./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label45+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_label45+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 7ec37a095871269c822e7d35e6d840f2de134a68f657807281a5c0e96980df26 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:57:43,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:57:43,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:57:43,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:57:43,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:57:43,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:57:43,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:57:43,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:57:43,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:57:43,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:57:43,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:57:43,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:57:43,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:57:43,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:57:43,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:57:43,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:57:43,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:57:43,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:57:43,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:57:43,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:57:43,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:57:43,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:57:43,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:57:43,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:57:43,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:57:43,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:57:43,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:57:43,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:57:43,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:57:43,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:57:43,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:57:43,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:57:43,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:57:43,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:57:43,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:57:43,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:57:43,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:57:43,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:57:43,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:57:43,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:57:43,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:57:43,993 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:57:44,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:57:44,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:57:44,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:57:44,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:57:44,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:57:44,028 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:57:44,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:57:44,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:57:44,029 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:57:44,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:57:44,030 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:57:44,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:57:44,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:57:44,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:57:44,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:57:44,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:57:44,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:57:44,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:57:44,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:57:44,032 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:57:44,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:57:44,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:57:44,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:57:44,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:57:44,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:57:44,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:57:44,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:57:44,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:57:44,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:57:44,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:57:44,034 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:57:44,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:57:44,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:57:44,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:57:44,035 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ec37a095871269c822e7d35e6d840f2de134a68f657807281a5c0e96980df26 [2021-12-16 01:57:44,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:57:44,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:57:44,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:57:44,320 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:57:44,321 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:57:44,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c [2021-12-16 01:57:44,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6195f97/b5454fc53e2d44dc932d5ebc6ef3b69b/FLAG55436d6c2 [2021-12-16 01:57:45,266 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:57:45,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c [2021-12-16 01:57:45,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6195f97/b5454fc53e2d44dc932d5ebc6ef3b69b/FLAG55436d6c2 [2021-12-16 01:57:45,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6195f97/b5454fc53e2d44dc932d5ebc6ef3b69b [2021-12-16 01:57:45,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:57:45,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:57:45,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:57:45,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:57:45,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:57:45,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:57:45" (1/1) ... [2021-12-16 01:57:45,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1658edc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:45, skipping insertion in model container [2021-12-16 01:57:45,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:57:45" (1/1) ... [2021-12-16 01:57:45,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:57:45,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:57:47,505 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_label45+token_ring.03.cil-1.c[380323,380336] [2021-12-16 01:57:47,529 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_label45+token_ring.03.cil-1.c[383339,383352] [2021-12-16 01:57:47,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:57:47,702 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:57:48,419 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_label45+token_ring.03.cil-1.c[380323,380336] [2021-12-16 01:57:48,426 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_label45+token_ring.03.cil-1.c[383339,383352] [2021-12-16 01:57:48,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:57:48,500 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:57:48,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48 WrapperNode [2021-12-16 01:57:48,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:57:48,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:57:48,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:57:48,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:57:48,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:48,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:49,003 INFO L137 Inliner]: procedures = 50, calls = 51, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 12682 [2021-12-16 01:57:49,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:57:49,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:57:49,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:57:49,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:57:49,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:49,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:49,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:49,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:49,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:49,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:49,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:49,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:57:49,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:57:49,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:57:49,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:57:49,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (1/1) ... [2021-12-16 01:57:49,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:57:49,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:57:49,653 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) [2021-12-16 01:57:49,701 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 [2021-12-16 01:57:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:57:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-16 01:57:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-16 01:57:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 01:57:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 01:57:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-16 01:57:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-16 01:57:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-16 01:57:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-16 01:57:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-16 01:57:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-16 01:57:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-16 01:57:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-16 01:57:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-16 01:57:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-16 01:57:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:57:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:57:49,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:57:49,900 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:57:49,902 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:57:55,800 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:57:55,831 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:57:55,832 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-16 01:57:55,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:57:55 BoogieIcfgContainer [2021-12-16 01:57:55,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:57:55,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:57:55,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:57:55,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:57:55,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:57:45" (1/3) ... [2021-12-16 01:57:55,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b4084d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:57:55, skipping insertion in model container [2021-12-16 01:57:55,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:57:48" (2/3) ... [2021-12-16 01:57:55,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b4084d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:57:55, skipping insertion in model container [2021-12-16 01:57:55,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:57:55" (3/3) ... [2021-12-16 01:57:55,847 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.03.cil-1.c [2021-12-16 01:57:55,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:57:55,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 01:57:55,912 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:57:55,918 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 [2021-12-16 01:57:55,918 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 01:57:55,973 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) [2021-12-16 01:57:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 01:57:55,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:55,985 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] [2021-12-16 01:57:55,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:55,991 INFO L85 PathProgramCache]: Analyzing trace with hash 520182233, now seen corresponding path program 1 times [2021-12-16 01:57:55,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:55,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582802945] [2021-12-16 01:57:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:56,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:56,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:56,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:57:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:56,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:57:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:56,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:57:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:56,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:57:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:57:56,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:56,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582802945] [2021-12-16 01:57:56,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582802945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:56,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:57:56,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:57:56,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240334867] [2021-12-16 01:57:56,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:56,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:57:56,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:57:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:57:56,492 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) [2021-12-16 01:57:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:57,705 INFO L93 Difference]: Finished difference Result 4921 states and 9054 transitions. [2021-12-16 01:57:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:57:57,709 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 [2021-12-16 01:57:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:57,741 INFO L225 Difference]: With dead ends: 4921 [2021-12-16 01:57:57,742 INFO L226 Difference]: Without dead ends: 2514 [2021-12-16 01:57:57,750 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 [2021-12-16 01:57:57,753 INFO L933 BasicCegarLoop]: 4299 mSDtfsCounter, 4559 mSDsluCounter, 12541 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:57,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4569 Valid, 16840 Invalid, 759 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [88 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 01:57:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-12-16 01:57:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2427. [2021-12-16 01:57:57,918 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) [2021-12-16 01:57:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 4420 transitions. [2021-12-16 01:57:57,932 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 4420 transitions. Word has length 80 [2021-12-16 01:57:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:57,933 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 4420 transitions. [2021-12-16 01:57:57,933 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) [2021-12-16 01:57:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 4420 transitions. [2021-12-16 01:57:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 01:57:57,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:57,938 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] [2021-12-16 01:57:57,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:57:57,939 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:57,940 INFO L85 PathProgramCache]: Analyzing trace with hash -721258283, now seen corresponding path program 1 times [2021-12-16 01:57:57,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:57,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889499752] [2021-12-16 01:57:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:57,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:57,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:57,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:57:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:58,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:57:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:58,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:57:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:58,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:57:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:57:58,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:58,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889499752] [2021-12-16 01:57:58,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889499752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:58,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:57:58,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:57:58,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212609092] [2021-12-16 01:57:58,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:58,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:57:58,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:57:58,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:57:58,107 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) [2021-12-16 01:57:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:57:59,282 INFO L93 Difference]: Finished difference Result 3000 states and 5300 transitions. [2021-12-16 01:57:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:57:59,283 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 [2021-12-16 01:57:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:57:59,298 INFO L225 Difference]: With dead ends: 3000 [2021-12-16 01:57:59,299 INFO L226 Difference]: Without dead ends: 2705 [2021-12-16 01:57:59,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:57:59,302 INFO L933 BasicCegarLoop]: 4344 mSDtfsCounter, 4483 mSDsluCounter, 16678 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 01:57:59,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4493 Valid, 21022 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 01:57:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-12-16 01:57:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2565. [2021-12-16 01:57:59,376 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) [2021-12-16 01:57:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 4625 transitions. [2021-12-16 01:57:59,390 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 4625 transitions. Word has length 80 [2021-12-16 01:57:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:57:59,390 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 4625 transitions. [2021-12-16 01:57:59,391 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) [2021-12-16 01:57:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 4625 transitions. [2021-12-16 01:57:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 01:57:59,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:57:59,397 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] [2021-12-16 01:57:59,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:57:59,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:57:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:57:59,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1887529175, now seen corresponding path program 1 times [2021-12-16 01:57:59,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:57:59,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307707144] [2021-12-16 01:57:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:57:59,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:57:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:59,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:57:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:59,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:57:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:59,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:57:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:59,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:57:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:59,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:57:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:57:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:57:59,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:57:59,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307707144] [2021-12-16 01:57:59,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307707144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:57:59,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:57:59,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:57:59,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065255909] [2021-12-16 01:57:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:57:59,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:57:59,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:57:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:57:59,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:57:59,551 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) [2021-12-16 01:58:00,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:00,626 INFO L93 Difference]: Finished difference Result 3497 states and 6053 transitions. [2021-12-16 01:58:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:58:00,627 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 [2021-12-16 01:58:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:00,642 INFO L225 Difference]: With dead ends: 3497 [2021-12-16 01:58:00,642 INFO L226 Difference]: Without dead ends: 3064 [2021-12-16 01:58:00,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:58:00,652 INFO L933 BasicCegarLoop]: 4336 mSDtfsCounter, 4480 mSDsluCounter, 16674 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 01:58:00,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4490 Valid, 21010 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 01:58:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-12-16 01:58:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2842. [2021-12-16 01:58:00,742 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) [2021-12-16 01:58:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 5040 transitions. [2021-12-16 01:58:00,758 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 5040 transitions. Word has length 80 [2021-12-16 01:58:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:00,758 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 5040 transitions. [2021-12-16 01:58:00,758 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) [2021-12-16 01:58:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 5040 transitions. [2021-12-16 01:58:00,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 01:58:00,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:00,761 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] [2021-12-16 01:58:00,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:58:00,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:00,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1833136277, now seen corresponding path program 1 times [2021-12-16 01:58:00,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:00,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560086856] [2021-12-16 01:58:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:00,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:00,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:00,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:00,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:00,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:00,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:58:00,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:00,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560086856] [2021-12-16 01:58:00,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560086856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:00,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:58:00,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:58:00,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746827390] [2021-12-16 01:58:00,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:00,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:58:00,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:00,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:58:00,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:58:00,864 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) [2021-12-16 01:58:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:02,010 INFO L93 Difference]: Finished difference Result 4458 states and 7508 transitions. [2021-12-16 01:58:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:58:02,011 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 [2021-12-16 01:58:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:02,029 INFO L225 Difference]: With dead ends: 4458 [2021-12-16 01:58:02,033 INFO L226 Difference]: Without dead ends: 3748 [2021-12-16 01:58:02,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:58:02,045 INFO L933 BasicCegarLoop]: 4332 mSDtfsCounter, 4476 mSDsluCounter, 16674 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 01:58:02,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4486 Valid, 21006 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 01:58:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-12-16 01:58:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3397. [2021-12-16 01:58:02,157 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) [2021-12-16 01:58:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5876 transitions. [2021-12-16 01:58:02,176 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5876 transitions. Word has length 80 [2021-12-16 01:58:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:02,182 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 5876 transitions. [2021-12-16 01:58:02,182 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) [2021-12-16 01:58:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5876 transitions. [2021-12-16 01:58:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 01:58:02,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:02,185 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] [2021-12-16 01:58:02,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:58:02,185 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:02,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1415739671, now seen corresponding path program 1 times [2021-12-16 01:58:02,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:02,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471208571] [2021-12-16 01:58:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:02,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:02,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:02,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:02,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:02,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:58:02,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:02,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471208571] [2021-12-16 01:58:02,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471208571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:02,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:58:02,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:58:02,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033437279] [2021-12-16 01:58:02,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:02,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:58:02,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:58:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:58:02,287 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) [2021-12-16 01:58:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:02,816 INFO L93 Difference]: Finished difference Result 5008 states and 8361 transitions. [2021-12-16 01:58:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:58:02,817 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 [2021-12-16 01:58:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:02,833 INFO L225 Difference]: With dead ends: 5008 [2021-12-16 01:58:02,834 INFO L226 Difference]: Without dead ends: 3743 [2021-12-16 01:58:02,839 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 [2021-12-16 01:58:02,840 INFO L933 BasicCegarLoop]: 4181 mSDtfsCounter, 4411 mSDsluCounter, 12180 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 01:58:02,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4422 Valid, 16361 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 01:58:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-12-16 01:58:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3397. [2021-12-16 01:58:02,932 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) [2021-12-16 01:58:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 5867 transitions. [2021-12-16 01:58:02,941 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 5867 transitions. Word has length 80 [2021-12-16 01:58:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:02,942 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 5867 transitions. [2021-12-16 01:58:02,942 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) [2021-12-16 01:58:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 5867 transitions. [2021-12-16 01:58:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 01:58:02,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:02,944 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] [2021-12-16 01:58:02,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:58:02,945 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2095011925, now seen corresponding path program 1 times [2021-12-16 01:58:02,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:02,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206712965] [2021-12-16 01:58:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:02,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:02,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:02,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:03,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:03,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:03,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:58:03,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:03,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206712965] [2021-12-16 01:58:03,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206712965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:03,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:58:03,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:58:03,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737187409] [2021-12-16 01:58:03,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:03,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:58:03,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:03,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:58:03,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:58:03,029 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) [2021-12-16 01:58:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:04,208 INFO L93 Difference]: Finished difference Result 6680 states and 10828 transitions. [2021-12-16 01:58:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:58:04,209 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 [2021-12-16 01:58:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:04,233 INFO L225 Difference]: With dead ends: 6680 [2021-12-16 01:58:04,234 INFO L226 Difference]: Without dead ends: 5415 [2021-12-16 01:58:04,240 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 [2021-12-16 01:58:04,241 INFO L933 BasicCegarLoop]: 4361 mSDtfsCounter, 4489 mSDsluCounter, 16663 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 01:58:04,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4498 Valid, 21024 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 01:58:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5415 states. [2021-12-16 01:58:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5415 to 4416. [2021-12-16 01:58:04,378 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) [2021-12-16 01:58:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4416 states to 4416 states and 7388 transitions. [2021-12-16 01:58:04,479 INFO L78 Accepts]: Start accepts. Automaton has 4416 states and 7388 transitions. Word has length 80 [2021-12-16 01:58:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:04,480 INFO L470 AbstractCegarLoop]: Abstraction has 4416 states and 7388 transitions. [2021-12-16 01:58:04,480 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) [2021-12-16 01:58:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4416 states and 7388 transitions. [2021-12-16 01:58:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 01:58:04,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:04,483 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] [2021-12-16 01:58:04,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:58:04,483 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:04,484 INFO L85 PathProgramCache]: Analyzing trace with hash -238380713, now seen corresponding path program 1 times [2021-12-16 01:58:04,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:04,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884570085] [2021-12-16 01:58:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:04,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:04,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:04,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:04,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:04,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:04,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:58:04,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884570085] [2021-12-16 01:58:04,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884570085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:04,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:58:04,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 01:58:04,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074212364] [2021-12-16 01:58:04,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:04,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 01:58:04,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 01:58:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:58:04,565 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) [2021-12-16 01:58:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:05,662 INFO L93 Difference]: Finished difference Result 10073 states and 15935 transitions. [2021-12-16 01:58:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 01:58:05,662 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 [2021-12-16 01:58:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:05,697 INFO L225 Difference]: With dead ends: 10073 [2021-12-16 01:58:05,698 INFO L226 Difference]: Without dead ends: 7789 [2021-12-16 01:58:05,708 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 [2021-12-16 01:58:05,709 INFO L933 BasicCegarLoop]: 4311 mSDtfsCounter, 4480 mSDsluCounter, 16666 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 01:58:05,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4494 Valid, 20977 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 01:58:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7789 states. [2021-12-16 01:58:05,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7789 to 6539. [2021-12-16 01:58:05,965 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) [2021-12-16 01:58:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 10646 transitions. [2021-12-16 01:58:05,986 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 10646 transitions. Word has length 80 [2021-12-16 01:58:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:05,988 INFO L470 AbstractCegarLoop]: Abstraction has 6539 states and 10646 transitions. [2021-12-16 01:58:05,988 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) [2021-12-16 01:58:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 10646 transitions. [2021-12-16 01:58:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 01:58:05,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:05,994 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] [2021-12-16 01:58:05,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:58:05,994 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:05,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash 322319065, now seen corresponding path program 1 times [2021-12-16 01:58:05,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:05,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183816678] [2021-12-16 01:58:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:05,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:06,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:06,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:06,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:06,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:58:06,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:06,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183816678] [2021-12-16 01:58:06,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183816678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:06,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:58:06,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:58:06,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752684218] [2021-12-16 01:58:06,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:06,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:58:06,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:58:06,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:58:06,075 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) [2021-12-16 01:58:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:07,258 INFO L93 Difference]: Finished difference Result 14625 states and 22920 transitions. [2021-12-16 01:58:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:58:07,259 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 [2021-12-16 01:58:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:07,299 INFO L225 Difference]: With dead ends: 14625 [2021-12-16 01:58:07,300 INFO L226 Difference]: Without dead ends: 10219 [2021-12-16 01:58:07,319 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 [2021-12-16 01:58:07,320 INFO L933 BasicCegarLoop]: 4398 mSDtfsCounter, 4640 mSDsluCounter, 12372 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4667 SdHoareTripleChecker+Valid, 16770 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 01:58:07,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4667 Valid, 16770 Invalid, 904 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [93 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 01:58:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10219 states. [2021-12-16 01:58:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10219 to 8729. [2021-12-16 01:58:07,673 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) [2021-12-16 01:58:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8729 states to 8729 states and 13812 transitions. [2021-12-16 01:58:07,700 INFO L78 Accepts]: Start accepts. Automaton has 8729 states and 13812 transitions. Word has length 80 [2021-12-16 01:58:07,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:07,701 INFO L470 AbstractCegarLoop]: Abstraction has 8729 states and 13812 transitions. [2021-12-16 01:58:07,701 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) [2021-12-16 01:58:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 8729 states and 13812 transitions. [2021-12-16 01:58:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 01:58:07,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:07,720 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] [2021-12-16 01:58:07,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:58:07,721 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:07,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2072406432, now seen corresponding path program 1 times [2021-12-16 01:58:07,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:07,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376233561] [2021-12-16 01:58:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:07,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 01:58:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:58:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-16 01:58:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 01:58:07,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:07,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376233561] [2021-12-16 01:58:07,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376233561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:58:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911136598] [2021-12-16 01:58:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:07,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:58:07,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:58:07,839 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) [2021-12-16 01:58:07,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 01:58:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:58:07,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:58:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 01:58:08,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:58:08,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911136598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:08,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:58:08,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 01:58:08,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096065227] [2021-12-16 01:58:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:08,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:58:08,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:58:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:58:08,211 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) [2021-12-16 01:58:08,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:08,680 INFO L93 Difference]: Finished difference Result 21742 states and 33432 transitions. [2021-12-16 01:58:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:58:08,681 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 [2021-12-16 01:58:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:08,741 INFO L225 Difference]: With dead ends: 21742 [2021-12-16 01:58:08,741 INFO L226 Difference]: Without dead ends: 15146 [2021-12-16 01:58:08,770 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 [2021-12-16 01:58:08,771 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 [2021-12-16 01:58:08,771 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] [2021-12-16 01:58:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15146 states. [2021-12-16 01:58:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15146 to 15042. [2021-12-16 01:58:09,314 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) [2021-12-16 01:58:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 23157 transitions. [2021-12-16 01:58:09,508 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 23157 transitions. Word has length 129 [2021-12-16 01:58:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:09,508 INFO L470 AbstractCegarLoop]: Abstraction has 15042 states and 23157 transitions. [2021-12-16 01:58:09,509 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) [2021-12-16 01:58:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 23157 transitions. [2021-12-16 01:58:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 01:58:09,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:09,533 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] [2021-12-16 01:58:09,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 01:58:09,763 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 [2021-12-16 01:58:09,763 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:09,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:09,764 INFO L85 PathProgramCache]: Analyzing trace with hash -853257536, now seen corresponding path program 1 times [2021-12-16 01:58:09,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:09,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143897834] [2021-12-16 01:58:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:09,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:09,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:09,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:09,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:09,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:09,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:09,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 01:58:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:09,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:58:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:09,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-16 01:58:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 01:58:09,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:09,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143897834] [2021-12-16 01:58:09,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143897834] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:58:09,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769578915] [2021-12-16 01:58:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:09,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:58:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:58:09,904 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) [2021-12-16 01:58:09,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 01:58:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:10,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:58:10,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:58:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 01:58:10,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:58:10,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769578915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:10,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:58:10,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 01:58:10,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114501463] [2021-12-16 01:58:10,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:10,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:58:10,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:58:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:58:10,274 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) [2021-12-16 01:58:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:10,927 INFO L93 Difference]: Finished difference Result 40359 states and 61183 transitions. [2021-12-16 01:58:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:58:10,927 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 [2021-12-16 01:58:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:11,043 INFO L225 Difference]: With dead ends: 40359 [2021-12-16 01:58:11,044 INFO L226 Difference]: Without dead ends: 27450 [2021-12-16 01:58:11,099 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 [2021-12-16 01:58:11,100 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 [2021-12-16 01:58:11,101 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] [2021-12-16 01:58:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27450 states. [2021-12-16 01:58:12,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27450 to 27246. [2021-12-16 01:58:12,112 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) [2021-12-16 01:58:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27246 states to 27246 states and 41201 transitions. [2021-12-16 01:58:12,200 INFO L78 Accepts]: Start accepts. Automaton has 27246 states and 41201 transitions. Word has length 129 [2021-12-16 01:58:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:12,201 INFO L470 AbstractCegarLoop]: Abstraction has 27246 states and 41201 transitions. [2021-12-16 01:58:12,201 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) [2021-12-16 01:58:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 27246 states and 41201 transitions. [2021-12-16 01:58:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-16 01:58:12,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:12,283 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] [2021-12-16 01:58:12,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 01:58:12,503 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 [2021-12-16 01:58:12,503 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2127588384, now seen corresponding path program 1 times [2021-12-16 01:58:12,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:12,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483913808] [2021-12-16 01:58:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:12,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 01:58:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:58:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-16 01:58:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 01:58:12,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:12,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483913808] [2021-12-16 01:58:12,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483913808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:58:12,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027538259] [2021-12-16 01:58:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:12,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:58:12,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:58:12,621 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) [2021-12-16 01:58:12,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 01:58:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:12,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:58:12,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:58:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-16 01:58:12,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:58:12,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027538259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:12,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:58:12,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:58:12,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930458482] [2021-12-16 01:58:12,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:12,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:58:12,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:58:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:58:12,957 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) [2021-12-16 01:58:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:14,428 INFO L93 Difference]: Finished difference Result 76117 states and 114817 transitions. [2021-12-16 01:58:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:58:14,429 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 [2021-12-16 01:58:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:14,705 INFO L225 Difference]: With dead ends: 76117 [2021-12-16 01:58:14,705 INFO L226 Difference]: Without dead ends: 51005 [2021-12-16 01:58:14,785 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 [2021-12-16 01:58:14,786 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 [2021-12-16 01:58:14,786 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] [2021-12-16 01:58:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51005 states. [2021-12-16 01:58:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51005 to 51005. [2021-12-16 01:58:16,574 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) [2021-12-16 01:58:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51005 states to 51005 states and 76626 transitions. [2021-12-16 01:58:16,741 INFO L78 Accepts]: Start accepts. Automaton has 51005 states and 76626 transitions. Word has length 129 [2021-12-16 01:58:16,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:16,741 INFO L470 AbstractCegarLoop]: Abstraction has 51005 states and 76626 transitions. [2021-12-16 01:58:16,742 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) [2021-12-16 01:58:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 51005 states and 76626 transitions. [2021-12-16 01:58:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-16 01:58:16,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:16,878 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] [2021-12-16 01:58:16,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 01:58:17,103 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 [2021-12-16 01:58:17,103 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash -318020336, now seen corresponding path program 1 times [2021-12-16 01:58:17,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:17,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720163198] [2021-12-16 01:58:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:17,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 01:58:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:58:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 01:58:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:58:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-16 01:58:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 01:58:17,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720163198] [2021-12-16 01:58:17,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720163198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:58:17,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090762530] [2021-12-16 01:58:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:17,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:58:17,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:58:17,230 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) [2021-12-16 01:58:17,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 01:58:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:17,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:58:17,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:58:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-16 01:58:17,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:58:17,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090762530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:17,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:58:17,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 01:58:17,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656079861] [2021-12-16 01:58:17,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:17,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:58:17,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:17,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:58:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:58:17,844 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) [2021-12-16 01:58:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:20,245 INFO L93 Difference]: Finished difference Result 146441 states and 220113 transitions. [2021-12-16 01:58:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:58:20,245 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 [2021-12-16 01:58:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:20,687 INFO L225 Difference]: With dead ends: 146441 [2021-12-16 01:58:20,688 INFO L226 Difference]: Without dead ends: 97575 [2021-12-16 01:58:20,844 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 [2021-12-16 01:58:20,845 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 [2021-12-16 01:58:20,845 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] [2021-12-16 01:58:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97575 states. [2021-12-16 01:58:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97575 to 96771. [2021-12-16 01:58:24,543 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) [2021-12-16 01:58:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96771 states to 96771 states and 144226 transitions. [2021-12-16 01:58:25,602 INFO L78 Accepts]: Start accepts. Automaton has 96771 states and 144226 transitions. Word has length 167 [2021-12-16 01:58:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:58:25,603 INFO L470 AbstractCegarLoop]: Abstraction has 96771 states and 144226 transitions. [2021-12-16 01:58:25,603 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) [2021-12-16 01:58:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 96771 states and 144226 transitions. [2021-12-16 01:58:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-16 01:58:25,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:58:25,987 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] [2021-12-16 01:58:26,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 01:58:26,214 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 [2021-12-16 01:58:26,215 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:58:26,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:58:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash 159535236, now seen corresponding path program 1 times [2021-12-16 01:58:26,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:58:26,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249880506] [2021-12-16 01:58:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:26,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:58:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 01:58:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:58:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 01:58:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:58:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 01:58:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 01:58:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 01:58:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:58:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-16 01:58:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 01:58:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-16 01:58:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-16 01:58:26,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:58:26,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249880506] [2021-12-16 01:58:26,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249880506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:58:26,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361775704] [2021-12-16 01:58:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:58:26,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:58:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:58:26,370 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) [2021-12-16 01:58:26,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 01:58:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:58:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 01:58:26,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:58:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 01:58:26,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:58:26,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361775704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:58:26,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:58:26,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 01:58:26,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382947209] [2021-12-16 01:58:26,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:58:26,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:58:26,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:58:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:58:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 01:58:26,834 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) [2021-12-16 01:58:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:58:30,756 INFO L93 Difference]: Finished difference Result 203563 states and 306209 transitions. [2021-12-16 01:58:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:58:30,757 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 [2021-12-16 01:58:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:58:31,527 INFO L225 Difference]: With dead ends: 203563 [2021-12-16 01:58:31,528 INFO L226 Difference]: Without dead ends: 108933 [2021-12-16 01:58:31,774 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 [2021-12-16 01:58:31,774 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 [2021-12-16 01:58:31,775 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] [2021-12-16 01:58:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108933 states.