./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label49+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label49+token_ring.03.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45212159197fe0bc553796025c4b5584a047c150b6d840572b407bf4bd1f9446 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 19:05:37,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 19:05:37,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 19:05:37,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 19:05:37,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 19:05:37,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 19:05:37,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 19:05:37,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 19:05:37,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 19:05:37,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 19:05:37,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 19:05:37,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 19:05:37,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 19:05:37,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 19:05:37,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 19:05:37,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 19:05:37,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 19:05:37,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 19:05:37,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 19:05:37,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 19:05:37,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 19:05:37,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 19:05:37,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 19:05:37,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 19:05:37,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 19:05:37,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 19:05:37,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 19:05:37,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 19:05:37,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 19:05:37,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 19:05:37,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 19:05:37,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 19:05:37,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 19:05:37,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 19:05:37,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 19:05:37,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 19:05:37,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 19:05:37,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 19:05:37,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 19:05:37,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 19:05:37,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 19:05:37,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 19:05:37,681 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 19:05:37,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 19:05:37,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 19:05:37,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 19:05:37,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 19:05:37,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 19:05:37,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 19:05:37,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 19:05:37,689 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 19:05:37,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 19:05:37,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 19:05:37,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 19:05:37,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 19:05:37,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 19:05:37,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 19:05:37,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 19:05:37,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 19:05:37,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 19:05:37,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 19:05:37,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 19:05:37,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 19:05:37,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 19:05:37,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 19:05:37,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 19:05:37,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:05:37,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 19:05:37,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 19:05:37,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 19:05:37,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 19:05:37,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 19:05:37,693 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 19:05:37,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 19:05:37,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 19:05:37,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 19:05:37,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45212159197fe0bc553796025c4b5584a047c150b6d840572b407bf4bd1f9446 [2021-12-17 19:05:37,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 19:05:37,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 19:05:37,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 19:05:37,904 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 19:05:37,905 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 19:05:37,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label49+token_ring.03.cil-1.c [2021-12-17 19:05:37,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf5319de/702e9f2f93f343569112352c2bc9c35c/FLAGeec300b75 [2021-12-17 19:05:38,651 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 19:05:38,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label49+token_ring.03.cil-1.c [2021-12-17 19:05:38,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf5319de/702e9f2f93f343569112352c2bc9c35c/FLAGeec300b75 [2021-12-17 19:05:38,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cf5319de/702e9f2f93f343569112352c2bc9c35c [2021-12-17 19:05:38,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 19:05:38,943 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 19:05:38,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 19:05:38,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 19:05:38,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 19:05:38,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:05:38" (1/1) ... [2021-12-17 19:05:38,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d520e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:38, skipping insertion in model container [2021-12-17 19:05:38,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:05:38" (1/1) ... [2021-12-17 19:05:38,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 19:05:39,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 19:05:40,369 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-1.c[380593,380606] [2021-12-17 19:05:40,389 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-1.c[383339,383352] [2021-12-17 19:05:40,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:05:40,542 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 19:05:41,262 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-1.c[380593,380606] [2021-12-17 19:05:41,266 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-1.c[383339,383352] [2021-12-17 19:05:41,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 19:05:41,321 INFO L208 MainTranslator]: Completed translation [2021-12-17 19:05:41,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41 WrapperNode [2021-12-17 19:05:41,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 19:05:41,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 19:05:41,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 19:05:41,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 19:05:41,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:41,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:41,735 INFO L137 Inliner]: procedures = 50, calls = 51, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 12682 [2021-12-17 19:05:41,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 19:05:41,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 19:05:41,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 19:05:41,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 19:05:41,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:41,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:41,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:41,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:41,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:42,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:42,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:42,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 19:05:42,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 19:05:42,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 19:05:42,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 19:05:42,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (1/1) ... [2021-12-17 19:05:42,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 19:05:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:05:42,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 19:05:42,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 19:05:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 19:05:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 19:05:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 19:05:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 19:05:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 19:05:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 19:05:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 19:05:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-17 19:05:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-17 19:05:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 19:05:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 19:05:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 19:05:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 19:05:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 19:05:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 19:05:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 19:05:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 19:05:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 19:05:42,405 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 19:05:42,406 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 19:05:47,036 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 19:05:47,053 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 19:05:47,054 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-17 19:05:47,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:05:47 BoogieIcfgContainer [2021-12-17 19:05:47,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 19:05:47,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 19:05:47,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 19:05:47,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 19:05:47,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:05:38" (1/3) ... [2021-12-17 19:05:47,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12924e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:05:47, skipping insertion in model container [2021-12-17 19:05:47,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:05:41" (2/3) ... [2021-12-17 19:05:47,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12924e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:05:47, skipping insertion in model container [2021-12-17 19:05:47,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:05:47" (3/3) ... [2021-12-17 19:05:47,069 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.03.cil-1.c [2021-12-17 19:05:47,073 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 19:05:47,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 19:05:47,113 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 19:05:47,118 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 19:05:47,118 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 19:05:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 2348 states, 2319 states have (on average 1.8559724018973696) internal successors, (4304), 2324 states have internal predecessors, (4304), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 19:05:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 19:05:47,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:47,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:05:47,169 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:47,173 INFO L85 PathProgramCache]: Analyzing trace with hash 520182233, now seen corresponding path program 1 times [2021-12-17 19:05:47,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:47,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238247063] [2021-12-17 19:05:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:47,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:47,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:47,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:47,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:47,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:47,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:05:47,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:47,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238247063] [2021-12-17 19:05:47,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238247063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:47,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:05:47,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:05:47,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709179727] [2021-12-17 19:05:47,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:47,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:05:47,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:47,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:05:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:05:47,469 INFO L87 Difference]: Start difference. First operand has 2348 states, 2319 states have (on average 1.8559724018973696) internal successors, (4304), 2324 states have internal predecessors, (4304), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:48,337 INFO L93 Difference]: Finished difference Result 4921 states and 9054 transitions. [2021-12-17 19:05:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:05:48,339 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2021-12-17 19:05:48,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:48,365 INFO L225 Difference]: With dead ends: 4921 [2021-12-17 19:05:48,365 INFO L226 Difference]: Without dead ends: 2514 [2021-12-17 19:05:48,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:05:48,376 INFO L933 BasicCegarLoop]: 4299 mSDtfsCounter, 4559 mSDsluCounter, 12541 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4569 SdHoareTripleChecker+Valid, 16840 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:48,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4569 Valid, 16840 Invalid, 759 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [88 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 19:05:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-12-17 19:05:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2427. [2021-12-17 19:05:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2381 states have (on average 1.8299034019319613) internal successors, (4357), 2385 states have internal predecessors, (4357), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-17 19:05:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 4420 transitions. [2021-12-17 19:05:48,480 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 4420 transitions. Word has length 80 [2021-12-17 19:05:48,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:48,480 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 4420 transitions. [2021-12-17 19:05:48,480 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 4420 transitions. [2021-12-17 19:05:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 19:05:48,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:48,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:05:48,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 19:05:48,483 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:48,489 INFO L85 PathProgramCache]: Analyzing trace with hash -721258283, now seen corresponding path program 1 times [2021-12-17 19:05:48,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:48,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149963724] [2021-12-17 19:05:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:48,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:48,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:48,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:48,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:48,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:48,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:05:48,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:48,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149963724] [2021-12-17 19:05:48,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149963724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:48,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:05:48,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:05:48,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146619309] [2021-12-17 19:05:48,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:48,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:05:48,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:05:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:05:48,632 INFO L87 Difference]: Start difference. First operand 2427 states and 4420 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:49,446 INFO L93 Difference]: Finished difference Result 3000 states and 5300 transitions. [2021-12-17 19:05:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:05:49,446 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2021-12-17 19:05:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:49,457 INFO L225 Difference]: With dead ends: 3000 [2021-12-17 19:05:49,457 INFO L226 Difference]: Without dead ends: 2705 [2021-12-17 19:05:49,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:05:49,464 INFO L933 BasicCegarLoop]: 4344 mSDtfsCounter, 4483 mSDsluCounter, 16678 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4493 SdHoareTripleChecker+Valid, 21022 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:49,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4493 Valid, 21022 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 19:05:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-12-17 19:05:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2565. [2021-12-17 19:05:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2500 states have (on average 1.8144) internal successors, (4536), 2505 states have internal predecessors, (4536), 43 states have call successors, (43), 19 states have call predecessors, (43), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-17 19:05:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4625 transitions. [2021-12-17 19:05:49,530 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4625 transitions. Word has length 80 [2021-12-17 19:05:49,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:49,530 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 4625 transitions. [2021-12-17 19:05:49,531 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:49,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4625 transitions. [2021-12-17 19:05:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 19:05:49,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:49,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:05:49,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 19:05:49,537 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:49,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1887529175, now seen corresponding path program 1 times [2021-12-17 19:05:49,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:49,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794213001] [2021-12-17 19:05:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:49,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:49,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:49,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:49,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:49,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:49,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:05:49,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:49,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794213001] [2021-12-17 19:05:49,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794213001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:49,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:05:49,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:05:49,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893146511] [2021-12-17 19:05:49,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:49,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:05:49,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:49,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:05:49,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:05:49,663 INFO L87 Difference]: Start difference. First operand 2565 states and 4625 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:50,566 INFO L93 Difference]: Finished difference Result 3497 states and 6053 transitions. [2021-12-17 19:05:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:05:50,567 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2021-12-17 19:05:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:50,577 INFO L225 Difference]: With dead ends: 3497 [2021-12-17 19:05:50,577 INFO L226 Difference]: Without dead ends: 3064 [2021-12-17 19:05:50,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:05:50,586 INFO L933 BasicCegarLoop]: 4336 mSDtfsCounter, 4480 mSDsluCounter, 16674 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4490 SdHoareTripleChecker+Valid, 21010 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:50,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4490 Valid, 21010 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 19:05:50,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-12-17 19:05:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2842. [2021-12-17 19:05:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2739 states have (on average 1.78714859437751) internal successors, (4895), 2746 states have internal predecessors, (4895), 67 states have call successors, (67), 31 states have call predecessors, (67), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-17 19:05:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 5040 transitions. [2021-12-17 19:05:50,663 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 5040 transitions. Word has length 80 [2021-12-17 19:05:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:50,665 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 5040 transitions. [2021-12-17 19:05:50,665 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 5040 transitions. [2021-12-17 19:05:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 19:05:50,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:50,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:05:50,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 19:05:50,668 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:50,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1833136277, now seen corresponding path program 1 times [2021-12-17 19:05:50,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:50,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550463733] [2021-12-17 19:05:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:50,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:50,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:50,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:50,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:50,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:50,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:05:50,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:50,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550463733] [2021-12-17 19:05:50,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550463733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:50,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:05:50,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:05:50,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582597762] [2021-12-17 19:05:50,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:50,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:05:50,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:05:50,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:05:50,769 INFO L87 Difference]: Start difference. First operand 2842 states and 5040 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:51,726 INFO L93 Difference]: Finished difference Result 4458 states and 7508 transitions. [2021-12-17 19:05:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 19:05:51,727 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2021-12-17 19:05:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:51,742 INFO L225 Difference]: With dead ends: 4458 [2021-12-17 19:05:51,744 INFO L226 Difference]: Without dead ends: 3748 [2021-12-17 19:05:51,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 19:05:51,754 INFO L933 BasicCegarLoop]: 4332 mSDtfsCounter, 4476 mSDsluCounter, 16674 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4486 SdHoareTripleChecker+Valid, 21006 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:51,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4486 Valid, 21006 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 19:05:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-12-17 19:05:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3397. [2021-12-17 19:05:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3218 states have (on average 1.7442510876320696) internal successors, (5613), 3229 states have internal predecessors, (5613), 115 states have call successors, (115), 55 states have call predecessors, (115), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 19:05:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5876 transitions. [2021-12-17 19:05:51,863 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5876 transitions. Word has length 80 [2021-12-17 19:05:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:51,868 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 5876 transitions. [2021-12-17 19:05:51,868 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:51,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5876 transitions. [2021-12-17 19:05:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 19:05:51,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:51,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:05:51,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 19:05:51,870 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:51,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1415739671, now seen corresponding path program 1 times [2021-12-17 19:05:51,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:51,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066552409] [2021-12-17 19:05:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:51,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:51,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:51,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:51,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:51,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:51,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:05:51,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:51,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066552409] [2021-12-17 19:05:51,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066552409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:51,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:05:51,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:05:51,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128049596] [2021-12-17 19:05:51,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:51,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:05:51,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:51,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:05:51,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:05:51,970 INFO L87 Difference]: Start difference. First operand 3397 states and 5876 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:52,386 INFO L93 Difference]: Finished difference Result 5008 states and 8361 transitions. [2021-12-17 19:05:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 19:05:52,386 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2021-12-17 19:05:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:52,399 INFO L225 Difference]: With dead ends: 5008 [2021-12-17 19:05:52,399 INFO L226 Difference]: Without dead ends: 3743 [2021-12-17 19:05:52,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 19:05:52,404 INFO L933 BasicCegarLoop]: 4181 mSDtfsCounter, 4411 mSDsluCounter, 12180 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4422 SdHoareTripleChecker+Valid, 16361 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:52,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4422 Valid, 16361 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 19:05:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-12-17 19:05:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3397. [2021-12-17 19:05:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3218 states have (on average 1.7414543194530765) internal successors, (5604), 3229 states have internal predecessors, (5604), 115 states have call successors, (115), 55 states have call predecessors, (115), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 19:05:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5867 transitions. [2021-12-17 19:05:52,486 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5867 transitions. Word has length 80 [2021-12-17 19:05:52,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:52,486 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 5867 transitions. [2021-12-17 19:05:52,486 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5867 transitions. [2021-12-17 19:05:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 19:05:52,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:52,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:05:52,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 19:05:52,488 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:52,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2095011925, now seen corresponding path program 1 times [2021-12-17 19:05:52,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:52,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216166189] [2021-12-17 19:05:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:52,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:52,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:52,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:52,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:05:52,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:52,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216166189] [2021-12-17 19:05:52,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216166189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:52,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:05:52,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:05:52,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901464588] [2021-12-17 19:05:52,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:52,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:05:52,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:05:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:05:52,570 INFO L87 Difference]: Start difference. First operand 3397 states and 5867 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:53,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:53,492 INFO L93 Difference]: Finished difference Result 6680 states and 10828 transitions. [2021-12-17 19:05:53,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:05:53,492 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2021-12-17 19:05:53,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:53,513 INFO L225 Difference]: With dead ends: 6680 [2021-12-17 19:05:53,514 INFO L226 Difference]: Without dead ends: 5415 [2021-12-17 19:05:53,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 19:05:53,520 INFO L933 BasicCegarLoop]: 4361 mSDtfsCounter, 4489 mSDsluCounter, 16663 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 21024 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:53,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4498 Valid, 21024 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 19:05:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5415 states. [2021-12-17 19:05:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5415 to 4416. [2021-12-17 19:05:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4416 states, 4093 states have (on average 1.6826288785731738) internal successors, (6887), 4112 states have internal predecessors, (6887), 203 states have call successors, (203), 103 states have call predecessors, (203), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2021-12-17 19:05:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4416 states to 4416 states and 7388 transitions. [2021-12-17 19:05:53,642 INFO L78 Accepts]: Start accepts. Automaton has 4416 states and 7388 transitions. Word has length 80 [2021-12-17 19:05:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:53,643 INFO L470 AbstractCegarLoop]: Abstraction has 4416 states and 7388 transitions. [2021-12-17 19:05:53,643 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4416 states and 7388 transitions. [2021-12-17 19:05:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 19:05:53,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:53,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:05:53,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 19:05:53,646 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:53,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash -238380713, now seen corresponding path program 1 times [2021-12-17 19:05:53,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:53,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482333835] [2021-12-17 19:05:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:53,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:53,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:53,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:53,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:53,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:53,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:05:53,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:53,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482333835] [2021-12-17 19:05:53,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482333835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:53,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:05:53,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 19:05:53,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12125047] [2021-12-17 19:05:53,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:53,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 19:05:53,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 19:05:53,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 19:05:53,718 INFO L87 Difference]: Start difference. First operand 4416 states and 7388 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:54,582 INFO L93 Difference]: Finished difference Result 10073 states and 15935 transitions. [2021-12-17 19:05:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 19:05:54,583 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2021-12-17 19:05:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:54,625 INFO L225 Difference]: With dead ends: 10073 [2021-12-17 19:05:54,625 INFO L226 Difference]: Without dead ends: 7789 [2021-12-17 19:05:54,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 19:05:54,635 INFO L933 BasicCegarLoop]: 4311 mSDtfsCounter, 4480 mSDsluCounter, 16666 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4494 SdHoareTripleChecker+Valid, 20977 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:54,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4494 Valid, 20977 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 19:05:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7789 states. [2021-12-17 19:05:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7789 to 6539. [2021-12-17 19:05:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 5936 states have (on average 1.6224730458221024) internal successors, (9631), 5971 states have internal predecessors, (9631), 371 states have call successors, (371), 199 states have call predecessors, (371), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2021-12-17 19:05:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 10646 transitions. [2021-12-17 19:05:54,942 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 10646 transitions. Word has length 80 [2021-12-17 19:05:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:54,944 INFO L470 AbstractCegarLoop]: Abstraction has 6539 states and 10646 transitions. [2021-12-17 19:05:54,944 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 10646 transitions. [2021-12-17 19:05:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 19:05:54,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:54,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:05:54,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 19:05:54,948 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:54,949 INFO L85 PathProgramCache]: Analyzing trace with hash 322319065, now seen corresponding path program 1 times [2021-12-17 19:05:54,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:54,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882929606] [2021-12-17 19:05:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:54,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:54,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:54,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:54,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:55,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:55,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 19:05:55,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882929606] [2021-12-17 19:05:55,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882929606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:55,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 19:05:55,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 19:05:55,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168072025] [2021-12-17 19:05:55,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:55,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 19:05:55,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 19:05:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 19:05:55,025 INFO L87 Difference]: Start difference. First operand 6539 states and 10646 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:55,941 INFO L93 Difference]: Finished difference Result 14625 states and 22920 transitions. [2021-12-17 19:05:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 19:05:55,941 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2021-12-17 19:05:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:55,973 INFO L225 Difference]: With dead ends: 14625 [2021-12-17 19:05:55,974 INFO L226 Difference]: Without dead ends: 10219 [2021-12-17 19:05:55,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 19:05:55,991 INFO L933 BasicCegarLoop]: 4398 mSDtfsCounter, 4640 mSDsluCounter, 12372 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4667 SdHoareTripleChecker+Valid, 16770 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:55,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4667 Valid, 16770 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 19:05:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10219 states. [2021-12-17 19:05:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10219 to 8729. [2021-12-17 19:05:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8729 states, 7811 states have (on average 1.5773908590449366) internal successors, (12321), 7879 states have internal predecessors, (12321), 568 states have call successors, (568), 301 states have call predecessors, (568), 348 states have return successors, (923), 580 states have call predecessors, (923), 566 states have call successors, (923) [2021-12-17 19:05:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8729 states to 8729 states and 13812 transitions. [2021-12-17 19:05:56,299 INFO L78 Accepts]: Start accepts. Automaton has 8729 states and 13812 transitions. Word has length 80 [2021-12-17 19:05:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:56,300 INFO L470 AbstractCegarLoop]: Abstraction has 8729 states and 13812 transitions. [2021-12-17 19:05:56,300 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 19:05:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 8729 states and 13812 transitions. [2021-12-17 19:05:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 19:05:56,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:56,315 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, 1] [2021-12-17 19:05:56,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 19:05:56,316 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2072406432, now seen corresponding path program 1 times [2021-12-17 19:05:56,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:56,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41293263] [2021-12-17 19:05:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:56,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 19:05:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:05:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 19:05:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:05:56,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:56,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41293263] [2021-12-17 19:05:56,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41293263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:05:56,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049965779] [2021-12-17 19:05:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:56,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:05:56,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:05:56,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:05:56,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 19:05:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:56,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:05:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:05:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 19:05:56,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:05:56,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049965779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:56,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:05:56,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:05:56,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454141009] [2021-12-17 19:05:56,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:56,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:05:56,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:56,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:05:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:05:56,757 INFO L87 Difference]: Start difference. First operand 8729 states and 13812 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:05:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:57,063 INFO L93 Difference]: Finished difference Result 21742 states and 33432 transitions. [2021-12-17 19:05:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:05:57,064 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2021-12-17 19:05:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:57,108 INFO L225 Difference]: With dead ends: 21742 [2021-12-17 19:05:57,109 INFO L226 Difference]: Without dead ends: 15146 [2021-12-17 19:05:57,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:05:57,136 INFO L933 BasicCegarLoop]: 4203 mSDtfsCounter, 4147 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4147 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:57,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4147 Valid, 4412 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:05:57,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15146 states. [2021-12-17 19:05:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15146 to 15042. [2021-12-17 19:05:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15042 states, 13240 states have (on average 1.5308157099697886) internal successors, (20268), 13373 states have internal predecessors, (20268), 1104 states have call successors, (1104), 601 states have call predecessors, (1104), 696 states have return successors, (1785), 1099 states have call predecessors, (1785), 1102 states have call successors, (1785) [2021-12-17 19:05:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 23157 transitions. [2021-12-17 19:05:57,581 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 23157 transitions. Word has length 129 [2021-12-17 19:05:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:57,581 INFO L470 AbstractCegarLoop]: Abstraction has 15042 states and 23157 transitions. [2021-12-17 19:05:57,582 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:05:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 23157 transitions. [2021-12-17 19:05:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 19:05:57,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:05:57,605 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, 1] [2021-12-17 19:05:57,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 19:05:57,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:05:57,820 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:05:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:05:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -853257536, now seen corresponding path program 1 times [2021-12-17 19:05:57,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:05:57,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667227648] [2021-12-17 19:05:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:57,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:05:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:57,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:05:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:57,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:05:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:57,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:05:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:57,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:05:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:57,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:05:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:57,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 19:05:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:57,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:05:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:57,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 19:05:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:05:57,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:05:57,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667227648] [2021-12-17 19:05:57,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667227648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:05:57,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286738309] [2021-12-17 19:05:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:05:57,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:05:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:05:57,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:05:57,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 19:05:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:05:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:05:58,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:05:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 19:05:58,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:05:58,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286738309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:05:58,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:05:58,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:05:58,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478955158] [2021-12-17 19:05:58,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:05:58,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:05:58,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:05:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:05:58,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:05:58,216 INFO L87 Difference]: Start difference. First operand 15042 states and 23157 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:05:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:05:58,839 INFO L93 Difference]: Finished difference Result 40359 states and 61183 transitions. [2021-12-17 19:05:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:05:58,840 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2021-12-17 19:05:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:05:58,937 INFO L225 Difference]: With dead ends: 40359 [2021-12-17 19:05:58,937 INFO L226 Difference]: Without dead ends: 27450 [2021-12-17 19:05:58,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:05:58,983 INFO L933 BasicCegarLoop]: 4203 mSDtfsCounter, 4141 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:05:58,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4141 Valid, 4412 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:05:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27450 states. [2021-12-17 19:05:59,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27450 to 27246. [2021-12-17 19:05:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27246 states, 23750 states have (on average 1.501642105263158) internal successors, (35664), 24013 states have internal predecessors, (35664), 2102 states have call successors, (2102), 1201 states have call predecessors, (2102), 1392 states have return successors, (3435), 2063 states have call predecessors, (3435), 2100 states have call successors, (3435) [2021-12-17 19:05:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27246 states to 27246 states and 41201 transitions. [2021-12-17 19:05:59,997 INFO L78 Accepts]: Start accepts. Automaton has 27246 states and 41201 transitions. Word has length 129 [2021-12-17 19:05:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:05:59,998 INFO L470 AbstractCegarLoop]: Abstraction has 27246 states and 41201 transitions. [2021-12-17 19:05:59,998 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 19:05:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 27246 states and 41201 transitions. [2021-12-17 19:06:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-17 19:06:00,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:00,046 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, 1] [2021-12-17 19:06:00,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 19:06:00,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 19:06:00,259 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2127588384, now seen corresponding path program 1 times [2021-12-17 19:06:00,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:00,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680926716] [2021-12-17 19:06:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:00,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:06:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:06:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:06:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:06:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 19:06:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 19:06:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 19:06:00,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:00,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680926716] [2021-12-17 19:06:00,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680926716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:06:00,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797155480] [2021-12-17 19:06:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:00,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:00,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:06:00,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:06:00,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 19:06:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:06:00,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:06:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 19:06:00,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:06:00,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797155480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:00,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:06:00,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:06:00,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533321891] [2021-12-17 19:06:00,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:00,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:06:00,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:00,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:06:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:00,607 INFO L87 Difference]: Start difference. First operand 27246 states and 41201 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 19:06:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:01,875 INFO L93 Difference]: Finished difference Result 76117 states and 114817 transitions. [2021-12-17 19:06:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:06:01,876 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), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 129 [2021-12-17 19:06:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:02,113 INFO L225 Difference]: With dead ends: 76117 [2021-12-17 19:06:02,113 INFO L226 Difference]: Without dead ends: 51005 [2021-12-17 19:06:02,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:02,182 INFO L933 BasicCegarLoop]: 4392 mSDtfsCounter, 193 mSDsluCounter, 4191 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 8583 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:02,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 8583 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:06:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51005 states. [2021-12-17 19:06:03,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51005 to 51005. [2021-12-17 19:06:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51005 states, 44154 states have (on average 1.4736377225166464) internal successors, (65067), 44610 states have internal predecessors, (65067), 4065 states have call successors, (4065), 2401 states have call predecessors, (4065), 2784 states have return successors, (7494), 4057 states have call predecessors, (7494), 4063 states have call successors, (7494) [2021-12-17 19:06:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51005 states to 51005 states and 76626 transitions. [2021-12-17 19:06:04,197 INFO L78 Accepts]: Start accepts. Automaton has 51005 states and 76626 transitions. Word has length 129 [2021-12-17 19:06:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:04,198 INFO L470 AbstractCegarLoop]: Abstraction has 51005 states and 76626 transitions. [2021-12-17 19:06:04,198 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), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 19:06:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 51005 states and 76626 transitions. [2021-12-17 19:06:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 19:06:04,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:04,363 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, 1] [2021-12-17 19:06:04,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 19:06:04,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:04,581 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:04,581 INFO L85 PathProgramCache]: Analyzing trace with hash -318020336, now seen corresponding path program 1 times [2021-12-17 19:06:04,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:04,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987905706] [2021-12-17 19:06:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:04,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:06:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:06:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:06:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:06:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 19:06:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 19:06:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 19:06:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 19:06:04,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:04,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987905706] [2021-12-17 19:06:04,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987905706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:06:04,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769563850] [2021-12-17 19:06:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:04,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:04,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:06:04,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:06:04,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 19:06:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:04,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:06:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:06:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 19:06:05,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:06:05,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769563850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:05,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:06:05,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 19:06:05,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192844912] [2021-12-17 19:06:05,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:05,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:06:05,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:06:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:05,040 INFO L87 Difference]: Start difference. First operand 51005 states and 76626 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 19:06:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:07,663 INFO L93 Difference]: Finished difference Result 146441 states and 220113 transitions. [2021-12-17 19:06:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:06:07,663 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 167 [2021-12-17 19:06:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:08,025 INFO L225 Difference]: With dead ends: 146441 [2021-12-17 19:06:08,025 INFO L226 Difference]: Without dead ends: 97575 [2021-12-17 19:06:08,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:08,154 INFO L933 BasicCegarLoop]: 4206 mSDtfsCounter, 4097 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 4415 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:08,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4097 Valid, 4415 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:06:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-12-17 19:06:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96771. [2021-12-17 19:06:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96771 states, 83676 states have (on average 1.4634662268750895) internal successors, (122457), 84584 states have internal predecessors, (122457), 7623 states have call successors, (7623), 4703 states have call predecessors, (7623), 5470 states have return successors, (14146), 7547 states have call predecessors, (14146), 7621 states have call successors, (14146) [2021-12-17 19:06:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96771 states to 96771 states and 144226 transitions. [2021-12-17 19:06:11,819 INFO L78 Accepts]: Start accepts. Automaton has 96771 states and 144226 transitions. Word has length 167 [2021-12-17 19:06:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:11,820 INFO L470 AbstractCegarLoop]: Abstraction has 96771 states and 144226 transitions. [2021-12-17 19:06:11,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 19:06:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 96771 states and 144226 transitions. [2021-12-17 19:06:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-17 19:06:12,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:12,412 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:12,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 19:06:12,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:12,613 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:12,613 INFO L85 PathProgramCache]: Analyzing trace with hash 159535236, now seen corresponding path program 1 times [2021-12-17 19:06:12,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:12,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113487184] [2021-12-17 19:06:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:12,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:06:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:06:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:06:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:06:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 19:06:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 19:06:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-17 19:06:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 19:06:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 19:06:12,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:12,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113487184] [2021-12-17 19:06:12,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113487184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:06:12,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88946720] [2021-12-17 19:06:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:12,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:12,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:06:12,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:06:12,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 19:06:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 19:06:12,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:06:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 19:06:13,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:06:13,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88946720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:13,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:06:13,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:06:13,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832299985] [2021-12-17 19:06:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:13,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:06:13,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:06:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:13,056 INFO L87 Difference]: Start difference. First operand 96771 states and 144226 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:06:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 19:06:16,393 INFO L93 Difference]: Finished difference Result 203563 states and 306209 transitions. [2021-12-17 19:06:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 19:06:16,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 185 [2021-12-17 19:06:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 19:06:17,011 INFO L225 Difference]: With dead ends: 203563 [2021-12-17 19:06:17,011 INFO L226 Difference]: Without dead ends: 108933 [2021-12-17 19:06:17,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:17,162 INFO L933 BasicCegarLoop]: 4190 mSDtfsCounter, 4120 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4120 SdHoareTripleChecker+Valid, 4234 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 19:06:17,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4120 Valid, 4234 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 19:06:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108933 states. [2021-12-17 19:06:21,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108933 to 108933. [2021-12-17 19:06:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108933 states, 94834 states have (on average 1.4249636206423857) internal successors, (135135), 95742 states have internal predecessors, (135135), 7925 states have call successors, (7925), 5405 states have call predecessors, (7925), 6172 states have return successors, (14574), 7849 states have call predecessors, (14574), 7923 states have call successors, (14574) [2021-12-17 19:06:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108933 states to 108933 states and 157634 transitions. [2021-12-17 19:06:21,438 INFO L78 Accepts]: Start accepts. Automaton has 108933 states and 157634 transitions. Word has length 185 [2021-12-17 19:06:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 19:06:21,439 INFO L470 AbstractCegarLoop]: Abstraction has 108933 states and 157634 transitions. [2021-12-17 19:06:21,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 19:06:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 108933 states and 157634 transitions. [2021-12-17 19:06:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-17 19:06:21,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 19:06:21,949 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 19:06:21,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 19:06:22,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 19:06:22,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 19:06:22,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 19:06:22,164 INFO L85 PathProgramCache]: Analyzing trace with hash 644317989, now seen corresponding path program 1 times [2021-12-17 19:06:22,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 19:06:22,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156886131] [2021-12-17 19:06:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:22,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 19:06:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 19:06:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 19:06:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 19:06:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 19:06:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 19:06:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 19:06:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 19:06:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-17 19:06:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 19:06:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 19:06:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 19:06:22,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 19:06:22,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156886131] [2021-12-17 19:06:22,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156886131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 19:06:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995190525] [2021-12-17 19:06:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 19:06:22,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 19:06:22,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 19:06:22,267 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 19:06:22,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 19:06:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 19:06:22,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 19:06:22,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 19:06:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 19:06:22,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 19:06:22,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995190525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 19:06:22,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 19:06:22,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 19:06:22,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923051090] [2021-12-17 19:06:22,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 19:06:22,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 19:06:22,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 19:06:22,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 19:06:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 19:06:22,630 INFO L87 Difference]: Start difference. First operand 108933 states and 157634 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)