./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.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 558f970b63375a18824a4471ce91e71e4e14632a20bfa5002df552fa8b202ea3 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:18:28,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:18:28,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:18:28,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:18:28,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:18:28,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:18:28,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:18:28,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:18:28,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:18:28,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:18:28,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:18:28,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:18:28,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:18:28,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:18:28,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:18:28,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:18:28,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:18:28,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:18:28,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:18:28,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:18:28,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:18:28,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:18:28,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:18:28,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:18:28,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:18:28,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:18:28,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:18:28,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:18:28,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:18:28,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:18:28,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:18:28,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:18:28,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:18:28,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:18:28,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:18:28,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:18:28,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:18:28,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:18:28,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:18:28,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:18:28,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:18:28,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:18:28,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:18:28,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:18:28,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:18:28,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:18:28,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:18:28,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:18:28,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:18:28,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:18:28,935 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:18:28,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:18:28,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:18:28,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:18:28,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:18:28,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:18:28,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:18:28,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:18:28,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:18:28,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:18:28,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:18:28,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:18:28,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:18:28,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:18:28,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:18:28,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:18:28,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:18:28,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:18:28,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:18:28,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:18:28,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:18:28,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:18:28,941 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:18:28,941 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:18:28,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:18:28,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:18:28,942 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 558f970b63375a18824a4471ce91e71e4e14632a20bfa5002df552fa8b202ea3 [2021-12-15 11:18:29,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:18:29,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:18:29,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:18:29,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:18:29,214 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:18:29,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c [2021-12-15 11:18:29,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a96130fa1/53ea44ff3ed04d3698b16c885fc355ab/FLAG362047bda [2021-12-15 11:18:29,732 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:18:29,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c [2021-12-15 11:18:29,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a96130fa1/53ea44ff3ed04d3698b16c885fc355ab/FLAG362047bda [2021-12-15 11:18:30,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a96130fa1/53ea44ff3ed04d3698b16c885fc355ab [2021-12-15 11:18:30,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:18:30,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:18:30,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:18:30,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:18:30,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:18:30,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45609721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30, skipping insertion in model container [2021-12-15 11:18:30,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:18:30,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:18:30,411 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/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c[14509,14522] [2021-12-15 11:18:30,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:18:30,425 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:18:30,508 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/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c[14509,14522] [2021-12-15 11:18:30,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:18:30,536 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:18:30,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30 WrapperNode [2021-12-15 11:18:30,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:18:30,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:18:30,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:18:30,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:18:30,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,613 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 479 [2021-12-15 11:18:30,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:18:30,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:18:30,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:18:30,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:18:30,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:18:30,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:18:30,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:18:30,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:18:30,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (1/1) ... [2021-12-15 11:18:30,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:18:30,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:18:30,715 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) [2021-12-15 11:18:30,716 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 [2021-12-15 11:18:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:18:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:18:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:18:30,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:18:30,880 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:18:30,896 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:18:31,438 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:18:31,450 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:18:31,450 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:18:31,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:18:31 BoogieIcfgContainer [2021-12-15 11:18:31,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:18:31,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:18:31,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:18:31,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:18:31,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:18:30" (1/3) ... [2021-12-15 11:18:31,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e17c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:18:31, skipping insertion in model container [2021-12-15 11:18:31,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:18:30" (2/3) ... [2021-12-15 11:18:31,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e17c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:18:31, skipping insertion in model container [2021-12-15 11:18:31,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:18:31" (3/3) ... [2021-12-15 11:18:31,461 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c [2021-12-15 11:18:31,465 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:18:31,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:18:31,502 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:18:31,507 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 [2021-12-15 11:18:31,507 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:18:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.748299319727891) internal successors, (257), 148 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:18:31,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:31,535 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] [2021-12-15 11:18:31,535 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash -812713456, now seen corresponding path program 1 times [2021-12-15 11:18:31,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:31,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286932025] [2021-12-15 11:18:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:31,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:31,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:31,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286932025] [2021-12-15 11:18:31,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286932025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:31,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:31,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:18:31,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981682882] [2021-12-15 11:18:31,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:31,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:18:31,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:31,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:18:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:18:31,894 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.748299319727891) internal successors, (257), 148 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:31,939 INFO L93 Difference]: Finished difference Result 235 states and 403 transitions. [2021-12-15 11:18:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:18:31,941 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 11:18:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:31,952 INFO L225 Difference]: With dead ends: 235 [2021-12-15 11:18:31,955 INFO L226 Difference]: Without dead ends: 145 [2021-12-15 11:18:31,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:18:31,964 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:31,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-15 11:18:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-15 11:18:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7361111111111112) internal successors, (250), 144 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 250 transitions. [2021-12-15 11:18:32,035 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 250 transitions. Word has length 37 [2021-12-15 11:18:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:32,036 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 250 transitions. [2021-12-15 11:18:32,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 250 transitions. [2021-12-15 11:18:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 11:18:32,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:32,039 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] [2021-12-15 11:18:32,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:18:32,040 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1630361906, now seen corresponding path program 1 times [2021-12-15 11:18:32,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:32,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496350038] [2021-12-15 11:18:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:32,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:32,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:32,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496350038] [2021-12-15 11:18:32,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496350038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:32,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:32,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:32,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853089971] [2021-12-15 11:18:32,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:32,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:32,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:32,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:32,178 INFO L87 Difference]: Start difference. First operand 145 states and 250 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:32,289 INFO L93 Difference]: Finished difference Result 234 states and 396 transitions. [2021-12-15 11:18:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:32,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 11:18:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:32,294 INFO L225 Difference]: With dead ends: 234 [2021-12-15 11:18:32,294 INFO L226 Difference]: Without dead ends: 145 [2021-12-15 11:18:32,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:18:32,300 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 3 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:32,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 959 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-15 11:18:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-12-15 11:18:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5277777777777777) internal successors, (220), 144 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 220 transitions. [2021-12-15 11:18:32,319 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 220 transitions. Word has length 37 [2021-12-15 11:18:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:32,320 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 220 transitions. [2021-12-15 11:18:32,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 220 transitions. [2021-12-15 11:18:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:18:32,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:32,328 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] [2021-12-15 11:18:32,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:18:32,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash 190573204, now seen corresponding path program 1 times [2021-12-15 11:18:32,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:32,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876388681] [2021-12-15 11:18:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:32,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:32,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:32,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876388681] [2021-12-15 11:18:32,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876388681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:32,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:32,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:32,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300399451] [2021-12-15 11:18:32,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:32,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:32,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:32,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:32,455 INFO L87 Difference]: Start difference. First operand 145 states and 220 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:32,492 INFO L93 Difference]: Finished difference Result 305 states and 486 transitions. [2021-12-15 11:18:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:32,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-15 11:18:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:32,494 INFO L225 Difference]: With dead ends: 305 [2021-12-15 11:18:32,494 INFO L226 Difference]: Without dead ends: 220 [2021-12-15 11:18:32,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:32,496 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 115 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:32,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 388 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-15 11:18:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2021-12-15 11:18:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.5555555555555556) internal successors, (336), 216 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 336 transitions. [2021-12-15 11:18:32,507 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 336 transitions. Word has length 66 [2021-12-15 11:18:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:32,508 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 336 transitions. [2021-12-15 11:18:32,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,508 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 336 transitions. [2021-12-15 11:18:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 11:18:32,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:32,509 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] [2021-12-15 11:18:32,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:18:32,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:32,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1527919177, now seen corresponding path program 1 times [2021-12-15 11:18:32,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:32,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803595784] [2021-12-15 11:18:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:32,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:32,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:32,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803595784] [2021-12-15 11:18:32,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803595784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:32,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:32,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:32,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464087466] [2021-12-15 11:18:32,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:32,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:32,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:32,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:32,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:32,635 INFO L87 Difference]: Start difference. First operand 217 states and 336 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:32,663 INFO L93 Difference]: Finished difference Result 515 states and 824 transitions. [2021-12-15 11:18:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 11:18:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:32,668 INFO L225 Difference]: With dead ends: 515 [2021-12-15 11:18:32,668 INFO L226 Difference]: Without dead ends: 358 [2021-12-15 11:18:32,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:32,679 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 117 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 401 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 [2021-12-15 11:18:32,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 401 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-15 11:18:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2021-12-15 11:18:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.5835694050991502) internal successors, (559), 353 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 559 transitions. [2021-12-15 11:18:32,709 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 559 transitions. Word has length 68 [2021-12-15 11:18:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:32,710 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 559 transitions. [2021-12-15 11:18:32,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 559 transitions. [2021-12-15 11:18:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 11:18:32,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:32,712 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] [2021-12-15 11:18:32,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:18:32,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1063335298, now seen corresponding path program 1 times [2021-12-15 11:18:32,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:32,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853111867] [2021-12-15 11:18:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:32,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:32,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:32,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853111867] [2021-12-15 11:18:32,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853111867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:32,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:32,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:32,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027317890] [2021-12-15 11:18:32,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:32,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:32,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:32,771 INFO L87 Difference]: Start difference. First operand 354 states and 559 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:32,803 INFO L93 Difference]: Finished difference Result 910 states and 1465 transitions. [2021-12-15 11:18:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-15 11:18:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:32,807 INFO L225 Difference]: With dead ends: 910 [2021-12-15 11:18:32,807 INFO L226 Difference]: Without dead ends: 616 [2021-12-15 11:18:32,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:32,808 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 111 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 402 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 [2021-12-15 11:18:32,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 402 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-12-15 11:18:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 610. [2021-12-15 11:18:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 1.5944170771756978) internal successors, (971), 609 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 971 transitions. [2021-12-15 11:18:32,833 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 971 transitions. Word has length 70 [2021-12-15 11:18:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:32,834 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 971 transitions. [2021-12-15 11:18:32,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:32,834 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 971 transitions. [2021-12-15 11:18:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:18:32,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:32,836 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] [2021-12-15 11:18:32,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:18:32,836 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash 845837107, now seen corresponding path program 1 times [2021-12-15 11:18:32,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:32,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805718572] [2021-12-15 11:18:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:32,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:32,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805718572] [2021-12-15 11:18:32,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805718572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:32,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:32,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:32,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793215127] [2021-12-15 11:18:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:32,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:32,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:32,929 INFO L87 Difference]: Start difference. First operand 610 states and 971 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:33,090 INFO L93 Difference]: Finished difference Result 2622 states and 4281 transitions. [2021-12-15 11:18:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:18:33,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 11:18:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:33,102 INFO L225 Difference]: With dead ends: 2622 [2021-12-15 11:18:33,103 INFO L226 Difference]: Without dead ends: 2072 [2021-12-15 11:18:33,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:18:33,106 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 936 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:33,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 1286 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-15 11:18:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1092. [2021-12-15 11:18:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 1.6076993583868011) internal successors, (1754), 1091 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1754 transitions. [2021-12-15 11:18:33,160 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1754 transitions. Word has length 72 [2021-12-15 11:18:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:33,162 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1754 transitions. [2021-12-15 11:18:33,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1754 transitions. [2021-12-15 11:18:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 11:18:33,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:33,164 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] [2021-12-15 11:18:33,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:18:33,164 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1471686026, now seen corresponding path program 1 times [2021-12-15 11:18:33,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:33,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277168407] [2021-12-15 11:18:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:33,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:33,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:33,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277168407] [2021-12-15 11:18:33,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277168407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:33,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:33,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:33,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060466664] [2021-12-15 11:18:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:33,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:33,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:33,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:33,262 INFO L87 Difference]: Start difference. First operand 1092 states and 1754 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:33,360 INFO L93 Difference]: Finished difference Result 3182 states and 5186 transitions. [2021-12-15 11:18:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:33,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-15 11:18:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:33,371 INFO L225 Difference]: With dead ends: 3182 [2021-12-15 11:18:33,371 INFO L226 Difference]: Without dead ends: 2150 [2021-12-15 11:18:33,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:33,375 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 413 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:33,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 638 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:33,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-12-15 11:18:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1612. [2021-12-15 11:18:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 1.6157666045934203) internal successors, (2603), 1611 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2603 transitions. [2021-12-15 11:18:33,444 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2603 transitions. Word has length 73 [2021-12-15 11:18:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:33,445 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2603 transitions. [2021-12-15 11:18:33,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2603 transitions. [2021-12-15 11:18:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 11:18:33,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:33,449 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] [2021-12-15 11:18:33,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:18:33,449 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:33,452 INFO L85 PathProgramCache]: Analyzing trace with hash -131454774, now seen corresponding path program 1 times [2021-12-15 11:18:33,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:33,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739090481] [2021-12-15 11:18:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:33,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:33,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:33,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739090481] [2021-12-15 11:18:33,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739090481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:33,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:33,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:33,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534656702] [2021-12-15 11:18:33,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:33,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:33,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:33,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:33,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:33,528 INFO L87 Difference]: Start difference. First operand 1612 states and 2603 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:33,677 INFO L93 Difference]: Finished difference Result 4676 states and 7610 transitions. [2021-12-15 11:18:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-15 11:18:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:33,692 INFO L225 Difference]: With dead ends: 4676 [2021-12-15 11:18:33,692 INFO L226 Difference]: Without dead ends: 3124 [2021-12-15 11:18:33,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:33,698 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 411 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:33,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 724 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-12-15 11:18:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 2356. [2021-12-15 11:18:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 1.6148619957537156) internal successors, (3803), 2355 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 3803 transitions. [2021-12-15 11:18:33,804 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 3803 transitions. Word has length 74 [2021-12-15 11:18:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:33,804 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 3803 transitions. [2021-12-15 11:18:33,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 3803 transitions. [2021-12-15 11:18:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 11:18:33,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:33,810 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] [2021-12-15 11:18:33,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:18:33,813 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:33,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:33,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1364954579, now seen corresponding path program 1 times [2021-12-15 11:18:33,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:33,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937021719] [2021-12-15 11:18:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:33,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:33,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:33,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937021719] [2021-12-15 11:18:33,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937021719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:33,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:33,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:33,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282618618] [2021-12-15 11:18:33,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:33,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:33,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:33,890 INFO L87 Difference]: Start difference. First operand 2356 states and 3803 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:34,064 INFO L93 Difference]: Finished difference Result 6796 states and 11038 transitions. [2021-12-15 11:18:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-15 11:18:34,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:34,084 INFO L225 Difference]: With dead ends: 6796 [2021-12-15 11:18:34,084 INFO L226 Difference]: Without dead ends: 4500 [2021-12-15 11:18:34,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:34,092 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 409 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:34,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 733 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4500 states. [2021-12-15 11:18:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4500 to 3412. [2021-12-15 11:18:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 1.612723541483436) internal successors, (5501), 3411 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 5501 transitions. [2021-12-15 11:18:34,253 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 5501 transitions. Word has length 75 [2021-12-15 11:18:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:34,254 INFO L470 AbstractCegarLoop]: Abstraction has 3412 states and 5501 transitions. [2021-12-15 11:18:34,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 5501 transitions. [2021-12-15 11:18:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:18:34,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:34,268 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] [2021-12-15 11:18:34,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:18:34,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:34,270 INFO L85 PathProgramCache]: Analyzing trace with hash 915332421, now seen corresponding path program 1 times [2021-12-15 11:18:34,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:34,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921019122] [2021-12-15 11:18:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:34,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:34,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921019122] [2021-12-15 11:18:34,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921019122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:34,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:34,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:34,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404471366] [2021-12-15 11:18:34,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:34,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:34,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:34,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:34,319 INFO L87 Difference]: Start difference. First operand 3412 states and 5501 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:34,439 INFO L93 Difference]: Finished difference Result 7762 states and 12522 transitions. [2021-12-15 11:18:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-15 11:18:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:34,461 INFO L225 Difference]: With dead ends: 7762 [2021-12-15 11:18:34,462 INFO L226 Difference]: Without dead ends: 5340 [2021-12-15 11:18:34,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:34,469 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 110 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:34,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 443 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2021-12-15 11:18:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 5338. [2021-12-15 11:18:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 1.6001498969458496) internal successors, (8540), 5337 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 8540 transitions. [2021-12-15 11:18:34,698 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 8540 transitions. Word has length 76 [2021-12-15 11:18:34,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:34,699 INFO L470 AbstractCegarLoop]: Abstraction has 5338 states and 8540 transitions. [2021-12-15 11:18:34,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 8540 transitions. [2021-12-15 11:18:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:18:34,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:34,701 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] [2021-12-15 11:18:34,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:18:34,702 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash -318395451, now seen corresponding path program 1 times [2021-12-15 11:18:34,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:34,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015233810] [2021-12-15 11:18:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:34,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:34,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:34,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015233810] [2021-12-15 11:18:34,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015233810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:34,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:34,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:34,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201993879] [2021-12-15 11:18:34,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:34,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:34,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:34,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:34,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:34,769 INFO L87 Difference]: Start difference. First operand 5338 states and 8540 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:34,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:34,952 INFO L93 Difference]: Finished difference Result 11658 states and 18702 transitions. [2021-12-15 11:18:34,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:34,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-15 11:18:34,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:34,984 INFO L225 Difference]: With dead ends: 11658 [2021-12-15 11:18:34,984 INFO L226 Difference]: Without dead ends: 7904 [2021-12-15 11:18:34,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:34,994 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 116 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:34,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 477 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2021-12-15 11:18:35,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 7902. [2021-12-15 11:18:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7902 states, 7901 states have (on average 1.5919503860270852) internal successors, (12578), 7901 states have internal predecessors, (12578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7902 states to 7902 states and 12578 transitions. [2021-12-15 11:18:35,323 INFO L78 Accepts]: Start accepts. Automaton has 7902 states and 12578 transitions. Word has length 76 [2021-12-15 11:18:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:35,323 INFO L470 AbstractCegarLoop]: Abstraction has 7902 states and 12578 transitions. [2021-12-15 11:18:35,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 7902 states and 12578 transitions. [2021-12-15 11:18:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 11:18:35,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:35,325 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] [2021-12-15 11:18:35,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:18:35,326 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 700947013, now seen corresponding path program 1 times [2021-12-15 11:18:35,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:35,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118622793] [2021-12-15 11:18:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:35,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:35,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:35,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118622793] [2021-12-15 11:18:35,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118622793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:35,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:35,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:35,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135789753] [2021-12-15 11:18:35,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:35,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:35,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:35,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:35,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:35,363 INFO L87 Difference]: Start difference. First operand 7902 states and 12578 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:35,643 INFO L93 Difference]: Finished difference Result 17511 states and 28108 transitions. [2021-12-15 11:18:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-15 11:18:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:35,701 INFO L225 Difference]: With dead ends: 17511 [2021-12-15 11:18:35,701 INFO L226 Difference]: Without dead ends: 11763 [2021-12-15 11:18:35,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:35,716 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 122 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:35,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 503 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11763 states. [2021-12-15 11:18:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11763 to 11761. [2021-12-15 11:18:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11761 states, 11760 states have (on average 1.5872448979591838) internal successors, (18666), 11760 states have internal predecessors, (18666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11761 states to 11761 states and 18666 transitions. [2021-12-15 11:18:36,170 INFO L78 Accepts]: Start accepts. Automaton has 11761 states and 18666 transitions. Word has length 76 [2021-12-15 11:18:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:36,170 INFO L470 AbstractCegarLoop]: Abstraction has 11761 states and 18666 transitions. [2021-12-15 11:18:36,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 11761 states and 18666 transitions. [2021-12-15 11:18:36,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 11:18:36,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:36,172 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] [2021-12-15 11:18:36,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:18:36,172 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 411123109, now seen corresponding path program 1 times [2021-12-15 11:18:36,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:36,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557814083] [2021-12-15 11:18:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:36,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:36,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:36,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557814083] [2021-12-15 11:18:36,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557814083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:36,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:36,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:36,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150609547] [2021-12-15 11:18:36,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:36,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:36,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:36,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:36,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:36,268 INFO L87 Difference]: Start difference. First operand 11761 states and 18666 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:36,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:36,661 INFO L93 Difference]: Finished difference Result 23438 states and 37217 transitions. [2021-12-15 11:18:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:36,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 11:18:36,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:36,688 INFO L225 Difference]: With dead ends: 23438 [2021-12-15 11:18:36,689 INFO L226 Difference]: Without dead ends: 11763 [2021-12-15 11:18:36,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:18:36,706 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 301 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:36,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 591 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11763 states. [2021-12-15 11:18:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11763 to 11761. [2021-12-15 11:18:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11761 states, 11760 states have (on average 1.5766156462585035) internal successors, (18541), 11760 states have internal predecessors, (18541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11761 states to 11761 states and 18541 transitions. [2021-12-15 11:18:37,136 INFO L78 Accepts]: Start accepts. Automaton has 11761 states and 18541 transitions. Word has length 77 [2021-12-15 11:18:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:37,137 INFO L470 AbstractCegarLoop]: Abstraction has 11761 states and 18541 transitions. [2021-12-15 11:18:37,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 11761 states and 18541 transitions. [2021-12-15 11:18:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-15 11:18:37,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:37,138 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] [2021-12-15 11:18:37,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:18:37,139 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash 224831213, now seen corresponding path program 1 times [2021-12-15 11:18:37,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:37,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040697046] [2021-12-15 11:18:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:37,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:37,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:37,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040697046] [2021-12-15 11:18:37,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040697046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:37,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:37,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:37,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602630760] [2021-12-15 11:18:37,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:37,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:37,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:37,229 INFO L87 Difference]: Start difference. First operand 11761 states and 18541 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:37,923 INFO L93 Difference]: Finished difference Result 33682 states and 53251 transitions. [2021-12-15 11:18:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:37,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-15 11:18:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:37,986 INFO L225 Difference]: With dead ends: 33682 [2021-12-15 11:18:37,986 INFO L226 Difference]: Without dead ends: 22007 [2021-12-15 11:18:38,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:18:38,013 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 187 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:38,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 787 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22007 states. [2021-12-15 11:18:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22007 to 22005. [2021-12-15 11:18:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22005 states, 22004 states have (on average 1.5649881839665516) internal successors, (34436), 22004 states have internal predecessors, (34436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22005 states to 22005 states and 34436 transitions. [2021-12-15 11:18:38,725 INFO L78 Accepts]: Start accepts. Automaton has 22005 states and 34436 transitions. Word has length 80 [2021-12-15 11:18:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:38,726 INFO L470 AbstractCegarLoop]: Abstraction has 22005 states and 34436 transitions. [2021-12-15 11:18:38,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 22005 states and 34436 transitions. [2021-12-15 11:18:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 11:18:38,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:38,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:38,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:18:38,728 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:38,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2048742578, now seen corresponding path program 1 times [2021-12-15 11:18:38,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:38,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683981054] [2021-12-15 11:18:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:38,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:18:38,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:38,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683981054] [2021-12-15 11:18:38,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683981054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:38,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:38,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:18:38,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850253513] [2021-12-15 11:18:38,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:18:38,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:18:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:18:38,850 INFO L87 Difference]: Start difference. First operand 22005 states and 34436 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:40,050 INFO L93 Difference]: Finished difference Result 42912 states and 66453 transitions. [2021-12-15 11:18:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 11:18:40,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-15 11:18:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:40,169 INFO L225 Difference]: With dead ends: 42912 [2021-12-15 11:18:40,169 INFO L226 Difference]: Without dead ends: 42910 [2021-12-15 11:18:40,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:18:40,189 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 1016 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:40,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42910 states. [2021-12-15 11:18:41,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42910 to 23091. [2021-12-15 11:18:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23091 states, 23090 states have (on average 1.5380251190991772) internal successors, (35513), 23090 states have internal predecessors, (35513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23091 states to 23091 states and 35513 transitions. [2021-12-15 11:18:41,140 INFO L78 Accepts]: Start accepts. Automaton has 23091 states and 35513 transitions. Word has length 81 [2021-12-15 11:18:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:41,140 INFO L470 AbstractCegarLoop]: Abstraction has 23091 states and 35513 transitions. [2021-12-15 11:18:41,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 23091 states and 35513 transitions. [2021-12-15 11:18:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 11:18:41,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:41,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:41,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:18:41,144 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:41,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash -601727771, now seen corresponding path program 1 times [2021-12-15 11:18:41,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:41,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988923993] [2021-12-15 11:18:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:41,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 11:18:41,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:41,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988923993] [2021-12-15 11:18:41,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988923993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:41,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:41,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:41,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298500904] [2021-12-15 11:18:41,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:41,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:41,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:41,211 INFO L87 Difference]: Start difference. First operand 23091 states and 35513 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:42,260 INFO L93 Difference]: Finished difference Result 56431 states and 87041 transitions. [2021-12-15 11:18:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:42,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-15 11:18:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:42,393 INFO L225 Difference]: With dead ends: 56431 [2021-12-15 11:18:42,393 INFO L226 Difference]: Without dead ends: 45489 [2021-12-15 11:18:42,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:18:42,435 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 525 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:42,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 919 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45489 states. [2021-12-15 11:18:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45489 to 35483. [2021-12-15 11:18:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35483 states, 35482 states have (on average 1.536525562256919) internal successors, (54519), 35482 states have internal predecessors, (54519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35483 states to 35483 states and 54519 transitions. [2021-12-15 11:18:43,844 INFO L78 Accepts]: Start accepts. Automaton has 35483 states and 54519 transitions. Word has length 109 [2021-12-15 11:18:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:43,846 INFO L470 AbstractCegarLoop]: Abstraction has 35483 states and 54519 transitions. [2021-12-15 11:18:43,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:43,846 INFO L276 IsEmpty]: Start isEmpty. Operand 35483 states and 54519 transitions. [2021-12-15 11:18:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 11:18:43,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:43,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:43,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:18:43,849 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1835455643, now seen corresponding path program 1 times [2021-12-15 11:18:43,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:43,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111837291] [2021-12-15 11:18:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:43,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 11:18:43,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:43,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111837291] [2021-12-15 11:18:43,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111837291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:43,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:43,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:43,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85861121] [2021-12-15 11:18:43,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:43,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:43,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:43,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:43,929 INFO L87 Difference]: Start difference. First operand 35483 states and 54519 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:45,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:45,174 INFO L93 Difference]: Finished difference Result 60807 states and 93801 transitions. [2021-12-15 11:18:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:45,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-15 11:18:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:45,295 INFO L225 Difference]: With dead ends: 60807 [2021-12-15 11:18:45,295 INFO L226 Difference]: Without dead ends: 49865 [2021-12-15 11:18:45,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:18:45,318 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 522 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:45,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 984 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49865 states. [2021-12-15 11:18:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49865 to 48067. [2021-12-15 11:18:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48067 states, 48066 states have (on average 1.5370324137644074) internal successors, (73879), 48066 states have internal predecessors, (73879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48067 states to 48067 states and 73879 transitions. [2021-12-15 11:18:46,750 INFO L78 Accepts]: Start accepts. Automaton has 48067 states and 73879 transitions. Word has length 109 [2021-12-15 11:18:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:46,750 INFO L470 AbstractCegarLoop]: Abstraction has 48067 states and 73879 transitions. [2021-12-15 11:18:46,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 48067 states and 73879 transitions. [2021-12-15 11:18:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 11:18:46,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:46,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:46,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:18:46,754 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash -816113179, now seen corresponding path program 1 times [2021-12-15 11:18:46,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:46,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684617393] [2021-12-15 11:18:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:46,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:18:46,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:46,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684617393] [2021-12-15 11:18:46,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684617393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:46,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:46,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:18:46,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932100804] [2021-12-15 11:18:46,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:46,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:18:46,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:46,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:18:46,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:18:46,816 INFO L87 Difference]: Start difference. First operand 48067 states and 73879 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:48,370 INFO L93 Difference]: Finished difference Result 68235 states and 105419 transitions. [2021-12-15 11:18:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:18:48,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-15 11:18:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:48,506 INFO L225 Difference]: With dead ends: 68235 [2021-12-15 11:18:48,507 INFO L226 Difference]: Without dead ends: 57033 [2021-12-15 11:18:48,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:18:48,540 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 515 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:48,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 970 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:48,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57033 states. [2021-12-15 11:18:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57033 to 55235. [2021-12-15 11:18:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55235 states, 55234 states have (on average 1.539396024188) internal successors, (85027), 55234 states have internal predecessors, (85027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55235 states to 55235 states and 85027 transitions. [2021-12-15 11:18:50,142 INFO L78 Accepts]: Start accepts. Automaton has 55235 states and 85027 transitions. Word has length 109 [2021-12-15 11:18:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:50,143 INFO L470 AbstractCegarLoop]: Abstraction has 55235 states and 85027 transitions. [2021-12-15 11:18:50,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 55235 states and 85027 transitions. [2021-12-15 11:18:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 11:18:50,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:50,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:50,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:18:50,147 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1029835514, now seen corresponding path program 1 times [2021-12-15 11:18:50,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:50,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543263721] [2021-12-15 11:18:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:50,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:18:50,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:50,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543263721] [2021-12-15 11:18:50,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543263721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:50,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:50,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:18:50,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376700998] [2021-12-15 11:18:50,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:50,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:18:50,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:18:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:50,380 INFO L87 Difference]: Start difference. First operand 55235 states and 85027 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:52,491 INFO L93 Difference]: Finished difference Result 121863 states and 188380 transitions. [2021-12-15 11:18:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:18:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-15 11:18:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:52,689 INFO L225 Difference]: With dead ends: 121863 [2021-12-15 11:18:52,690 INFO L226 Difference]: Without dead ends: 88933 [2021-12-15 11:18:52,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:18:52,849 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 99 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:52,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 398 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:18:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88933 states. [2021-12-15 11:18:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88933 to 88728. [2021-12-15 11:18:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88728 states, 88727 states have (on average 1.5408612936310255) internal successors, (136716), 88727 states have internal predecessors, (136716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88728 states to 88728 states and 136716 transitions. [2021-12-15 11:18:55,468 INFO L78 Accepts]: Start accepts. Automaton has 88728 states and 136716 transitions. Word has length 110 [2021-12-15 11:18:55,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:18:55,468 INFO L470 AbstractCegarLoop]: Abstraction has 88728 states and 136716 transitions. [2021-12-15 11:18:55,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand 88728 states and 136716 transitions. [2021-12-15 11:18:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 11:18:55,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:18:55,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:18:55,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 11:18:55,472 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:18:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:18:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1452537340, now seen corresponding path program 1 times [2021-12-15 11:18:55,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:18:55,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699875438] [2021-12-15 11:18:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:18:55,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:18:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:18:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:18:55,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:18:55,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699875438] [2021-12-15 11:18:55,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699875438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:18:55,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:18:55,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:18:55,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604635431] [2021-12-15 11:18:55,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:18:55,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:18:55,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:18:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:18:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:55,526 INFO L87 Difference]: Start difference. First operand 88728 states and 136716 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:18:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:18:58,528 INFO L93 Difference]: Finished difference Result 158229 states and 244725 transitions. [2021-12-15 11:18:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:18:58,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-15 11:18:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:18:58,770 INFO L225 Difference]: With dead ends: 158229 [2021-12-15 11:18:58,770 INFO L226 Difference]: Without dead ends: 121573 [2021-12-15 11:18:58,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:18:58,843 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 224 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:18:58,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 745 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:18:58,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121573 states. [2021-12-15 11:19:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121573 to 117928. [2021-12-15 11:19:02,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117928 states, 117927 states have (on average 1.5393845345001569) internal successors, (181535), 117927 states have internal predecessors, (181535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:19:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117928 states to 117928 states and 181535 transitions. [2021-12-15 11:19:02,770 INFO L78 Accepts]: Start accepts. Automaton has 117928 states and 181535 transitions. Word has length 110 [2021-12-15 11:19:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:19:02,771 INFO L470 AbstractCegarLoop]: Abstraction has 117928 states and 181535 transitions. [2021-12-15 11:19:02,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:19:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 117928 states and 181535 transitions. [2021-12-15 11:19:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 11:19:02,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:19:02,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:19:02,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 11:19:02,775 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:19:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:19:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 126590076, now seen corresponding path program 1 times [2021-12-15 11:19:02,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:19:02,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369547051] [2021-12-15 11:19:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:19:02,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:19:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:19:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 11:19:02,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:19:02,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369547051] [2021-12-15 11:19:02,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369547051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:19:02,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:19:02,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:19:02,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307733207] [2021-12-15 11:19:02,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:19:02,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:19:02,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:19:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:19:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:19:02,837 INFO L87 Difference]: Start difference. First operand 117928 states and 181535 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:19:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:19:06,181 INFO L93 Difference]: Finished difference Result 180491 states and 278790 transitions. [2021-12-15 11:19:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:19:06,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-15 11:19:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:19:06,483 INFO L225 Difference]: With dead ends: 180491 [2021-12-15 11:19:06,484 INFO L226 Difference]: Without dead ends: 146381 [2021-12-15 11:19:06,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:19:06,525 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 234 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:19:06,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 681 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:19:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146381 states. [2021-12-15 11:19:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146381 to 139225. [2021-12-15 11:19:10,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139225 states, 139224 states have (on average 1.5384488306613802) internal successors, (214189), 139224 states have internal predecessors, (214189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)