021-12-21 14:21:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14721 states to 14721 states and 23116 transitions. [2021-12-21 14:21:49,335 INFO L78 Accepts]: Start accepts. Automaton has 14721 states and 23116 transitions. Word has length 79 [2021-12-21 14:21:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:49,335 INFO L470 AbstractCegarLoop]: Abstraction has 14721 states and 23116 transitions. [2021-12-21 14:21:49,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:21:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 14721 states and 23116 transitions. [2021-12-21 14:21:49,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 14:21:49,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:49,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:49,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:21:49,372 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-12-21 14:21:49,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:49,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069515750] [2021-12-21 14:21:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:49,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:21:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:21:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:21:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:21:49,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:49,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069515750] [2021-12-21 14:21:49,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069515750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:21:49,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969286383] [2021-12-21 14:21:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:49,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:21:49,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:21:49,507 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) [2021-12-21 14:21:49,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:21:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:49,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:21:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:21:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 14:21:49,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:21:49,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969286383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:49,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:21:49,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:21:49,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698281179] [2021-12-21 14:21:49,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:49,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:21:49,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:21:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:21:49,852 INFO L87 Difference]: Start difference. First operand 14721 states and 23116 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:21:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:51,115 INFO L93 Difference]: Finished difference Result 39550 states and 61248 transitions. [2021-12-21 14:21:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:21:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-21 14:21:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:51,199 INFO L225 Difference]: With dead ends: 39550 [2021-12-21 14:21:51,200 INFO L226 Difference]: Without dead ends: 26962 [2021-12-21 14:21:51,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:21:51,240 INFO L933 BasicCegarLoop]: 4192 mSDtfsCounter, 4136 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4136 SdHoareTripleChecker+Valid, 4390 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 [2021-12-21 14:21:51,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4136 Valid, 4390 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:21:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26962 states. [2021-12-21 14:21:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26962 to 26764. [2021-12-21 14:21:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26764 states, 23340 states have (on average 1.5074550128534705) internal successors, (35184), 23600 states have internal predecessors, (35184), 2054 states have call successors, (2054), 1176 states have call predecessors, (2054), 1368 states have return successors, (4065), 2051 states have call predecessors, (4065), 2054 states have call successors, (4065) [2021-12-21 14:21:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26764 states to 26764 states and 41303 transitions. [2021-12-21 14:21:52,367 INFO L78 Accepts]: Start accepts. Automaton has 26764 states and 41303 transitions. Word has length 128 [2021-12-21 14:21:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:52,368 INFO L470 AbstractCegarLoop]: Abstraction has 26764 states and 41303 transitions. [2021-12-21 14:21:52,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:21:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 26764 states and 41303 transitions. [2021-12-21 14:21:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 14:21:52,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:52,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:52,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:21:52,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:21:52,644 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-12-21 14:21:52,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:52,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560362086] [2021-12-21 14:21:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:52,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:21:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:21:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:21:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:21:52,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:52,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560362086] [2021-12-21 14:21:52,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560362086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:21:52,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296255220] [2021-12-21 14:21:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:52,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:21:52,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:21:52,798 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) [2021-12-21 14:21:52,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:21:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:52,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:21:52,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:21:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 14:21:53,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:21:53,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296255220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:53,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:21:53,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:21:53,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6556437] [2021-12-21 14:21:53,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:53,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:21:53,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:21:53,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:21:53,164 INFO L87 Difference]: Start difference. First operand 26764 states and 41303 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:21:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:21:54,810 INFO L93 Difference]: Finished difference Result 75333 states and 115677 transitions. [2021-12-21 14:21:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:21:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-21 14:21:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:21:55,040 INFO L225 Difference]: With dead ends: 75333 [2021-12-21 14:21:55,040 INFO L226 Difference]: Without dead ends: 50702 [2021-12-21 14:21:55,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:21:55,115 INFO L933 BasicCegarLoop]: 4192 mSDtfsCounter, 4130 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4130 SdHoareTripleChecker+Valid, 4390 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 [2021-12-21 14:21:55,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4130 Valid, 4390 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:21:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50702 states. [2021-12-21 14:21:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50702 to 50308. [2021-12-21 14:21:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50308 states, 43566 states have (on average 1.4879493182757195) internal successors, (64824), 44084 states have internal predecessors, (64824), 4004 states have call successors, (4004), 2352 states have call predecessors, (4004), 2736 states have return successors, (7963), 3935 states have call predecessors, (7963), 4004 states have call successors, (7963) [2021-12-21 14:21:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50308 states to 50308 states and 76791 transitions. [2021-12-21 14:21:57,537 INFO L78 Accepts]: Start accepts. Automaton has 50308 states and 76791 transitions. Word has length 128 [2021-12-21 14:21:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:21:57,537 INFO L470 AbstractCegarLoop]: Abstraction has 50308 states and 76791 transitions. [2021-12-21 14:21:57,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:21:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 50308 states and 76791 transitions. [2021-12-21 14:21:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 14:21:57,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:21:57,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:21:57,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:21:58,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 14:21:58,093 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:21:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:21:58,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-12-21 14:21:58,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:21:58,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059913259] [2021-12-21 14:21:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:58,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:21:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:21:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:21:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:21:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:21:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:21:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:21:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:21:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 14:21:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 14:21:58,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:21:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059913259] [2021-12-21 14:21:58,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059913259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:21:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360414394] [2021-12-21 14:21:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:21:58,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:21:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:21:58,227 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) [2021-12-21 14:21:58,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:21:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:21:58,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:21:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:21:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 14:21:58,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:21:58,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360414394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:21:58,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:21:58,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-21 14:21:58,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336286663] [2021-12-21 14:21:58,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:21:58,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:21:58,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:21:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:21:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:21:58,515 INFO L87 Difference]: Start difference. First operand 50308 states and 76791 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 14:22:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:22:01,427 INFO L93 Difference]: Finished difference Result 144685 states and 222029 transitions. [2021-12-21 14:22:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:22:01,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2021-12-21 14:22:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:22:01,910 INFO L225 Difference]: With dead ends: 144685 [2021-12-21 14:22:01,910 INFO L226 Difference]: Without dead ends: 96511 [2021-12-21 14:22:02,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:22:02,034 INFO L933 BasicCegarLoop]: 4382 mSDtfsCounter, 194 mSDsluCounter, 4180 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 8562 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:22:02,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 8562 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:22:02,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96511 states. [2021-12-21 14:22:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96511 to 96511. [2021-12-21 14:22:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96511 states, 83294 states have (on average 1.4710663433140443) internal successors, (122531), 84197 states have internal predecessors, (122531), 7743 states have call successors, (7743), 4704 states have call predecessors, (7743), 5472 states have return successors, (17046), 7737 states have call predecessors, (17046), 7743 states have call successors, (17046) [2021-12-21 14:22:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96511 states to 96511 states and 147320 transitions. [2021-12-21 14:22:06,926 INFO L78 Accepts]: Start accepts. Automaton has 96511 states and 147320 transitions. Word has length 128 [2021-12-21 14:22:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:22:06,927 INFO L470 AbstractCegarLoop]: Abstraction has 96511 states and 147320 transitions. [2021-12-21 14:22:06,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 14:22:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand 96511 states and 147320 transitions. [2021-12-21 14:22:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 14:22:07,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:22:07,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:22:07,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:22:07,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:22:07,439 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:22:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:22:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-12-21 14:22:07,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:22:07,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699788598] [2021-12-21 14:22:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:22:07,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:22:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:22:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 14:22:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:22:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 14:22:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 14:22:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:22:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:22:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 14:22:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-21 14:22:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-21 14:22:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 14:22:07,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:22:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699788598] [2021-12-21 14:22:07,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699788598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:22:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447445646] [2021-12-21 14:22:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:22:07,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:22:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:22:07,747 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) [2021-12-21 14:22:07,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:22:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:22:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:22:07,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:22:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 14:22:08,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:22:08,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447445646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:22:08,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:22:08,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-21 14:22:08,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601233589] [2021-12-21 14:22:08,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:22:08,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:22:08,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:22:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:22:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:22:08,196 INFO L87 Difference]: Start difference. First operand 96511 states and 147320 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 14:22:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:22:15,207 INFO L93 Difference]: Finished difference Result 280463 states and 429619 transitions. [2021-12-21 14:22:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:22:15,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-12-21 14:22:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted.